Where is the TCM on a Allison transmission?
Transmission controller is located on the drivers side of the radiator shroud of all Duramax powered GM’s. This product may be added to any SPADE order, or purchased by anyone using an EFILive Flashscan V2 to tune their truck. Alternatively, a physical TCM module may be sent with payment of additional core charge.
How much power can an Allison 1000 handle?
Allison 1000, Six-Speed (‘07.5-’10) By the time the LMM-powered GMs hit the market, aftermarket tuning of the TCM had progressed enough to where the Allison could withstand 430 to 450-rwhp for extended periods of time—and 500-rwhp on occasion.
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.
Why does my Allison 5 speed have no reverse?
Try taking video with a camera/camera phone and show the video to the dealer to avoid the can not duplicate problem issue. Friday a 2002 d/a shows up at the shop with no reverse and a tcc code. Sorry, I wrote the code down and left it at the shop.
How many gears does an Allison truck have?
He works for a Detroit diesel/ Allison trans dealership and says GM dealers normally dont have an expert on hand check with a big truck dealer in your area. ….little known allison fact…some models come with 6 gears but the computer is programed to only use 5….hope some of this rambling helps ….Lorne