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Posted on Jan 02, 2017
Make sure you have the proper amount of tranny fluild in it and get that Valvoline fluid out of it. Allison transmissons have there own type of tranny fluid and you want to use it. You can buy the right stuff from a Allison dealer. Most Detroit Diesel dealers are also Allison dealers. Look them up in your phone book and they will tell you the quanity and sell you five gallon pails of the fluid. Just get the serial number off of the side of the transmisson before you call. Change the fliters again too. Believe me, this is important. My company has Yard horses with Allison transmissions and you don't want to screw with the small stuff. Service them right and they work as hard as you want.
Posted on Aug 09, 2009
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This is part of the new Allison Prognostics. It's very similar to the oil life monitor on the new cars.
The way to clear the filter light after the filter is changed is to:
Turn the ignition on, but do not start the truck
Next move the shift selector in this sequence, N-D-N-D-N-R-N, do not stop the sequence for more than 3 seconds once you start.
This should turn off the filter light.
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