Quote Originally Posted by Cutlass View Post
aah I see where you're going with this now. So do you think a solid spacer instead of a crush sleeve would be a helpful upgrade?
Might be a few more times to get the pre-load right, compared to the ease of the crush collar... But nothing can change now without breaking...

When you launch hard the pin wants to climb the gear and rip itself out of the rear, suddenly drop off the load and the ring wants to eat the pin and spit out the cover....
I would be curious to know what i started off with exactly for the pre-load and if it started making noise, where is the preload now...
Some shops may set the rears up at the very lightest of the drag on the preload for optimal hp, which could be the issue.

I have seen 9", 12blt's, dana 60's, 70's, 80's, everything loosen up, 9" and 9.25 with way low gears pull the collar, that could be the same issue with the 12 blt.