Skip to main content ↑ ↓
Topic: Allison Transmission Tips (Read 1453 times) previous topic - next topic
0 Members and 1 Guest are viewing this topic.

Allison Transmission Tips

Yahoo Message Number: 2121
How to check trans oil level without using dip stick.....

Using a pushbutton shift selector, simultaneously press the UP and DOWN arrow buttons.

A two-minute countdown begins when the following conditions have been met: Engine is at idle; Sump oil is at operating temp; Trans output shaft is stopped; Trans is in neutral; Oil level sensor is functioning properly.

Oil level will be displayed at the end of the two-minute countdown.
During the countdown, the display flashes and a count down occurs reducing by one digit every 15 seconds (8,7,6,5,4,3,2,1)
After two minutes, the shift selector displays the oil level data as in the following examples:

oLoK Fluid level is correct

o,L,L,o,1 or OL, LO,01 Fluid level 1 quart low o,L,H,I,1 or OL, HI,01 Fluid level 1 quart high

To exit, press Neutral

Displaying Diagnostic Codes:

Simultaneously press the UP and DOWN arrows twice.

If no codes are present it will display --
If codes are present, it will display up to five codes, newest first.

Using code 25 11 as an example:
Code list position: d1
Maincode: 25
Subcode: 11

The above will repeat. Press the MODE button to move onto the next older code.

To exit, press neutral.

Diagnostic codes can also be cleared.

Re: Allison Transmission Tips

Reply #1 –
Yahoo Message Number: 2125
In addition to Herb's great write-up, Allison has a video they offer that shows you this procedure plus how to drive with their World Transmission. I believe it was obtained for free.