General Information
Important: For oil and filter change intervals, see the applicable Allison Operator's Manual.
For Allison Transmission Operators Manual and Warranty Information for on-highway vehicle applications, visit www.allisontransmission.com/my-allison/customer or scan the QR code. See Fig..
Fig. 1, Allison Transmission QR Code
When draining transmission fluid, check for evidence of dirt or water contamination. A small amount of condensation will appear in the fluid during operation.
Water contamination is normally characterized as a milky discoloration of the transmission fluid. Obvious contamination of the transmission fluid indicates a leak between the water and fluid areas of the transmission cooler. Inspect and pressure-test the cooler to confirm the leak; replace leaking transmission coolers.