New info to consider when upgrading a rear 60 to 35 spline shafts.
I was under the assumption that all
Dana 60 spindles could be be bored large enough (about 1.60") to accept 35 spline shafts. That is not true.
Today I was helping my brother swap the rear axle in his '77 W200 (a standard duty Dana 60). The axle we swapped in was a standard duty Dana 60 from an '85 W350. During the swap, I noticed that the spindles were NOT the same, as I had expected.
The '85 standard duty Dana 60 measured 2.00" at BOTH bearing locations.
The '77 standard duty Dana 60 measured 2.00" at the inner bearing, but only 1.80" at the outer bearing. If this spindle were bored from the stock 1.42" I.D. to 1.60", the spindle would be FAR too thin.
A little more info. Although the original rear axle from my brother's '77 W200 is known to be the factory installed axle, it seems to actually be a '76 Dana 60. He knows this because the parts store listings for bearings and seals never fit, he has to buy parts for a '76 for them to fit properly. The bearings listed for a '77 Dana 60 are actually the same as those listed for the '85. So '76 must have been the last year for the smaller spindle, but can still be found in '77's.
I suppose I need to pull the shafts from my '75 Dana 60 HD and see if it too has the smaller spindles, or maybe this was the standard duty spindle only for those years.