Can you get an Allison Transmission with a gas engine?
Can you get an Allison Transmission with a gas engine?
Allison Automatics are perfectly suited to natural gas engines, both compressed natural gas (CNG) and liquefied natural gas (LNG), in a wide range of applications. Allison’s patented torque converter technology multiplies engine torque to significantly improve startability and launch, even on steep grades.
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.
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.
Is the Allison 4L85E a good transaxle?
The 4L85Es can withstand a lot of power and are overall a good trans proven through many years. If I remember correctly about torque managment. TM has little to do with pulling power, mostly for the transmission shifting and smoothness.
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 transmission does a GM 8.1L have?
The engine was only ever been offered mated to General Motor’s 4L85E four speed automatic transmission – a manual transmission rendition was never offered. When broken down, GM’s 8.1L is largely a stroked out version (4.00″ vs 4.37″) of the company’s 7.4L Vortec V-8, which was retired in favor of the 496 cubic inch behemoth.
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.
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.
When did the Allison 6 speed transmission come out?
We are unaware of the 6-speed Allison transmission before the 2007 model year. Recently Banks installed the cat-back version of their single-exhaust system on our rig, at 50K+ miles.
