Lowering 3500/350 bed height??
It's getting about time to go truck shopping again & it's down to Ford or GMC/Chev 1 ton SRW. The issue is the bed height of the new trucks. My 5th wheel is an inch or 2 high with my current truck & w...
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How much the thrust angle of the driveline is impacted, depends on the length of the driveshaft from the pinion shaft to the carrier bearing and/or the tailshaft of the transmission (if there is no carrier, intermediate) bearing.
IOW the shorter the distance the more critical the alignment becomes.
Dropping the rear height 2" with a long driveshaft may not impact the U joints at all, whereas a short driveshaft length will. Why, when I lifted my truck 4" fron and back, I rotated the differentials front and rear with degree shims to replicate the angle the OEM had the driveshafts at. I machined my own shims in the shop from die steel and that was 90K miles ago and I have had no U joint issues to date. I did can the OEM U joints almost right away and replaced them with Super U's that are greasable, unlike the factory sealed for life junk.
IOW the shorter the distance the more critical the alignment becomes.
Dropping the rear height 2" with a long driveshaft may not impact the U joints at all, whereas a short driveshaft length will. Why, when I lifted my truck 4" fron and back, I rotated the differentials front and rear with degree shims to replicate the angle the OEM had the driveshafts at. I machined my own shims in the shop from die steel and that was 90K miles ago and I have had no U joint issues to date. I did can the OEM U joints almost right away and replaced them with Super U's that are greasable, unlike the factory sealed for life junk.
