Questions on gear change

[xtremeon20z]

Hello all I have a 2004 ssr and I'm wanting to change to 4.30 gears. I was wondering if what I'm
Ordering is 8.5 10 bolt 4.30 ring and pinion and 8.5 bearing kit or 8.6 . Im trying to get all my ducks in a row so Friday I can make a day of it. I read on here some say the auto is 8.6 some say it's 8.5. Tbs ms to all for all yall help. It's tough here in la because there's not many sources out here so I appreciate everything yall fanatics have done to help me thru this.

[MnMsToy]

Originally Posted by xtremeon20z

Hello all I have a 2004 ssr and I'm wanting to change to 4.30 gears. I was wondering if what I'm
Ordering is 8.5 10 bolt 4.30 ring and pinion and 8.5 bearing kit or 8.6 . Im trying to get all my ducks in a row so Friday I can make a day of it. I read on here some say the auto is 8.6 some say it's 8.5. Tbs ms to all for all yall help. It's tough here in la because there's not many sources out here so I appreciate everything yall fanatics have done to help me thru this.

Watch this video first: Motive Gear Ring and Pinion

[DOOPHUS]

Originally Posted by MnMsToy

Watch this video first:

Very interesting stuff, Mike.

[xtremeon20z]

I'm no doing it myself a shop is but im ordering the parts

[xoxoxoBruce]

I just read through the whole "rear drive axle" section, of the 2006 service manual. They give all the procedures, trouble shooting, torque/shim/preload/backlash specs, but no mention of 8.5 or 8.6.

Maybe the owner's manual?