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[GMCnet] Lug nut / Wheel nut Torque [message #249294]

Fri, 09 May 2014 22:37

USAussie

Messages: 15912
Registered: July 2007
Location: Sydney, Australia

Karma:

Senior Member

G'day,

For clarity I will refer to the nuts that hold the wheels onto the hubs as LUG NUTS; they are 9/16 inches diameter and 18 threads
per inch (TPI).

The GMC Maintenance Manuals X-7425, X-7525, X-7625, and X-7725 all specify to tighten the lug nuts to 250 ft lb and NOT to lubricate
the nuts or studs. I checked the Service Bulletins and cannot find any information noting to lower the torque. It has been noted on
the GMCnet that torquing the lug nuts repeatedly to 250 ft lb torque can stretch the wheel studs and cause them to break. It has
been noted to lower the torque to 150 ft lb and lubricate the threads.

I suggest we discuss this and come up with recommendations based on our discussion.

Alcoa wheel lug nuts are a done deal as the lug nuts have 140 ft lb stamped into them.

Regards,
Rob M.
Sydney, Australia
AUS '75 Avion - The Blue Streak TZE365V100428
USA '75 Avion - Double Trouble TZE365V100426

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Regards, Rob M. (USAussie) The Pedantic Mechanic Sydney, Australia '75 Avion - AUS - The Blue Streak TZE365V100428 '75 Avion - USA - Double Trouble TZE365V100426

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[Message index]

