Author Topic: Rear axle lower after 2,5" lift  (Read 1280 times)

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Offline Sir Keppa

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Rear axle lower after 2,5" lift
« on: May 15, 2020, 02:00:48 am »
Hi everyone, my question might be stupid but i ll give it a go ;)

Bought me a Skyjacker 2,5" lift kit with all new leave springs and the black max shocks. It now has been installed by a shop and when i get it back i realized that the rear is about 1,5" lower than the front.
The RC had the factory suspension installed before but the mechanic removed the spacer block in the rear and tossed it. I dont have any spacer on the rear axle now and thats why its lower...there was no spacer block in the Skyjacker kit.

My question is if we would have used the factory block the rear would have been higher than the front right? I want the car leveled front and rear. If the rear is "sagging" 1,5" now, should i choose a 1,5" spacer or should i go with a slightly bigger one?

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    Offline DODGEBOYS

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    Re: Rear axle lower after 2,5" lift
    « Reply #1 on: May 15, 2020, 09:07:55 am »
    l,d put the factory 2 1/2 -3 inch block back in , you gotta remember that the front springs are gonna sag out and settle as will the rears
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    Offline u2slow

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    Re: Rear axle lower after 2,5" lift
    « Reply #2 on: May 15, 2020, 06:19:03 pm »

    The RC had the factory suspension installed before but the mechanic removed the spacer block in the rear and tossed it.

    Your mechanic owes you a set of spacer blocks.
    DD: 90 D250 6BT|5spd|D60/3.54/Lockright
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    Offline Elwenil

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    Re: Rear axle lower after 2,5" lift
    « Reply #3 on: May 15, 2020, 09:34:01 pm »
    ^^^ This, and find a better mechanic.
    L.Clemons

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    Offline Sir Keppa

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    Re: Rear axle lower after 2,5" lift
    « Reply #4 on: May 17, 2020, 07:39:28 am »
    Thanks guys.
    Yes the mechanic made a mistake but he is a nice guy...he should have known better.


    Offline Chilly

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    Re: Rear axle lower after 2,5" lift
    « Reply #5 on: May 17, 2020, 05:37:25 pm »
    Irritates me when mechanics decide customers dont want their property back.
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    Offline Elwenil

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    Re: Rear axle lower after 2,5" lift
    « Reply #6 on: May 17, 2020, 06:53:30 pm »
    I would say that less than 1% of vehicle owners care about receiving the parts removed from their vehicle during service.
    L.Clemons

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    Offline Chilly

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    Re: Rear axle lower after 2,5" lift
    « Reply #7 on: May 17, 2020, 07:22:26 pm »
    Lift blocks arent same as worn out brake pads.
    92 Ramcharger
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    Offline Elwenil

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    Re: Rear axle lower after 2,5" lift
    « Reply #8 on: May 18, 2020, 06:44:00 am »
    Granted they shouldn't have been removed in the first place, but I imagine the mechanic thought of them as something unneeded from the stock suspension.  When we put a lift on, we toss the old springs, because no one wants them.  I'd say the mechanic thought the same since that is pretty standard.
    L.Clemons

    1988 Ramcharger AW450-318EFI-NP435 4 speed-NP205 Transfer Case-Dana 60s-Braden Wormdrive Front Winch

    2018 Ram 2500HD Crew Cab 4WD 5.7L

    I am the unknown Will,
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    Offline dodge82273

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    Re: Rear axle lower after 2,5" lift
    « Reply #9 on: May 18, 2020, 12:24:35 pm »
    maybe he's just not a dodge guy and to him blocks are a no no .....
    78 to 93 parts trucks
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    Offline Mopar572

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    Re: Rear axle lower after 2,5" lift
    « Reply #10 on: May 19, 2020, 08:18:05 am »
    If its the skyjacker full spring 2.5" lift the block is supposed to be tossed, says so right in the directions.  Now if skyjacker sent you the wrong front or rear springs that would make sense since the 2.5" full spring lift uses 4" rears to get rid of the block.  Are you sure you dont have 4" spring on the front?  The front springs should be D200S abd the rears should be DR40S....if you got anything else you didnt get the right springs and its a skyjacker issue not a mechanic issue.

