Allison Transmissions FAQs

[FlaMan]

 

I was reading some of the FAQs on the Allison Website today, (Allisontransmissions.com) and I noticed a question about tires. I notice a lot of you guys like to put bigger tires on your trucks, so I thought I would throw this in. The question was, "If I put 285's on my GM truck, will it affect the shifting of my Allsion tranny?" The answer was...."We have noted that a GM truck with 285's on it does not usually ever shift to 5th range when towing a load." Apparently, the tires DO make a difference. I would not have thought that, so I learned something today. That website is a wealth of information. No guesswork, just the right answers! I like that! Go there and read it. Click on the part that says "Info on your GM truck". Have fun!!

[rmk800ak]

had 285's on my 2003HD with a 8.1 and never had a problem with it and I pull a 5000 pound enclosed trailer all the time

[BlackSilver]

had 285's on my 2003HD with a 8.1 and never had a problem with it and I pull a 5000 pound enclosed trailer all the time

 

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5,000# isn't much of a load for these trucks. Heck, a 1500 is rated for more than that.

[Supercop8100]

I tow 12000lbs all the time and sometimes more, I have never had a problem with it. Michelin 285/75/16, LTX M/S.

[k3500]

I would hope the Allison TCM could adapt to some larger tires, 265/285 and such. Does anyone know of a programmer which allows the user to modify tcm settings?

[Haulin' 8.1]

Well I've had that issue towing with 265's. Stays out of O/D unless it's a long gentle down slope, that's doing 65-70.

 

Vernon

[lovette]

No problem here with 285/75/16's.

 

Don't the SRW 3500's come with 265/75/16's stock?

[jake111]

No problem here with 285/75/16's. 

 

Don't the SRW 3500's come with 265/75/16's stock?

 

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Yes. LT265/75-16E on 7" rims but spare is 6.5"