No Ally for 2500 Sub or Avalanche

N900WM · January 20, 2005

Can someone explain to me why the Allison transmission is not offered in the 2500 Suburban or Avalanche?

I love my Allison/8.1L combination. But wish I could get it in something other than a pick-up. I would think it would be an awsome combination.

What am I missing?

Frank S · January 20, 2005

It won't fit.

The 2500 Suburban and Avalaches do not have the 2" increased frame height and the transmission can not be tucked under the vehicle.

Ag Teacher · January 20, 2005

No need for it. The 4 speed auto can handle any trailer that's going to be behind a suburban or an avalanche. The ally would just increase the cost and be overkill for a vehicle only rated to tow 10 or 12K pounds max.

N900WM · January 20, 2005

No need for it. The 4 speed auto can handle any trailer that's going to be behind a suburban or an avalanche. The ally would just increase the cost and be overkill for a vehicle only rated to tow 10 or 12K pounds max.

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My truck is rated for 12,000lbs. max? And I don't consider it overkill.

I can understand the fitment issue.

HD for me · January 21, 2005

Can someone explain to me why the Allison transmission is not offered in the 2500 Suburban or Avalanche?

I love my Allison/8.1L combination. But wish I could get it in something other than a pick-up. I would think it would be an awsome combination.

What am I missing?

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CANT GET THE 8.1L OR THE DURAMAX IN THOSE EIGHTER CAN YOU

linda · January 21, 2005

the 8.1 is available in the Avy for sure, i think its detuned a few horses though i cant say positively. I am fairly sure the 8.1 is available in the burb too.

Bgdsub72 · January 21, 2005

Can someone explain to me why the Allison transmission is not offered in the 2500 Suburban or Avalanche?

I love my Allison/8.1L combination. But wish I could get it in something other than a pick-up. I would think it would be an awsome combination.

What am I missing?

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CANT GET THE 8.1L OR THE DURAMAX IN THOSE EIGHTER CAN YOU

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8.1 is avail in the suburban/yukon XL

whitesnake01 · January 22, 2005

No need for it. The 4 speed auto can handle any trailer that's going to be behind a suburban or an avalanche. The ally would just increase the cost and be overkill for a vehicle only rated to tow 10 or 12K pounds max.

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No need? I have both 4 and 5 speed, BB and DMAX, and I can tell you a DMAX/ALY suburban would be a good idea (just like a PS Excursion). Not sure I understand the cost point either. A loaded suburban is over 50K. Whats another 10%?

N900WM · January 24, 2005

No need for it. The 4 speed auto can handle any trailer that's going to be behind a suburban or an avalanche. The ally would just increase the cost and be overkill for a vehicle only rated to tow 10 or 12K pounds max.

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No need? I have both 4 and 5 speed, BB and DMAX, and I can tell you a DMAX/ALY suburban would be a good idea (just like a PS Excursion). Not sure I understand the cost point either. A loaded suburban is over 50K. Whats another 10%?

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I hope GM is listening.

Ag Teacher · January 24, 2005

No need for it. The 4 speed auto can handle any trailer that's going to be behind a suburban or an avalanche. The ally would just increase the cost and be overkill for a vehicle only rated to tow 10 or 12K pounds max.

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No need? I have both 4 and 5 speed, BB and DMAX, and I can tell you a DMAX/ALY suburban would be a good idea (just like a PS Excursion). Not sure I understand the cost point either. A loaded suburban is over 50K. Whats another 10%?

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What I was saying is that for a 10,000 pound trailer, the 4 speed is enough transmission. Sure, you could pull a 16,000 pound trailer if you had the allison, but GM on rates the pickups to pull that weight only if its a gooseneck/fifth wheel. I don't think any one is going to pull a fifth wheel with a suburban and for a bumper trailer, the max is still only 10K or 12K max. For the 10 - 12000 pound trailer, the 4 speed gets the job done.

I'll agree that the ally would be nice, but from GM engineers stand pound, they look at the max trailer and match a transmission based on it maximum specs. The 4 speed meets the spec and is cheeper so that's what they go with.

2001bigblockburban · January 24, 2005

Almost bought a Powerjoke Excursion but couldnt have standed seeing a Ford in my driveway everyday. So got the 8.1 burban. Would LOVE to see a D/A in the burbans. (still love my 8.1)

2001bigblockburban

jeb · January 24, 2005

Almost bought a Powerjoke Excursion but couldnt have standed seeing a Ford in my driveway everyday. So got the 8.1 burban. Would LOVE to see a D/A in the burbans. (still love my 8.1)

I actually went to the Excursion from my dmax/ally CC HD2500 because I wanted a diesel 'burb. A bad PSD had ford buying the truck back and I'm back in a gas Yukon XL. If I'd have had the choice of a dmax/ally in a burb in the first place, I'd have never gone to Ford. I wouldn't have gotten the HD2500 either, for that matter.

Having driven two HD 5 speed trannys in both the HD2500 and the Excursion, I'd love to see the ally in my Yukon. Great tranny.

Chris97K1500 · January 25, 2005

I'm pretty sure someone posted a Burb with a D/A. It was shown a SEMA or something. I could be mistaken but I thought Lyndon did a custom tune for it. They didn't modify anything for it to fit if I remember correctly. Maybe someone knows for sure. I'll bet the "Next" generation chassis will have a D/A option in a 2500 Burb/Avalanche. Although with Ford dropping the Excursion, GM may take note and not even have the option. Chris

whitesnake01 · January 25, 2005

What I was saying is that for a 10,000 pound trailer, the 4 speed is enough transmission.

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We just have to agree to disagree. Enough is in the eye of the beholder. I want every gear they can give me. I want all the power they'll support with a warranty. Yes, a 4 speed is a nice step up from a 3 speed of yesterday. I am sure there were those who said the 4sp was only needed in a sports car. Now we laugh if a sports car does not have 6sp. A 4sp auto is lame for towing. Lets face it. We only accept it because that is all they want to sell us. By a show of hands, who'd go for a 6sp Ally if it was available?