		[GMCnet] Lug nut / Wheel nut Torque By: USAussie on Fri, 09 May 2014 22:37
		Re: [GMCnet] Lug nut / Wheel nut Torque By: Harry on Fri, 09 May 2014 23:00
		Re: [GMCnet] Lug nut / Wheel nut Torque By: USAussie on Sat, 10 May 2014 19:44
		Re: [GMCnet] Lug nut / Wheel nut Torque By: USAussie on Sat, 10 May 2014 19:46
		Re: [GMCnet] Lug nut / Wheel nut Torque By: USAussie on Sat, 10 May 2014 19:48
		Re: [GMCnet] Lug nut / Wheel nut Torque By: USAussie on Sat, 10 May 2014 19:50
		Re: [GMCnet] Lug nut / Wheel nut Torque By: USAussie on Sat, 10 May 2014 19:51
		Re: [GMCnet] Lug nut / Wheel nut Torque By: USAussie on Sat, 10 May 2014 19:52
		Re: [GMCnet] Lug nut / Wheel nut Torque By: USAussie on Sat, 10 May 2014 19:54
		Re: [GMCnet] Lug nut / Wheel nut Torque By: USAussie on Sat, 10 May 2014 19:55
		Re: [GMCnet] Lug nut / Wheel nut Torque By: USAussie on Sat, 10 May 2014 19:57
		Re: [GMCnet] Lug nut / Wheel nut Torque By: scott cowden on Sat, 10 May 2014 20:12
		Re: [GMCnet] Lug nut / Wheel nut Torque By: Loffen on Sun, 11 May 2014 05:03
		Re: [GMCnet] Lug nut / Wheel nut Torque By: Matt Colie on Sun, 11 May 2014 08:26
		Re: [GMCnet] Lug nut / Wheel nut Torque By: burtco99 on Mon, 12 May 2014 21:43
		Re: [GMCnet] Lug nut / Wheel nut Torque By: bdub on Mon, 12 May 2014 22:01
		Re: [GMCnet] Lug nut / Wheel nut Torque By: GMC.LES on Tue, 13 May 2014 10:42
		Re: [GMCnet] Lug nut / Wheel nut Torque By: GMC.LES on Tue, 13 May 2014 16:37
		Re: [GMCnet] Lug nut / Wheel nut Torque By: Ken Henderson on Tue, 13 May 2014 20:20
		Re: [GMCnet] Lug nut / Wheel nut Torque By: GMC.LES on Tue, 13 May 2014 21:24
		Re: [GMCnet] Lug nut / Wheel nut Torque By: GMC_LES on Wed, 14 May 2014 11:09
		Re: [GMCnet] Lug nut / Wheel nut Torque By: powerjon on Wed, 14 May 2014 12:25
		Re: [GMCnet] Lug nut / Wheel nut Torque By: A Hamilto on Wed, 14 May 2014 13:24
		Re: [GMCnet] Lug nut / Wheel nut Torque By: Bob de Kruyff on Wed, 14 May 2014 22:47
		Re: [GMCnet] Lug nut / Wheel nut Torque By: powerjon on Wed, 14 May 2014 23:16
		Re: [GMCnet] Lug nut / Wheel nut Torque By: USAussie on Tue, 13 May 2014 21:52
		Re: [GMCnet] Lug nut / Wheel nut Torque By: appie on Tue, 13 May 2014 23:58
		Re: [GMCnet] Lug nut / Wheel nut Torque By: Ken Burton on Wed, 14 May 2014 00:08
		Re: [GMCnet] Lug nut / Wheel nut Torque By: USAussie on Wed, 14 May 2014 00:40
		Re: [GMCnet] Lug nut / Wheel nut Torque By: USAussie on Wed, 14 May 2014 01:37
		Re: [GMCnet] Lug nut / Wheel nut Torque By: appie on Wed, 14 May 2014 01:48
		Re: [GMCnet] Lug nut / Wheel nut Torque By: Loffen on Wed, 14 May 2014 03:14
		Re: [GMCnet] Lug nut / Wheel nut Torque By: Matt Colie on Wed, 14 May 2014 13:26
		Re: [GMCnet] Lug nut / Wheel nut Torque By: emerystora on Wed, 14 May 2014 13:34
		Re: [GMCnet] Lug nut / Wheel nut Torque By: USAussie on Wed, 14 May 2014 18:18
		Re: [GMCnet] Lug nut / Wheel nut Torque By: GMC.LES on Wed, 14 May 2014 21:40
		Re: [GMCnet] Lug nut / Wheel nut Torque By: Ken Burton on Thu, 15 May 2014 01:09
		Re: [GMCnet] Lug nut / Wheel nut Torque By: Loffen on Thu, 15 May 2014 02:24
		Re: [GMCnet] Lug nut / Wheel nut Torque By: Ken Burton on Thu, 15 May 2014 02:49
		Re: [GMCnet] Lug nut / Wheel nut Torque By: Matt Colie on Thu, 15 May 2014 07:31
		Re: [GMCnet] Lug nut / Wheel nut Torque By: Ken Burton on Thu, 15 May 2014 02:53
		Re: [GMCnet] Lug nut / Wheel nut Torque By: jim kanomata on Fri, 16 May 2014 20:59
		Re: [GMCnet] Lug nut / Wheel nut Torque By: Bob de Kruyff on Sun, 11 May 2014 09:42
		Re: [GMCnet] Lug nut / Wheel nut Torque By: Carl S. on Wed, 14 May 2014 21:22
		Re: [GMCnet] Lug nut / Wheel nut Torque By: Carl S. on Wed, 14 May 2014 21:35
		Re: [GMCnet] Lug nut / Wheel nut Torque By: USAussie on Wed, 14 May 2014 21:42
		Re: [GMCnet] Lug nut / Wheel nut Torque By: A Hamilto on Wed, 14 May 2014 22:19
		Re: [GMCnet] Lug nut / Wheel nut Torque By: GMC.LES on Thu, 15 May 2014 07:37
		Re: [GMCnet] Lug nut / Wheel nut Torque By: kingd on Thu, 15 May 2014 13:17
		Re: [GMCnet] Lug nut / Wheel nut Torque By: dgsav on Thu, 15 May 2014 13:37
		Re: [GMCnet] Lug nut / Wheel nut Torque By: kingd on Thu, 15 May 2014 19:38
		Re: [GMCnet] Lug nut / Wheel nut Torque By: A Hamilto on Fri, 16 May 2014 20:34
		Re: [GMCnet] Lug nut / Wheel nut Torque By: USAussie on Fri, 16 May 2014 20:51

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