    From the instructions:

    9. On vehicles that are not Cummings Diesel models: For 2" SYSTEMS the factory blocks are
    removed. On 4" SYSTEMS using: a) part #DR40, install on top of factory block; b) part #DR60,
    remove the factory blocks. On 6" and 8" SYSTEMS, install the new Skyjacker rear springs on
    top of the blocks.
    « Last Edit: May 19, 2020, 08:22:18 am by Mopar572 »
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    Offline J10Mike

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    Re: Rear axle lower after 2,5" lift
    « Reply #11 on: May 24, 2020, 04:50:05 pm »
    After doing my all spring 4 inch lift, I didn't care for the lower rear end look as well. I bought 1.5 inch non-tapered blocks for the rear axle and installed them. As much as I hate blocks, it sure did level up my RC. I'm good with it.
    1977 Ramcharger, CTD 4bt/46rh/NP241, HX30w, M3 fuel pin, 6 inch lift, BFG 35s, Front D60 w/Detroit Truetrac. Rear HD60 w/Detroit Locker.

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    Offline Jeffy45

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    Re: Rear axle lower after 2,5" lift
    « Reply #12 on: May 25, 2020, 06:58:00 am »
    The factory block on my 88 ramcharger is 3 3/8" your gonna want it to initially sit higher in the rear. Because if its level eventually it will be lower cause the springs will start to sag pending on how you load it..                                                                .         
           It seems like the 2.5" system should come w/ a 6" rear spring instead of a 4" when the block is removed. If you are now 1.5" low a 6" should be .5" higher in the rear perfect in a perfect world🤔         this has been discussed before i believe?
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    Offline bobber stu

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    Re: Rear axle lower after 2,5" lift
    « Reply #13 on: May 25, 2020, 01:03:14 pm »
    The factory block on my 88 ramcharger is 3 3/8" your gonna want it to initially sit higher in the rear. Because if its level eventually it will be lower cause the springs will start to sag pending on how you load it..                                                                .         
           It seems like the 2.5" system should come w/ a 6" rear spring instead of a 4" when the block is removed. If you are now 1.5" low a 6" should be .5" higher in the rear perfect in a perfect world🤔         this has been discussed before i believe?

    I've ordered the 2/2.5 inch lift kit as well, it hasn't shipped yet because they're waiting on the 4 inch rear springs, I'm worried now after reading this thread that the rear will sit too low, should I call them up and ask if the 4 inch springs are correct?
    Especially as I'm in France it will be a real pita to change them if incorrect....

    My factory spacers are 2.9 inches, its a 1977 W200 (M884)

    After doing my all spring 4 inch lift, I didn't care for the lower rear end look as well. I bought 1.5 inch non-tapered blocks for the rear axle and installed them. As much as I hate blocks, it sure did level up my RC. I'm good with it.

    Did you have to get longer u-bolts to fit the spacers?

    I could cut my factory spacers down I guess if I needed to, I have a bridgeport mill to mill them flat and true if I did cut them down.

    Offline Jeffy45

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    Re: Rear axle lower after 2,5" lift
    « Reply #14 on: May 25, 2020, 01:28:26 pm »
    I believe someone on here has called and asked before and the conclusion was it should be a 6-inch spring without using the block. If I remember correctly. I would call
    1988 Ramcharger LE 150 318 TBI 727 non-lockup.                   
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    Offline Jeffy45

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    Re: Rear axle lower after 2,5" lift
    « Reply #15 on: May 25, 2020, 01:31:21 pm »
    and or find someone that has installed the 2.5 " system on a 77 ramcharger. What was the outcome?
    1988 Ramcharger LE 150 318 TBI 727 non-lockup.                   
           " If a law is unjust, a man is not only right to disobey it,   
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    Offline bobber stu

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    Re: Rear axle lower after 2,5" lift
    « Reply #16 on: May 25, 2020, 03:55:16 pm »
    Thanks for the reply, I'll try calling tomorrow although the last time I called they weren't very helpful, I asked what size the rear spring bush bolts were as mine are 5/8 and they told me 9/16 I assume he was refering to the U-bolts....
    As I said, I've been waiting for the kit to ship for awhile as they've been waiting on the 4 inch rear springs, if the 6 inch ones will be better they are in stock so I could have had my kit ages ago! sods law I guess.
    Anyhow I'll let you know how the call goes.

