Truck Forums - Allison?

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montyburns

11-01-2007 08:28 PM

Allison?

I was wondering if my '02 has theautoAllison transmission. I have the 'HD with the 6.0 gas engine. A friend has a 2004 HD and he says he has the Allison. I'm guessing that I have the 4L80-E, the 4-speed auto. Is there a reference. I'd like to know the rear-end ratio as well. Thanks

Cracker

11-01-2007 08:30 PM

RE: Allison?

Alisons are behind the diesels only.
Rear end - provide VIN or last 3 digits from # in glovebox.

racethisz71

11-01-2007 08:31 PM

RE: Allison?

the allison only comes with the duramax or if you have a 8.1L so no u dont have it and your rea end is most likly 4.10s

Argon

11-02-2007 12:12 AM

RE: Allison?

give me your vin if you want,and i'll give ya the build sheet

04BLKCHEVY

11-02-2007 08:17 AM

RE: Allison?

My HD '04 has the 6.0 and I took it in to the dealer once cuz it was making a whistling noise from the tranny. When i got it back they told me it was a regular noise for those allison trannys. Maybe they told me some wrong info. As for the rear i have 4.10 gears front and rear.

Argon

11-02-2007 08:35 PM

RE: Allison?

the allison is not available with a 6.0 liter

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