davidws6

iTrader: (36)

I had a 2 series Auburn Posi laying around so picked up a Thick set of 4.11 gears to stuff into a 7.5 10 bolt. I have a Pinion depth tool and it measured 2.313 on Pinion depth with the original shim that was on the original 3.42 gear. On the new pinion, it has CD 2.311 so that's .002 thicker pinion shim. Though it also has + 8 so if that's the case, that means + .008 on the Shim ? Been a long time since I installed a R & P, attached is a pic of the pattern I now have. It's looks like it's not deep enough into the ring gear ? Thx 4 any help

homemade87

Heres a site that has a lot of good info to refresh your memory . I have used this from time to time . It also has a + - chart for the pinion depth . + 8 seems like a lot . I would add the .002 and run a pattern check at the 2.311 and another at 2.299 and see which one looks better of the three all using the same backlash , maybe trying a couple different backlashes on all three to see the affect . Cant tell much about your pattern . Best to use the yellow marking paint . It shows up better in pictures .

http://www.pirate4x4.com/tech/billavista/Gear_Setup/

01ssreda4

iTrader: (96)

I always start with a stock shim and adjust from that pattern. I always have a set of hollowed out setup bearings to make changing shims simple. Ive never measured pinion depth and my rear ends always handle lots of abuse.

davidws6

iTrader: (36)

Thx for the info. I have a spreader so the shims are no prob. Staying with the original shim pack thickness so have correct carrier preload.

01ssreda4

iTrader: (96)

I meant pinion bearings for mock up. Ive never reused stock shims for the carrier. Youll need to adjust them to achieve proper backlash.

FirstYrLS1Z

iTrader: (4)

the 2.311 is pinion depth,the +8(.008) should be pinion/ring lash. AND both are a starting point for pattern paint marking.

here's how a used 4.56 Richmond set was marked I installed