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Will this really Damage the Alison Tranmission?

VRMMMM

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VRMMMM Enthusiast

VRMMMM

Posted
Posted

I want a more aggressive look for my truck and the little 6.5X16 wheels and 245 tires are just not cutting it for me.  I have heard that going to some big tires could damage the Transmission!   :crazy:

chevy4x4trucks Senior Enthusiast

chevy4x4trucks

Posted
Posted

I would upgrade to some 285's if I were you.  I wouldn't be concerned about any tranny issues w/ such a small tire size change.  Besides, your truck is built to tow thousands of pounds.  If that tranny can handle that stress I wouldn't be worried about running tires that are an inch taller.

SoMnDMAX Enthusiast

SoMnDMAX

Posted
Posted

I put about 10,000 miles on my 285's last summer, with no problems. I ran the gamut of possibles situations that could cause problems- 17,500 GCVW towing, empty, racing, pulling, etc. Never had any problems.

 

That bullitin GM has out is BS just like the "four wheel drive noise is normal" bulletin they have....  :angry:  :plainsmile:

CMNTMXR81 Senior Enthusiast

CMNTMXR81

Posted
Posted

The whole concept behind having a heavy duty Allison transmission is because it's nearly bulletproof.  A simple tire change isn't going to bring it to it's knees.

Jpshostr Senior Enthusiast

Jpshostr

Posted
Posted

The roots of this tranny go way back to trucks much larger than any of the ones that GM is putting it in.  You won't damage it by just running those size tires.

VRMMMM Enthusiast

VRMMMM

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Posted

I contacted GMC tech and was told it was only a problem with the Duramax engine.  Had to do with throwing of the shift pattern and could possible set an error code.  There is already a TSB out on it.

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