[Z06] DYI Axle Nut replacement
#1
Pro
Thread Starter
DYI Axle Nut replacement
There have been several threads on the axle nut issue with the C6, here's my experiance complete with where to buy the nuts at a reasonable price.
Axle Nut TSB:
Bulletin No.: 07-04-95-001A
Date: May 29, 2008
Subject:
Tapping or Scraping Noise From Rear Wheel Area (Replace Wheel Drive Shaft Nut)
Models:
2005-2009 Cadillac XLR
2005-2009 Chevrolet Corvette
Supercede:
This bulletin is being revised to add the 2009 model year. Please discard Corporate Bulletin Number 07-04-95-001 (Section 04 - Driveline/Axle).
Condition
Some customers may comment on a tapping or a scraping noise coming from the rear wheel area.
Cause
This condition may be due to the torque on the wheel drive shaft nut relaxing over time.
Correction
Replace the left and the right wheel drive shaft nut following the procedure below.
1. Remove the center cap from the rim.
2. Remove and discard the wheel drive shaft nut.
3. Apply LOCTITE(TM) 272 or equivalent to the threads of the axle shaft.
4. Install the nut (P/N 10257766) and tighten to the new specification.
Tighten
Tighten the nut to 215 N.m (160 lb ft).
5. Install the center cap to the rim.
Important: The vehicle should not be driven for 24 hours following the repair in order to allow the thread lock to cure.
Parts:
1/2" 34mm socket $10.39 ships free ( http://www.amazon.com/TEKTON-4934-2-...1276520&sr=8-1 )
2 GM#1025-7766 axle nuts $2.89 each +shipping ( http://www.oehq.com/oeparts_GMP10257...-NUT-FWD/S.htm )
LocTite RED 271 $9.95 +shipping ( http://www.use-enco.com/CGI/INSRIT?P...PARTPG=INLMK32 )
Tools:
1/2" Torque Wrench
1/2" Breaker Bar
1/2" Ratchet
1/2" Extension
33mm, 1 5/16", or 34mm socket (whatever works for you). I will say that the 34mm socket will work with the 1 5/16" and 33mm nut, but a 33mm socket probably won't work on a 1 5/16" or 34mm nut.
In Process:
Axle Nut TSB:
Bulletin No.: 07-04-95-001A
Date: May 29, 2008
Subject:
Tapping or Scraping Noise From Rear Wheel Area (Replace Wheel Drive Shaft Nut)
Models:
2005-2009 Cadillac XLR
2005-2009 Chevrolet Corvette
Supercede:
This bulletin is being revised to add the 2009 model year. Please discard Corporate Bulletin Number 07-04-95-001 (Section 04 - Driveline/Axle).
Condition
Some customers may comment on a tapping or a scraping noise coming from the rear wheel area.
Cause
This condition may be due to the torque on the wheel drive shaft nut relaxing over time.
Correction
Replace the left and the right wheel drive shaft nut following the procedure below.
1. Remove the center cap from the rim.
2. Remove and discard the wheel drive shaft nut.
3. Apply LOCTITE(TM) 272 or equivalent to the threads of the axle shaft.
4. Install the nut (P/N 10257766) and tighten to the new specification.
Tighten
Tighten the nut to 215 N.m (160 lb ft).
5. Install the center cap to the rim.
Important: The vehicle should not be driven for 24 hours following the repair in order to allow the thread lock to cure.
Parts:
1/2" 34mm socket $10.39 ships free ( http://www.amazon.com/TEKTON-4934-2-...1276520&sr=8-1 )
2 GM#1025-7766 axle nuts $2.89 each +shipping ( http://www.oehq.com/oeparts_GMP10257...-NUT-FWD/S.htm )
LocTite RED 271 $9.95 +shipping ( http://www.use-enco.com/CGI/INSRIT?P...PARTPG=INLMK32 )
Tools:
1/2" Torque Wrench
1/2" Breaker Bar
1/2" Ratchet
1/2" Extension
33mm, 1 5/16", or 34mm socket (whatever works for you). I will say that the 34mm socket will work with the 1 5/16" and 33mm nut, but a 33mm socket probably won't work on a 1 5/16" or 34mm nut.
In Process:
Last edited by K.Shupe; 07-22-2011 at 12:26 PM.
#2
Tech Contributor
Member Since: Oct 1999
Location: Charlotte, NC (formerly Endicott, NY)
Posts: 40,138
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I guess that didn't work on my car. The dealer is replacing both axle shafts and both rear wheel bearings due to wear making them loose thus causing lots of clicking in the rear.
Bill
Bill
#3
Melting Slicks
Good info...thanks.....FYI some need a 33mm socket....don't know why the difference......
#5
Tech Contributor
Member Since: Oct 1999
Location: Charlotte, NC (formerly Endicott, NY)
Posts: 40,138
Received 8,965 Likes
on
5,350 Posts
My 08 uses the same 33mm socket I used on my C5.
Bill
Bill
#6
Team Owner
I believe the original nuts were 33mm but GM upgraded them to a 34mm.
#7
Drifting
On my '07, I tried both the 34mm and 33mm sockets (from Checker). The 34mm socket seemed a little on the loose side but totally usable. The 33mm socket seemed a little on the tight side but I preferred the tighter fit and bought the 33mm.
Gary
Gary
#8
Team Owner
Was this on your original nuts or new GM replacement nuts?
#9
Pro
Thread Starter
Many have used different sized sockets to fit the axel nut including the 33mm, 1 5/16", as well as 34mm. I'm not saying that the 34mm is the only option, only that this is the one that worked for me. Your milage may vary.....
Last edited by K.Shupe; 07-21-2011 at 07:10 PM.
#10
Race Director
I used a 35mm socket. Kinda baggy, but torques without slipping.
#12
Pro
Thread Starter
The TSB calls for the nuts to be replaced and they have a new part number. I can't say what is different and there are those that have used the old nuts and just tightened to the new spec.
#13
Race Director
and some have double nutted the axle, which should prevent them loosening at the cost of a few ounces of unsprung weight.
#14
What is the official torque spec on the axle nuts?
For new axle nuts... I have seen numbers ranging from 100 to 180 Ft-Ibs of torque. Mitchell's ProDemand says 118 Ft-Ibs. Is this okay?
What about just wanting to tighten the existing/old nuts?
Thanks!
What about just wanting to tighten the existing/old nuts?
Thanks!
#16
Race Director
The updated torque from GM is 160 lb-ft.
I just tightened the old nuts to 160, but over several years found they would loosen up some about every 6 months, so did the 160 lb-ft with new nuts and lockltight myself at home. They have not loosened up again.
Dave
I just tightened the old nuts to 160, but over several years found they would loosen up some about every 6 months, so did the 160 lb-ft with new nuts and lockltight myself at home. They have not loosened up again.
Dave
Last edited by AzDave47; 03-14-2019 at 05:34 PM.
#17
Safety Car
This is one of my spring jobs. Got a 33mm socket and had to touch the inside flats with a Dremel and grinding stone. Fits the new nuts perfectly snug now.