Upgrading your C5 rear with C6 Z06 guts
12-11-2009, 09:34 PM
#1
Melting Slicks
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St. Jude Donor '08-'09-'10-'11
Upgrading your C5 rear with C6 Z06 guts
On the request of few forum members, I have listed all the GM part numbers for this upgrade.
Upgraded parts
Left axle shaft 89060119
Right axle shaft 89060120
Right side gear 19180962
Right side snap ring 12458084
C6 Z06 clutches 19132906 (need 2)
HD spring for the clutches 19132817 (need 2)
C6 Z06 pinion carrier 89060110
Parts you need to re-seal
Axle seals 88996703 (need 2)
Side cover o rings 89047953 (need 2)
Rear cover o ring 89047954
Trans/diff seal o ring 12369456
Output shaft seal (inner) 19206242
Output shaft seal (outer) 12455045
Misc
Pinion retaining nut 12458142 (can use your old one)
Diff stud 88984492 (this mounts to the back of the trans)
Trans fluid 88861800 (replaces Dex III)
Synthetic diff fluid 89021677 (This part # have been superceeded to 88862624)
LS gear oil 88862624 (if you don't upgrade to C6 Z06 clutches)
Upgraded parts
Left axle shaft 89060119
Right axle shaft 89060120
Right side gear 19180962
Right side snap ring 12458084
C6 Z06 clutches 19132906 (need 2)
HD spring for the clutches 19132817 (need 2)
C6 Z06 pinion carrier 89060110
Parts you need to re-seal
Axle seals 88996703 (need 2)
Side cover o rings 89047953 (need 2)
Rear cover o ring 89047954
Trans/diff seal o ring 12369456
Output shaft seal (inner) 19206242
Output shaft seal (outer) 12455045
Misc
Pinion retaining nut 12458142 (can use your old one)
Diff stud 88984492 (this mounts to the back of the trans)
Trans fluid 88861800 (replaces Dex III)
Synthetic diff fluid 89021677 (This part # have been superceeded to 88862624)
LS gear oil 88862624 (if you don't upgrade to C6 Z06 clutches)
Last edited by ragtopws6; 06-12-2018 at 01:09 PM. Reason: added part numbers
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12-12-2009, 08:31 AM
#5
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Nice comparison shots. Thanks for the pics.
12-12-2009, 09:44 PM
#8
Melting Slicks
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St. Jude Donor '08-'09-'10-'11
Yes, all the mentioned parts will fit into the C5 case without issues and are available at your local GM dealer. The really difficult part of doing this is setting the shims (pinion, case and side cover) for proper pattern and back lash. If you don't have the correct (Kent Moore) tools and the info on calculating the initial pinion shim, this job is going to be really, REALLY hard!
12-13-2009, 12:03 AM
#11
Le Mans Master
how much cost do you have in parts on this project?
12-13-2009, 12:14 AM
#12
Melting Slicks
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St. Jude Donor '08-'09-'10-'11
Including the micro polished 4.10 Motive gears, about $1,400. Someone well known on this forum told me he hasn't seen the C6 Z06 shaft break. Well, I have few people with my diffs that will put that to the test next year! 
12-13-2009, 06:49 AM
#13
Melting Slicks
12-13-2009, 09:46 AM
#14
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Hey Rick, great post.
I didn't have that rear end leak after all but I do have a noise in the Vette I would like you to listen too.
I will PM you
Martin
I didn't have that rear end leak after all but I do have a noise in the Vette I would like you to listen too.
I will PM you
Martin
01-05-2010, 06:28 AM
#15
Drifting
Yes, all the mentioned parts will fit into the C5 case without issues and are available at your local GM dealer. The really difficult part of doing this is setting the shims (pinion, case and side cover) for proper pattern and back lash. If you don't have the correct (Kent Moore) tools and the info on calculating the initial pinion shim, this job is going to be really, REALLY hard!
01-05-2010, 11:10 AM
#17
Melting Slicks
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St. Jude Donor '08-'09-'10-'11
Here is the calculation on C5 pinion shim setup:
B1 = pinion & drivers side measurement (need Kent Moore tool J42168)
B = 0.197"
B - B1 = B2
A1 = numbers on pinion gear
A = nominal value of 4.055"
A1 - A = B3
B2 + B3 = pinion shim thickness
B1 = pinion & drivers side measurement (need Kent Moore tool J42168)
B = 0.197"
B - B1 = B2
A1 = numbers on pinion gear
A = nominal value of 4.055"
A1 - A = B3
B2 + B3 = pinion shim thickness
Last edited by ragtopws6; 01-05-2010 at 11:12 AM.
01-10-2010, 06:38 PM
#18
C5 rear upgrade
I don't know a thing about what works with what as far as the rear diffs. are concerned. But, I figure that's probably the next weakest link in my drivetrain and the next thing I'll be repairing...
So, my question is this: I already have the C5 300M hardened left and right shafts now, do you know if they will work with the C6 Z06 pinion and clutches? I'm thinking that hybrid might make for a fairly stout rearend. Or, are the output shafts different dimensions to where I'd need to replace mine with some C6 version? Thank you.
-Rick
So, my question is this: I already have the C5 300M hardened left and right shafts now, do you know if they will work with the C6 Z06 pinion and clutches? I'm thinking that hybrid might make for a fairly stout rearend. Or, are the output shafts different dimensions to where I'd need to replace mine with some C6 version? Thank you.
-Rick
01-10-2010, 07:13 PM
#19
Melting Slicks
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St. Jude Donor '08-'09-'10-'11
I don't know a thing about what works with what as far as the rear diffs. are concerned. But, I figure that's probably the next weakest link in my drivetrain and the next thing I'll be repairing...
So, my question is this: I already have the C5 300M hardened left and right shafts now, do you know if they will work with the C6 Z06 pinion and clutches? I'm thinking that hybrid might make for a fairly stout rearend. Or, are the output shafts different dimensions to where I'd need to replace mine with some C6 version? Thank you.
-Rick
So, my question is this: I already have the C5 300M hardened left and right shafts now, do you know if they will work with the C6 Z06 pinion and clutches? I'm thinking that hybrid might make for a fairly stout rearend. Or, are the output shafts different dimensions to where I'd need to replace mine with some C6 version? Thank you.
-Rick
Last edited by ragtopws6; 06-12-2018 at 01:10 PM.
