3.27 shim

[TURBOSNOOP]

just wonder what thickness opinoin shim have you guys seen when you pull your gears? i dont have those special tools and i dont know someone with them either.any help will be great.thanks.

 

[Raffaelli]

On a new ford racing gearset, there should be a chalk marking on the new pinion. 1, 2, 0, -1, -2, ect.

IIRC, those are for adding or subtracting (10X) thosandths of an inch to your factory pinion depth shim measurment.

For example, your in car pinion shims measure .050 of an inch. A 2 marked on the pinion would be +.020 to that measurment. So total shims would need to be .070.

Subtract the change if its a negative chalk number.

Its been a long time since I did this, and going off memory alone. Research it elsewhere. But If I remember right it sets up pinion depth almost perfectly with a new ford gearset in a factory (untouched) rearend.

 

[KillNThrill24]

i literally just finished doing my 4.10's yesterday and the 3.27 pinion had 1 shim on it and there wasnt a number or anything on it. the bearing kit that i got (frpp) gave me a bag full of shims and they were all the same size. i grinded out the old bearing and test fitted my 4.10 pinion with the grinded out bearing so it didnt have to be pressed on and off and ended up using the original shim on it. still gave me the perfect depth and then the backlash was also dead centered using original factory shims. iv put around 70mi on the setup and have had 0 issues and no humming of any sort