Quote:
Originally Posted by SledPuller21
We run .003 lash, pinion preload just over factory specs(too tight is robbing horsepower) set shims up behind the race not the pinion bearing, and change every 10-12 passes. I ran my current one for 16 passes before it broke.
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I run more backlash but overall I agree with this. I do think partially it has to do with how your truck is set up and drving style too. Different backlashes will result in different shock loads depending on how you drive and how far you come out before dropping the clutch.
In the rear, billet caps and a 3/8-1/2" steel girdle with snubber bolts has worked well for me this year. I made it 8 passes before I saw a crack in the ring teeth. I started breaking front ring and pinions every 3rd pass and then I started setting up the shims behind the pinion bearing race with better results.
Also on pinions that have an oil flinger they tend to bend around the gear and loosen the pinion so if you can get some hardened shims instead thats a good idea.