    Offline Jeffy45

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    Re: Rear axle lower after 2,5" lift
    « Reply #17 on: May 25, 2020, 05:33:46 pm »
    Rocky mountain suspension is very helpful and accommodating
    1988 Ramcharger LE 150 318 TBI 727 non-lockup.                   
           " If a law is unjust, a man is not only right to disobey it,   
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    Offline Jeffy45

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    Re: Rear axle lower after 2,5" lift
    « Reply #18 on: May 25, 2020, 05:34:58 pm »
    Right now four wheel parts has those lift systems no tax free shipping much cheaper than Skyjacker. Being in France might make a difference not sure
    1988 Ramcharger LE 150 318 TBI 727 non-lockup.                   
           " If a law is unjust, a man is not only right to disobey it,   
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    Offline bobber stu

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    Re: Rear axle lower after 2,5" lift
    « Reply #19 on: May 26, 2020, 10:11:50 am »
    So just got off the phone with skyjacker, talked to someone who sounded like he knew what he was on about lol.
    His answer was that the 4 inch springs are correct for the 2/2.5 inch lift with removing the factory blocks and should result in a level truck so we'll see, still couldn't tell me what size bolts for the rear spring bushes though!
    Also springs are back in stock and my kit is due to ship today  8)

    Offline Jeffy45

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    Re: Rear axle lower after 2,5" lift
    « Reply #20 on: May 26, 2020, 10:29:34 am »
    The kits going to come with Hardware it's going to be smaller than stock hopefully it's grade 8. Years ago it was grade 5. But heard they have switched to grade 8
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    Offline J10Mike

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    Re: Rear axle lower after 2,5" lift
    « Reply #21 on: May 26, 2020, 12:33:12 pm »
    Quote
    Did you have to get longer u-bolts to fit the spacers?
    No, my ubolts were just long enough for the additional 1.5 inches.
    1977 Ramcharger, CTD 4bt/46rh/NP241, HX30w, M3 fuel pin, 6 inch lift, BFG 35s, Front D60 w/Detroit Truetrac. Rear HD60 w/Detroit Locker.

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    Offline Chilly

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    Re: Rear axle lower after 2,5" lift
    « Reply #22 on: May 26, 2020, 06:21:09 pm »
    Skyjacker literature needs cleaned up.  A 4" lift system calls out rear springs that are individually sold as 6-8" springs.  Best way to ID which springs you need is to look at what is included with a lift system for a given ride height.

    My RC had cheapo 4" kit that came with blocks.  To fix the rear so I wouldnt need ANY blocks I installed DR60S rear spring.  Essentially upgraded the cheapo kit to the system bill of material.
    92 Ramcharger
    360 TBI, auto, 241 t-case
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    Offline Jeffy45

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    Re: Rear axle lower after 2,5" lift
    « Reply #23 on: May 31, 2020, 09:23:27 am »
    I'll add this, I said the blocks for the 88 Ramcharger were 3 and 3/8 in.   Leveled and measured they are 3 and 3/8 in the front of the block and 3 and 1/2 in the rear so they do have a slight taper
    1988 Ramcharger LE 150 318 TBI 727 non-lockup.                   
           " If a law is unjust, a man is not only right to disobey it,   
                    he is obligated to do so"                                                   
                                                                 - Thomas Jefferson

    Offline bobber stu

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    Re: Rear axle lower after 2,5" lift
    « Reply #24 on: June 11, 2020, 04:22:09 pm »
    So my kit finally arrived and i've got it installed, although the idiots sent me an incorrect rear shock, hopefully that wont take another 3 months to get sorted, not impressed with skyjackers customer service at all!

    Anyhow it seems to sit slightly higher at the back but wont know for sure until I get it all back together.






    Offline Jeffy45

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    Re: Rear axle lower after 2,5" lift
    « Reply #25 on: June 11, 2020, 09:28:11 pm »
    Sweet,👍👍👍👍👍keep us posted
    1988 Ramcharger LE 150 318 TBI 727 non-lockup.                   
           " If a law is unjust, a man is not only right to disobey it,   
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    Offline bobber stu

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    Re: Rear axle lower after 2,5" lift
    « Reply #26 on: June 15, 2020, 01:32:52 pm »
    Thanks Jeffy, its getting there slowly!

    Rear shocks are out of stock, great!
    Should be in this week though so hopefully I'll get mine next week maybe....

    Next problem is went to fit the rear prop and its too long, its bottoming out on the splines before I can get the rear cups in, I've tried compressing the rear springs with ratchet straps around the axle and chassis which helps but still not enough.

