Way Outta Control
Join Date: Sep 1999
Location: The Palouse
Thanked 3 Times in 3 Posts
Re: pinion shims
Book learnin' is fine, but there's no replacement for hands on experience. If you've done your research, have the tools and are patient, long suffering, and detailed you can do the work. But beware, you can ruin a gear set in as little as 10 miles if they are not set up correctly.
If the gears aren't set up properly you may/may not get a gear whine. But in any case the gears will build up heat. Now gears are hardened to a tolerance depth below the gear surface. If the heat builds up there is a reason and that is because of improper mesh. This heat radiates out to the rest of the differential and axle system. By this time it's too late. The heat has already destroyed the heat treatment from the factory, and the gears are most likely grinding themselves apart.
I've set up gearing only a couple of times, and I can tell you from my own experience that there is a HUGE pucker factor doing this work. Were I to do it again, I'd still be sitting there scratching my head and measuring three-four times, checking the gear pattern, double/triple checking the gear pattern.
It would still carry a pucker factor for me.