12 Bolt Backlash
 

Hello, going through my rear for the Impala, 12 Bolt w/ spool and 4:88 Pro Gears- what amount of backlash should I be looking for?

Thanks!
Will Lamprecht 65 Impala 396-325 I/SA in progress

Re: 12 Bolt Backlash
 

I look for .006 - .008 in our car.

Re: 12 Bolt Backlash
 

.005-.009 with automatic...tighter with stick

Re: 12 Bolt Backlash
 

In all the 12 bolts I did, I tried to get .008" back lash,on a street application, as much as .010' is OK due to the fact that any heat soak can cause this spec to tighten up. I'm also assuming room temperature gears at the time of set up. Sometimes, the pro gears take different shims to arrive at the same spec as the street gears.