AXLE NUTS...FYI..

[Hib Halverson]

I am taking delivery of an 08 this week. Should I purchase the new nuts and loctite and replace the nuts when I get home?

No.

When you visit the dealer to take delivery but before you sign the final papers, tell them you want the TSB concerning rear axle nuts performed on your car IF the breakpoint for the fix at the factory is after your VIN.

On a brand new car that's just been delivered, I would not take the DIY approach, even if you do your own work. You paid for a warranty, let GM fufill that warranty.

 

[dtvet]

No.

When you visit the dealer to take delivery but before you sign the final papers, tell them you want the TSB concerning rear axle nuts performed on your car IF the breakpoint for the fix at the factory is after your VIN.

On a brand new car that's just been delivered, I would not take the DIY approach, even if you do your own work. You paid for a warranty, let GM fufill that warranty.

I would rather do it myself. That being said, what VIN is the first with the correction? I'd like to check my VIN to see if I even need to do anything. Or does the nut look significantly different?

 

[jbeidl]

I would rather do it myself. That being said, what VIN is the first with the correction? I'd like to check my VIN to see if I even need to do anything. Or does the nut look significantly different?

I do not believe that a TSB has been formally released yet, Hib may have better information. The part number of the nut has not changed. The new nuts are identical to the old ones. GM just want you to use a "Fresh" nut if you have the issue.

If you prefer to do it yourself, just check the torque of both spindle nuts when you get the car home. They should be at least 118 ft-lb. If they are, everything is fine for now. I would check them again at each oil change to see that they are not coming loose. If you have one that comes loose on it's own then you need to follow the procedure from the plant in the first post (unused nut, Loctite 272 and 140 ft-lb torque).

Save The Wave,
John :

 

[dtvet]

I do not believe that a TSB has been formally released yet, Hib may have better information. The part number of the nut has not changed. The new nuts are identical to the old ones. GM just want you to use a "Fresh" nut if you have the issue.

If you prefer to do it yourself, just check the torque of both spindle nuts when you get the car home. They should be at least 118 ft-lb. If they are, everything is fine for now. I would check them again at each oil change to see that they are not coming loose. If you have one that comes loose on it's own then you need to follow the procedure from the plant in the first post (unused nut, Loctite 272 and 140 ft-lb torque).

Save The Wave,
John :

Thanks. What I'll do is check them and if they are less than 140 ft-lbs, I'll get new nuts, loctite and just replaced them and be done with it. . .

 

[jbeidl]

Thanks. What I'll do is check them and if they are less than 140 ft-lbs, I'll get new nuts, loctite and just replaced them and be done with it. . .

I expect that from the factory they might only be at 118 ft-lb and not have Loctite. Look for the signs of Loctite before you check torque (it should be red). The way the procedure is worded you only do the new nut, Loctite and 140 ft-lb

If there is presence of the nut "indexing and/or looseness"

We will have to wait for the actual TSB to see if initial installation has been changed to 140 ft-lb with the use of Loctite. The procedure in the 07 Service manual is NO Loctite and 118 ft-lb.

Save The Wave,
John

 

[dtvet]

I expect that from the factory they might only be at 118 ft-lb and not have Loctite. Look for the signs of Loctite before you check torque (it should be red). The way the procedure is worded you only do the new nut, Loctite and 140 ft-lb

If there is presence of the nut "indexing and/or looseness"

We will have to wait for the actual TSB to see if initial installation has been changed to 140 ft-lb with the use of Loctite. The procedure in the 07 Service manual is NO Loctite and 118 ft-lb.

Save The Wave,
John

All good points. Based on that, I will look for now and wait for the TSB. Where is a good place to TSB's? Alldata.com used to have them, but now you have to pay to see them. . .

 

[jbeidl]

All good points. Based on that, I will look for now and wait for the TSB. Where is a good place to TSB's? Alldata.com used to have them, but now you have to pay to see them. . .

Hib might also be able to help with the location of TSB's. I believe that there are some on CorvetteMechanic.com forums, but I am not sure all of them are there, especially the latest.

Save The Wave,
John

 

[hardnoks]

tsb

There is in fact A TSB,don't have the # in front of me.That states 118 ft lbs.The later info from the factory says LOCTITE and 140 FT LBS.
Here's a kicker for you all.I had mine done at chevy,and they charged me 21 bucks!I was surprised!!!Well,I went to the site the guy in this thread posted about and told them of the few issues,very few mind you,with my vette.I got a response from a guy there and he told me to mail in my receipt for the TSB and GM will reimburse me!I say-FABULOUS!!

