How can I check my Allison Transmission light?
How can I check my Allison Transmission light?
Use the Intelletect switch if you have one. Start by verifying 12.0-14 VDC at the TWO transmission fuses in your chassis fuse box. Like any computer, low voltage due to bad battery, discharged battery, poor or corroded connection, etc can cause some peculiar issues. Next, query your Allison for diagnostic codes using your shift pad.
Why is the do not shift light on my Allison not working?
It could be a problem with power supplied to either the trans ecu or the shifter. Suggest you call Allison service for help how to correctly check for power and ground. the Allison is all electronic and will not work when voltage drops too low less than 10 volt .If you can verify you have the power you can dig further.
Why does my Allison Transmission go into limp mode?
This is a different shift table that allows the transmission to protect itself from catastrophic failure. You should always assume that this isn’t “bogus” and try and get your transmission. This limp mode locks the transmission into third gear, and keeps the torque converter from locking up. It also keeps the transmission from going into reverse !
What to do if your shift selector light is not working?
1. Disconnect the wiring connector from the original transmission mounted PNP switch. 2. Connect the new switch to the wiring connector. 3. Return to Step #4 above and observe the display as you rotate the switch. If all positions indicate properly, refer to the Correction section below.
1. Disconnect the wiring connector from the original transmission mounted PNP switch. 2. Connect the new switch to the wiring connector. 3. Return to Step #4 above and observe the display as you rotate the switch. If all positions indicate properly, refer to the Correction section below.
Why is the reverse blinking on my Allison?
Garage temp was about 40*F when I backed it out. Outside temp right about -5*F. Drove the truck about 20 miles to pick up a water heater. When I got to the warehouse location, I tried to turn around in the parking lot and had no reverse whatsoever. The instrument panel indicator simply blinked the R continuously.
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
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.