    It looks to be about an inch too long looking at the wear marks on the splines.

    The skyjacker rear springs have tapered shims underneath which tilts the nose of the axle up towards the t-case, wondering if I should take these off ???

    Looking at J10Mikes picture, he doesn't have them fitted....

    Offline Jeffy45

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    Re: Rear axle lower after 2,5" lift
    « Reply #27 on: June 15, 2020, 03:41:54 pm »
    That's a short bed truck correct?   if you take the shims out you might get a vibration with such a short drive shaft seems strange that the drive shaft is too long with a lift it should be too short but you only got 2.5 right so it should be perfect. Hummmmm.....
    1988 Ramcharger LE 150 318 TBI 727 non-lockup.                   
           " If a law is unjust, a man is not only right to disobey it,   
                    he is obligated to do so"                                                   
                                                                 - Thomas Jefferson

    Offline bobber stu

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    Re: Rear axle lower after 2,5" lift
    « Reply #28 on: June 15, 2020, 04:00:46 pm »
    No its a long bed (8ft) must be the camera angle making it look short.
    I know, it doesn't make sense other than the pinion angle now pointing upwards although the drive angle does look spot on, I've measured the new springs from front eye to centre and they're the same as the old ones so its not that the axle is further forward.

    So my conclusion is a combination of more arch in the spring plus the added angle of the pinion has made the prop length shorter.

    Very strange and not sure on the right solution at this point,

    Don't really want to shorten the shaft but might be my only option....


    Offline Jeffy45

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    Re: Rear axle lower after 2,5" lift
    « Reply #29 on: June 15, 2020, 05:23:12 pm »
    Doesn't make sense and you can't push the splines further into the yolk? Binding or bottomed out?? 🤔🤔🤔
    1988 Ramcharger LE 150 318 TBI 727 non-lockup.                   
           " If a law is unjust, a man is not only right to disobey it,   
                    he is obligated to do so"                                                   
                                                                 - Thomas Jefferson

    Offline u2slow

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    Re: Rear axle lower after 2,5" lift
    « Reply #30 on: June 15, 2020, 05:30:12 pm »
    Pull the shims. They typically add vibration anyway because it makes your joint angles unequal.

    When it comes to lifts, I hate 'kits'.
    DD: 90 D250 6BT|5spd|D60/3.54/Lockright
    Tow/haul: 93 W250 Club 6BTA|5spd|D60/80/3.54/Lockright|4" lift|35's|HX35|5x.012s|4" pipe
    Projects: '84 D250 Ramcharger (cummins); '90 W250 Ramcharger (360TBI)
    Hers: 2005 Jeep Liberty V6|6spd|3.73/Trac-lok |3" lift, 245/75R16E Nokians

    Offline bobber stu

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    Re: Rear axle lower after 2,5" lift
    « Reply #31 on: June 16, 2020, 10:07:07 am »
    Doesn't make sense and you can't push the splines further into the yolk? Binding or bottomed out?? 🤔🤔🤔

    Its strange for sure, the splines are definately bottomed out and not binding.
     its gotta be the shims as u2slow said.

    I've been on to skyjacker and of course they've never had this problem before, they've asked for photos which I've sent and they said they'll get back to me with a solution....

    In the meantime I'll take the shims off and try it.

    Offline Jeffy45

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    Re: Rear axle lower after 2,5" lift
    « Reply #32 on: June 16, 2020, 11:35:15 am »
    The shims won't give ya much,  it will either vibrate w/them or without. If the driveshaft is that long its gonna bind  when suspension is compressed and break stuff. Not good$$$
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    Offline u2slow

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    Re: Rear axle lower after 2,5" lift
    « Reply #33 on: June 16, 2020, 12:41:48 pm »
    There's something messed up with your new parts if a driveshaft that used to fit your truck, doesn't fit anymore.

    Maybe you need that factory lift block (or a suitably shorter one) put back in.

    These are really nice for adjusting your setup. I run them on the front for a little extra lift, and to fit a slightly longer driveshaft.
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    Offline Jeffy45

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    Re: Rear axle lower after 2,5" lift
    « Reply #34 on: June 16, 2020, 01:48:18 pm »
    Why do they call it an add a leaf?? All it is, is a 1" lifting block that can be offset.
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    Offline Jeffy45

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    Re: Rear axle lower after 2,5" lift
    « Reply #35 on: June 16, 2020, 01:50:23 pm »
    are you sure you don't have the springs in backwards?
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    Re: Rear axle lower after 2,5" lift
    « Reply #36 on: June 16, 2020, 02:23:58 pm »
    Why do they call it an add a leaf?? All it is, is a 1" lifting block that can be offset.
    Cannot call it a block, and use them under front springs. Call it an add a leaf, and they can be put up front. Of course they downplay the front, and had lawyers write up the description.