 

[Hib Halverson]

I would rather do it myself. That being said, what VIN is the first with the correction? I'd like to check my VIN to see if I even need to do anything. Or does the nut look significantly different?

I do not have break point information at this time, but I will eventually.

 

[jbeidl]

There is in fact A TSB,don't have the # in front of me.That states 118 ft lbs.The later info from the factory says LOCTITE and 140 FT LBS.

There was a TSB near the end of 2005 that describes the current procedure (118 ft-lb NO Loctite) in the 2006 and 2007 Service Manuals (I don't have a 2005 Service Manual to see what it contains).

I suspect that the information I received from the factory is for a TSB that will be released in the near future from the information Hib obtained.

Good news on the refund. It seems that GM is quite responsive to the Owner Feedback on the assembly plant Web site. I have not heard anything bad yet about the responsiveness.

Save The Wave,
John

 

[hardnoks]

tsb

This # is right off my bill from the dealer."PERFORM REAR AXLE TORQUE""SET TORQUE AS PER BULLETIN" is what the whole thing says,then the #.
TSB 05-04-95-001.

 

[jbeidl]

This # is right off my bill from the dealer."PERFORM REAR AXLE TORQUE""SET TORQUE AS PER BULLETIN" is what the whole thing says,then the #.
TSB 05-04-95-001.

That is the old TSB from 2005. It does not include Loctite and the recommended torque is 118 ft-lb. Based on the information Hib obtained, I suspect that there is a new TSB in the works which includes the procedure described in the first post.

The full 05-04-95-001 TSB can be seen at http://forums.corvetteforum.com/showthread.php?p=1560764373

I hope that there are no forum rules about making reference to a topic on another forum. If there is I am sorry and I am sure one of the moderators will let me know.

Also note that GM has a new part number for the Loctite. The new number is 89021297. I purchased some yesterday, it comes in a 10 ml bottle. Seems everyone locally sells the Permatex brand and I could not find any Permatex 27200 (equivalent to Loctite 272), only 27100 which is not as strong and has a lower temperature rating.

hardnoks, can you edit the first post to include both the original GM Loctite number and the new part number contained in this note?

Save The Wave,
John

 

[hardnoks]

TSB

Edit is done in 1st post.My car was done before I heard of the newer fix.That's the only TSB I have to go on.

 

[Hib Halverson]

The earlier of these TSBs, 05-04-95-001, is not the one which is the topic, here.

A new TSB has either been just issued or will be soon issued and covers, among other things, the new nut and tightening procedure.

This also might not truly be "new" it might be a revision of the first one.

 

[hardnoks]

The earlier of these TSBs, 05-04-95-001, is not the one which is the topic, here.

A new TSB has either been just issued or will be soon issued and covers, among other things, the new nut and tightening procedure.

This also might not truly be "new" it might be a revision of the first one.
__________________
Hib Halverson

Well,at least this is a starting point to get to the newer info that I posted when I started the thread.I'm sure a TSB will be out on the newer stuff sooner or later.

 

[jbeidl]

TSB #07-04-95-001

A TSB has been released for the Spindle (Axle) nut issue. The TSB number is in the title above.

The only change I noticed from the preliminary information is the removal of the GM part number for the Loctite and an increase in torque from 140 ft-lb to 160 ft-lb.

Save The Wave,
John

 

[hardnoks]

A TSB has been released for the Spindle (Axle) nut issue. The TSB number is in the title above.

The only change I noticed from the preliminary information is the removal of the GM part number for the Loctite and an increase in torque from 140 ft-lb to 160 ft-lb.

THERE's a guy in another forum thread who said his stuff broke at those torque specs.Did you see the post?

 

[jbeidl]

THERE's a guy in another forum thread who said his stuff broke at those torque specs.Did you see the post?

Yes, I saw that. He also said it happened 3 times, but he did not say where the failure occurred. The spindle shaft is about 1" diameter at the threads. That is a BIG bolt and should be able to withstand much more than 160 ft-lb.

I plan to make a post over there and ask where the failure occurred. Also note that there was a post by Ranger who was happy the torque was increased - I think he is heavy into drag racing.

Save The Wave,
John

 

[Hib Halverson]

Coincidentally....yesterday (9/28) I followed up with GM on this and whether or not the "new" TSB had been issued was one question I asked. I have yet to get a reply.

Obviously, the answer would have been: "We're issuing it tomorrow."

On the "breakage" report from another forum...I tend to discount that. It seems unlikely that nut on a 1" shaft is going to break at 160 ft/lbs unless.....the device used to measure torque is reading way low, the hardware had a prexisting defect or other installation procedures were faulty.

 

[vettefan]

Any update on this? Are the 2008's affected also?