C6 Z06 diff gear install help.
Thread Starter
Racer
Joined: May 2004
Posts: 497
Likes: 3
From: Hafnarfirdi
C6 Z06 diff gear install help.
I did finish me ring and pinion so I’m replacing if with new ring and pinion. I’m living in Iceland so there is non GM dealer in Iceland. I did purchase 4 cares of special tools to du this job and help through GM web side profiting all speck and info hove to do this. We have now done this be the book and those photos are showing the result. The people helping me witch are experts in dialing on gears in normal diff. According to those photos I’m told that the ring and pinion are beryl making marks and there for way of. Is there anyone that can look at this and assist me? The free play was 0,12 witch is nor than it should be witch is max 0,6.
Thanks Ingó.
[IMG]
[/IMG]
Thanks Ingó.
[IMG]
[/IMG]
Platinum Supporting Vendor
Joined: Sep 2001
Posts: 3,665
Likes: 341
Yea you have major issues. Either two things your ring and pinion are not touching each other which explains why there is not no print or you are not doing it correctly. In order to get the "pattern" you need to spin the pinion and put resistance on the ring gear so that you can get the grease to imprint the pattern. There are shims and a special tool required to get the correct backlash and preload. If you don't have these then you are pretty much wasting your time and money. I don't mean to sound harsh, but the reality is those diffs require certain tools and skill set, if you don't have at least the tools, then that diff will come apart. You should have just bought a new diff from the dealer and been done with it.
Thanks
Justin
Thanks
Justin
Melting Slicks
Joined: Sep 2007
Posts: 2,597
Likes: 3
From: READING PA
St. Jude Donor '08-'09-'10
The wipe pattern looks good on some of the teeth which is a function of pinion depth. .012 is too slopy and you should try to get the lash to about
.005 to .007 . You have the tools and only the best of shops are doing it.
Most of us just change out the pumpkin. Seems like a .004 shim behind the ring gear will do it. I used to do them but it's been a while but the basics
are the same. Good luck.
.005 to .007 . You have the tools and only the best of shops are doing it.
Most of us just change out the pumpkin. Seems like a .004 shim behind the ring gear will do it. I used to do them but it's been a while but the basics
are the same. Good luck.
Thread Starter
Racer
Joined: May 2004
Posts: 497
Likes: 3
From: Hafnarfirdi
Yea you have major issues. Either two things your ring and pinion are not touching each other which explains why there is not no print or you are not doing it correctly. In order to get the "pattern" you need to spin the pinion and put resistance on the ring gear so that you can get the grease to imprint the pattern. There are shims and a special tool required to get the correct backlash and preload. If you don't have these then you are pretty much wasting your time and money. I don't mean to sound harsh, but the reality is those diffs require certain tools and skill set, if you don't have at least the tools, then that diff will come apart. You should have just bought a new diff from the dealer and been done with it.
Thanks
Justin
Thanks
Justin
I have all the special tools for this job and how to do it from GM. But the shop witch is helping me is not used to work on Corvette C6 diff so all input is well taken. Since I’m not the expert it slimed strange to me be going be the book and having all the special tools needed and not getting any foot print! To me ether it was spot on or way off !! To me if you go be the book you should be spot on, but what about the foot print. Me diff specialist told me it is so much way of and not even touching!! So the question is for those C6 diff if they are correctly dial in will the foot print look same as any other regular diff?
Thanks Ingó.
Thread Starter
Racer
Joined: May 2004
Posts: 497
Likes: 3
From: Hafnarfirdi
The wipe pattern looks good on some of the teeth which is a function of pinion depth. .012 is too slopy and you should try to get the lash to about
.005 to .007 . You have the tools and only the best of shops are doing it.
Most of us just change out the pumpkin. Seems like a .004 shim behind the ring gear will do it. I used to do them but it's been a while but the basics
are the same. Good luck.
.005 to .007 . You have the tools and only the best of shops are doing it.
Most of us just change out the pumpkin. Seems like a .004 shim behind the ring gear will do it. I used to do them but it's been a while but the basics
are the same. Good luck.
I hope you are correct and I only need to deal with the lash.
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
Top 10 Most Explosive Corvettes Ever Made: Power-to-Weight Ratio Ranked!
Joe Kucinski
150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter
Joe Kucinski
8 Coolest Corvette Pace Cars (and Replicas) of All Time
Verdad Gallardo
Top 10 Corvette Engines RANKED by Peak Torque (70+ Years of Muscle!)
Joe Kucinski
Corvette ZR1X Will Be Pacing the Indy 500, And Could Probably Race, Too!
Verdad Gallardo
Top 10 Corvettes Coming to Mecum Indy 2026!
Brett Foote
Top 10 C9 Corvette MUST-HAVES to Fix These C8 Generation Flaws!
Michael S. Palmer
10 Revolutionary 'Corvette Firsts' Most People Don't Know
Joe Kucinski
5 Reasons to Upgrade to an LS6-Powered Corvette; 5 Reasons to Stay LT2
Michael S. Palmer
Former Vendor
Joined: Apr 2001
Posts: 2,719
Likes: 3
From: Anderson Indiana
If the ring gear is not touching the pinion,I must ask are you sure you have the correct gear set? Base gears are not the same as Z06 gear sets, both come in 3.42 ratios though.
Looking back at the pics again it appears you have the correct gear set. First you need to set pinion depth, work the carrier to set proper backlash,then run the pattern. If the pattern is not right make changes to achieve the proper pattern.
Looking back at the pics again it appears you have the correct gear set. First you need to set pinion depth, work the carrier to set proper backlash,then run the pattern. If the pattern is not right make changes to achieve the proper pattern.
Last edited by rodney@rpmtransmissions; Nov 10, 2010 at 08:34 PM.
Platinum Supporting Vendor
Joined: Sep 2001
Posts: 3,665
Likes: 341
You are not applying enough resistance when you do your pattern, when you do it right you will see a very clear pattern. Yes there have been lots of excuses over the years about patterns and what they are supposed to look like, follow your gut on the old stuff, that is the pattern I go after. I want to see a nice oval pattern in that gear. The back lash is important and if you have the correct tools you will get it there. Also the preload which is about .004, you need to hit that on the head and there is a tool for you to properly set this up with the correct shim. If you feel don't feel good about what they are doing, you can ship it to me and I will do it.
Thanks
Justin
Thanks
Justin
