cmonkey713

I have two new GM Axel nuts ready to install tomorrow on my 2007 coupe. I have located a TSB 07-04-95-001 dated October 1, 2007 which shows the torque for the nuts at 160 ft lbs. Is this torque spec still good or has the spec been superseded? Also should I use red Loctite? Thanks to all.

RicK T

Torque recommendation was reduced shortly after that 160 came out. The new one is 140 but many here have used to less with success. And yes, must use the loctite.

http://forums.corvetteforum.com/1573202325-post39.html

Gearhead Jim

In another thread, someone posted what was supposed to be the latest number, and it was still 160.

I'd stop by a friendly dealer and have them look it up for you, they should have a computer connection to GM with the latest info.

EDIT:
Our 2006 used a 33mm socket, but our 2009 needs 34mm.

switchplanner

If you get an answer on the current recommended torque please share. I'm planning to replace mine in the spring. Thanks.

ATC399

Whats the issue/s with your current ones?

switchplanner

I believe that some were not tightened correctly from the factory, too loose allowing the axle hub to move. Recommendation is to replace with new nuts vs just re-tightening. Not sure why.

talon90

It's not that they were not tightened correctly, there was a larger than design intent variation with the nuts that would not allow the nuts to hold the proper torque over time.

The assembly plant brings the 1/2 shafts in with thread lock now which is why the TSB recommends the use of thread lock.

The problem surrounds the nut and the fact that it has a slight concave surface that when torqued, flattens out to the mating face of the hub. Previously and over time, the nut would relax and allow the nut to lose torque. The higher torque of new spec is intended to minimize that relaxation effect. The reason you need a new nut when you apply the TSB is because the old nut has all ready been flattened in the initial application and can be damaged if attempted to be re-torqued to the old spec. If you are successful in applying the torque to the old nut, because the concavity is not present you can actually pull the half shaft out by applying too much load on the hub while tightening.

OnPoint

OP,

While you're changing out the axle nuts, it's a good idea to lube the axle splines. Helps keep thing quiet.

JoesC5

This info is from 2007, so there may be a later update.....

1. Remove existing nut
2. Apply Goodwrench # 12345493 (also known as Loctite 272) on threads in area where nut finally seats
3. Install new nut (p/n 10257766)
4. Torque nut to 190Nm (140 ft-lb), static
5. Allow 24 hours cure time.

Update 9/13/2007

PS- make sure you have a socket that fits the nut before applying loctite to the threads.

427Z0SX

Haven't had any problem with my 06 Z06, should I change them?
Thanks,

xcutter

My 05 C6 were loose. I tightened them and they never loosened in three years of ownership. I just went out and checked my 08 Z06. Still at 140 after 4 years. Did not use loctite with either. Maybe I am just lucky.

cclive

I used a marker to draw a line across the nut and shaft so that I can easily tell if the nut has loosened at all, without having to check the torque. The old nut is a 33mm hex, the new one is slightly beefier and needs 34mm.

Axel is a guy in "Beverly Hills Cop".

glenB

Who is Axel Nut and why does he need to be replaced?

Is he not doing the job he was hired for?

Does Axel Nut work with Elbow Grease?

Goatdad

He's friends with Ben Dover.

Radioman

and his Uncle is Kanutin Valve'...

xcutter

He is a cousin of Axel Foley

Boomer111

And remember to let the car sit 24 hours before driving. Pain in the ars if not a DIY job.

Could be a problem if shop does it and does not have room for it over might for such a small job.

I drove mine home, 1 mile, not exceeding 25 mph with no braking or quick accelerating.

Why you might ask no concrete reason really. Did it immediately after nuts were tightened.

Two years ago and no problems since. I did have the grinding noise prior to replacement so I know what it sounds like.