    Quote
    You're probably asking about the name. Well, we didn't want to call them blocks since they're really not a true block, they bolt to the spring pack just like another leaf. We didn't want to call them add a leaves since most people think add a leaves will stiffen the springs. So they're an add a leaf that won't stiffen the springs, they add "zero" to the rate.

    Since these are a true bolt in leaf, they are safe to use on the front or rear suspension for extra ride height or to relocate the axle. To use the offset, you bolt the leaf to your spring using one of the offset holes and cut the center pin off to bolt into the leaf in the center hole. This will move your axle forward or backward 1" or 1.5" depending on which hole you use and which way you mount the leaf.
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    Offline bobber stu

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    Rear axle lower after 2,5" lift
    « Reply #37 on: June 16, 2020, 02:42:40 pm »
    Thanks for the input guys, appreciate it.
    This is where Iím at,
    Iíve taken out the tapered shims and made some 5/8Ē blocks from the bottom leaves of my old springs.
    I can now fit the drive shaft, with no weight on the back of the truck I have just under 1/4 of spline movement, with ratchet straps compressing the springs I get about 1/2Ē as the springs compress the shaft gets longer not shorter.
    Iíll leave it at that for now and wait until all the body work is back on and given it a shake down.
    My biggest concern is when the rear becomes unloaded going over bumps etc thatís when the shaft could bottom out and cause damage probably to the t-case 🤔
    Springs are the correct way round ( at least pretty sure they are lol)
    The 1st 2 pics are with the tapered shims in place, with and without ratchet straps.











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    Offline u2slow

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    Re: Rear axle lower after 2,5" lift
    « Reply #38 on: June 16, 2020, 03:45:46 pm »
    Did you happen to tighten the leaf spring eye bolts and shackle bolts without WEIGHT on the rear of the truck?

    Loosen them up, load some weight on the back and see if the suspension settles... potentially shifting the axle rearward a touch.
    « Last Edit: June 16, 2020, 03:47:27 pm by u2slow »
    DD: 90 D250 6BT|5spd|D60/3.54/Lockright
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    Offline bobber stu

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    Re: Rear axle lower after 2,5" lift
    « Reply #39 on: June 16, 2020, 04:06:04 pm »
    Did you happen to tighten the leaf spring eye bolts and shackle bolts without WEIGHT on the rear of the truck?

    Loosen them up, load some weight on the back and see if the suspension settles... potentially shifting the axle rearward a touch.

    No I didn't tighten them up yet, same with the fronts, I usually leave them slightly loose and drive around the yard a bit before tightening up fully. (its not the first time I've fitted leaf springs  ;))

    Offline u2slow

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    Re: Rear axle lower after 2,5" lift
    « Reply #40 on: June 16, 2020, 04:52:37 pm »
    Good stuff - just putting it out there. We all have our occasional brainfarts  ;)
    DD: 90 D250 6BT|5spd|D60/3.54/Lockright
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    Offline Jeffy45

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    Re: Rear axle lower after 2,5" lift
    « Reply #41 on: June 16, 2020, 05:40:34 pm »
    Gotcha burban..                      lightly tighten the u-bolts then put all the weight down on it then torque the u-bolts in this pattern, all the weight must be on the suspension.
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    Offline dodge82273

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    Re: Rear axle lower after 2,5" lift
    « Reply #42 on: June 16, 2020, 11:05:42 pm »
    the arch of the spring being used to replace a thick block from the factory , is what made the shaft TOO long . It will also change the ride quite a bit . shortest distance between 2 points is a straight line , as any weight is added to the truck ( body ?) the shaft will gain clearance to a point ,( less than you'd think )  the shocks often act as a limiter when going airborne over a bump ....  if thats good for them ....or the ride ,  I doubt it .
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    Offline bobber stu

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    Rear axle lower after 2,5" lift
    « Reply #43 on: June 17, 2020, 10:15:49 am »
    Good stuff - just putting it out there. We all have our occasional brainfarts  ;)
    Yeah i know, seems to get worse as I get older too lol
    Didnít mean it to sound like I know everything just that itís not my first rodeo so to speak.
    Iíve been wielding spanners for over 30 yrs both professionally and as a hobby but still make the odd cockup 😜

    So the response from skyjacker is that I have the springs to compressed with the straps, release the straps and the shaft will fit.... err didnít I say I tried that before fitting the straps 🤔


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    Offline Sir Keppa

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    Re: Rear axle lower after 2,5" lift
    « Reply #44 on: June 21, 2020, 04:20:34 pm »
    hey everyone, sorry i lost track on this thread for a short time.

