What transmission does a 2001 Chevy 2500hd have?
It is teamed with a standard 5-speed manual transmission — except for LT models, which feature a standard GM-built 4L80 4-speed automatic (optional with the 6.0-liter and lesser trims).
Which GM trucks have Allison Transmission?
Chevrolet Kodiak/GMC Topkick. GMC Sierra. Hummer H1. Chevrolet B-Series.
What transmission does a 2002 Chevy Silverado 2500HD have?
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| Engine | 6.0L V-8 |
|---|---|
| Seating | 3 Passengers |
| Transmission | 5-spd man w/OD |
| Power | 300 @ 4400 rpm |
| Drivetrain | rear-wheel |
Are there problems with 2001-2002 Allison transmissions?
Enter your ride HERE to be a part of this months Ride of the Month Challenge! I’m looking at a 2002 model with about 42k miles. It looks to be in great shape. My mechanic (who owns the same vehicle in an 03) told me that the 01-02 Allison’s are “notorious” for having problems.
Can you tell the difference between A 2500HD and an ally 4×4?
I had a 2500HD 4×4 w/ 8100 & Ally for a few years and have owned a 2500 4×4 Sub w/ 8100 & 4L85e for over a decade. I eventually had the ecm in the truck tuned and had torque management removed, and it was definitely noticeble on the bottom end (couldn’t tell a difference in mpg).
What kind of pulling power does an Allison 8.1L have?
TM has little to do with pulling power, mostly for the transmission shifting and smoothness. In defense of the 8.1L, it is a decent long life engine that gave reasonable pulling power for Suburbans and pickups in the gasser class. Mine had the famous CSK and oil consumption even though it was pampered from the beginning.
What’s the mileage on an Allison 8.1 diesel?
If it run the motor at a lower RPM than the 4L80 does in 4th gear then its even farther out of the TQ curve. Mine runs about 2200 RPM at 75 MPH. When it kicks down a gear and jumps to 3000 RPM it pulls like a pig. If the ally would put it down at 1800 RPM it would shift even more and likely get worse mileage.