Gear wear pattern. What do i need to change - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

flyinglow57 · 02-20-2018, 05:20 PM

What needs shimmed

ttshovel · 02-21-2018, 05:18 AM

what's backlash at? looks like it needs to be deeper in the ring gear. and maybe a little bit added to the pinion shim. I like to take a beating and hone out the center so it slides on and off by hand just to set them up and put a new bearing on when it's all said and done. so you're not pressing it on and off, potentially destroying them

flyinglow57 · 02-21-2018, 07:06 AM

Backlash was at .0035

ttshovel · 02-21-2018, 08:48 AM

I'd try adding a little bit to the pinion and see what you've got then. that should move the pattern towards the heel a little and get it a little deeper in the ring gear

these rears take very minimal backlash so that is good.

frankwjr · 02-21-2018, 09:18 AM

What gears OP? If AAM please read up on 2 step vs 5 step cut gear sets...http://www.demandaam.com/technical-s...ng-pinion-sets

when I did mine since it is a 2 step cut the pattern WILL look a bit different than what most people expect...and setting the pinion depth can be a B(the above suggestion regarding making the bearings internal id larger works but only if replacing the bearings-most don't-I did) on a non GM WILL require a diff pinion shim...I got lucky(not really-research pays off) and was able to just take the shim from my 3.45 and put it on the AAM pinion...even after replacin all the bearings the pattern and backlash were perfect-.002 on the backlash, tight to allow breakin..used Mobile LS gear oil, change at 500 mi..over 2 to 3k mileage so far...whisper quiet. mileage includes about 50 runs down the 1/4 and lets just say some hwy over 100(safely!HAHAHA).

good luck OP looks like you are on the right track..make sure to get the bearing caps tq'd properly and while you are in there seriously consider replacin the axle seals..easy and cheap. l8tr

02-20-2018, 05:20 PM	#1
flyinglow57 Drives: rumble bee,2SS 6sp Join Date: May 2009 Location: pittsburgh, PA Posts: 539	Gear wear pattern. What do i need to change What needs shimmed Attached Images __________________ blk 2ss 6spd with sunroof. intake,tsp cam,full exhaust,pcmforless tune,trailing arms,toe rods. hopeing for 11.9 because my g/f said she will take the cam and the suspension back if not.

02-21-2018, 05:18 AM	#2
ttshovel Drives: 12 camaro ss, 72 chevelle, 91camaro Join Date: Dec 2013 Location: findlay,oh Posts: 2,069	what's backlash at? looks like it needs to be deeper in the ring gear. and maybe a little bit added to the pinion shim. I like to take a beating and hone out the center so it slides on and off by hand just to set them up and put a new bearing on when it's all said and done. so you're not pressing it on and off, potentially destroying them __________________ 12 camaro ss 427lsx, th400, f310 heads, crower shaft mounts, gpi specd solid roller, shearerfab 2k hp a/w, twin bullseye 88mm turbos, hughes pro ssx bolt together converter, holley dominator, 8.50 cert, backhalf, Ford 9", 33x17x16 tires, c16 fuel

02-21-2018, 07:06 AM	#3
flyinglow57 Drives: rumble bee,2SS 6sp Join Date: May 2009 Location: pittsburgh, PA Posts: 539	Backlash was at .0035 __________________ blk 2ss 6spd with sunroof. intake,tsp cam,full exhaust,pcmforless tune,trailing arms,toe rods. hopeing for 11.9 because my g/f said she will take the cam and the suspension back if not.

02-21-2018, 08:48 AM	#4
ttshovel Drives: 12 camaro ss, 72 chevelle, 91camaro Join Date: Dec 2013 Location: findlay,oh Posts: 2,069	I'd try adding a little bit to the pinion and see what you've got then. that should move the pattern towards the heel a little and get it a little deeper in the ring gear these rears take very minimal backlash so that is good. __________________ 12 camaro ss 427lsx, th400, f310 heads, crower shaft mounts, gpi specd solid roller, shearerfab 2k hp a/w, twin bullseye 88mm turbos, hughes pro ssx bolt together converter, holley dominator, 8.50 cert, backhalf, Ford 9", 33x17x16 tires, c16 fuel

02-21-2018, 09:18 AM	#5
frankwjr Drives: 2010 SS 2SS M6 Join Date: Aug 2016 Location: Smithsburg, Md. Posts: 2,445	What gears OP? If AAM please read up on 2 step vs 5 step cut gear sets...http://www.demandaam.com/technical-s...ng-pinion-sets when I did mine since it is a 2 step cut the pattern WILL look a bit different than what most people expect...and setting the pinion depth can be a B(the above suggestion regarding making the bearings internal id larger works but only if replacing the bearings-most don't-I did) on a non GM WILL require a diff pinion shim...I got lucky(not really-research pays off) and was able to just take the shim from my 3.45 and put it on the AAM pinion...even after replacin all the bearings the pattern and backlash were perfect-.002 on the backlash, tight to allow breakin..used Mobile LS gear oil, change at 500 mi..over 2 to 3k mileage so far...whisper quiet. mileage includes about 50 runs down the 1/4 and lets just say some hwy over 100(safely!HAHAHA). good luck OP looks like you are on the right track..make sure to get the bearing caps tq'd properly and while you are in there seriously consider replacin the axle seals..easy and cheap. l8tr __________________ 2010 SS 2SS M6 - Tune by RDP dynoSteve!(Woot) - Daily Driver - *150K!* - All work by me...