Ok, I’m at the point of putting my final drive / differential together. I’ve already run into some problems setting pinion depth and preload. Here we go.
- I had no outer shims on my pinion and just 4 inner ones. I measured them with a thimble type micrometer and bought new ones to match.
- There was no spacer between bearings
- I have a +4 on my pinion, so I set me depth to 2.625+.004=2.629
- Left the seals off and torqued output nut to 125 ft/lb.
- My preload is really tight. I’d estimate around 40 in/lb just bc the lowest my digital torque wrench goes is 60. Doesn’t feel right, however bearings aren’t lubricated, so not sure.
- I used a piece of key bar stock laying on the carrier bolt holes and measured with a standard digital micrometer zeroed out for the thickness of the bar, which is a huge pita btw, and I keep getting numbers around 2.634-2.640. I know this isn’t the exact tool needed, but it’s what I have. There seems like a large potential for user error based on if I’m perpendicular to the bar.
So, any suggestions? Do the outer shims set the preload on the pinion. Seems to me with no outer shims, it should be the loosest setting… Do I worry about getting pinion depth perfect before preload? How much .001 slop is acceptable? Thanks everyone…