Quote Originally Posted by txarkitekt View Post
There is a few more things in addition to the backlash...pinion depth, pinion bearing preload, and carrier bearing preload. Shims are used for correct spacing, but each rear end is slightly different, so you have to use a micrometer or dial indicator to get specific depths. It's a pretty intense install unless you know exactly what to do...


That's maybe $75 in tools, cheap.



Quote Originally Posted by duckysbht View Post
I don't think the 4.10s are going to help you any with topend.. I might be wrong but the higher the gear, the more you lose topend


You want to be at the top of the RPM in your chosen gear when you trap.

Do you even know what kind of times you'd pull to run a 130mph trap? Many 12 sec rides only trap mid 100 teens.