    I have a complete Skyjacker 2,5" leaf lift Kit.
    Front: D200S leafes with D8527 black max shocks
    Rear: DR40S leafes with D8538 black max shocks
    Today i measured all four wheels from ground to wheel case edge and ended with:
    front driver: 37 7/8"
    front pass: 38 5/8"
    rear driver: 37"
    rear pass: 37 3/8"

    I ordered 2" lift blocks from McBay but have not installed them yet. httpss://www.google.com/amp/s/mcbayperformance.com/amp/truck-suv/1-5-2-or-3-rear-block-u-bolt-lift-kit-for-1972-1993-dodge-w100-w150-ramcharger-4x4/

    I red that all Ramchargers tend to be lower at the driver side because of fuel tank, battery, etc. but it really bothers me a bit. You can clearly see the car is leaning to the left from behind.

    https://ramchargercentral.com/vehicle-help/some-sagging-on-the-driver-side/

    Red here that there was a Dodge fix for that and that there is a spacer at https://www.offroaddesign.com but i have not found it yet.

    Over all my suspension feels kind of wonky and very boat like...have factory tire dimensions on the car.
    Would a rear sway bar help to get the car more stable in corners or on uneven roads?

    Oh and the customer support at Skyjackers was very weird as well back when i ordered.

    Offline u2slow

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    Re: Rear axle lower after 2,5" lift
    « Reply #45 on: June 21, 2020, 04:38:20 pm »
    The RC fuel tank is centered... unlike the pickups. But the battery, steering, pedals, driver, etc accounts for some imbalance.

    This is ORD's 1" product...
    https://www.offroaddesign.com/1-zero-rate-add-a-leaf-kit-2-1-2-wide.html
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    Offline Sir Keppa

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    Re: Rear axle lower after 2,5" lift
    « Reply #46 on: June 21, 2020, 05:35:28 pm »
    Thanks for the link i ordered it right away!

    Any suggestions regarding the rear sway bar idea?

    The RC fuel tank is centered... unlike the pickups. But the battery, steering, pedals, driver, etc accounts for some imbalance.

    This is ORD's 1" product...
    https://www.offroaddesign.com/1-zero-rate-add-a-leaf-kit-2-1-2-wide.html

    Offline u2slow

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    Re: Rear axle lower after 2,5" lift
    « Reply #47 on: June 21, 2020, 08:26:50 pm »

    Any suggestions regarding the rear sway bar idea?

    Might not be too bad to adapt a Ford, or later Dodge, rear swaybar. At least the frame width is the same.

    I put D250 leafs in my RC and its sturdy enough. I think the key factor is the extra fat, curved, bottom leaf.
    DD: 90 D250 6BT|5spd|D60/3.54/Lockright
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    Offline Sir Keppa

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    Re: Rear axle lower after 2,5" lift
    « Reply #48 on: June 22, 2020, 12:03:40 am »
    Thanks a lot.

    I am sitting in Germany so my options here are very limited regarding yunk trucks (in fact close to zero).
    It would be necessary to know exactly what i am looking for because try & error would be way to expensive.
    I am open to any more help and/or suggestions.

    Offline Elwenil

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    Re: Rear axle lower after 2,5" lift
    « Reply #49 on: June 22, 2020, 05:40:26 am »
    Just keep firmly in mind that these trucks were designed to carry weight and do reasonably well off road.  They were never designed to handle well and without completely redesigning the suspension, ala KingCrunch's 2WD truck in Germany, you aren't going to come anywhere close to handling curves with any sort of road manners.  Increasing the spring rate, better shocks and larger sway bars will help, but at the end of the day, your wheels are still attached to the vehicle by long, flexible strips of metal with a lot of joints in the system that will add movement where there would not be in a independent suspension vehicle.
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