Allison Transmission 1000 & 2000 Product Families 4th Controls MT4007EN Troubleshooting Manual

(5) Chock the wheels and take any other steps necessary to keep the vehicle from moving.

3. With the engine running, remove the dipstick from the tube and wipe clean.

4. Insert the dipstick into the tube until it stops. Then remove it. Check fluid level reading. Repeat the check procedure to verify the reading.

NOTE: Safe operating level is within the “HOT RUN” band on the dipstick Figure 2–1 and Figure 2–2. The width of the “HOT RUN” band represents approximately 1.0 liter (1.06 quart) of fluid at normal operating sump temperature.

5. If the fluid level is not within the “HOT RUN” band, add or drain as necessary to bring the fluid level to within the “HOT RUN” band. d. Consistency of Readings. Always check the fluid level at least twice, with the engine running. Consistency (repeatable readings) is important to maintaining accuracy of the readings. If inconsistent readings persist, check the transmission breather to be sure it is clean and unclogged. If readings are still inconsistent, contact your nearest Allison distributor or dealer.

2–5. KEEPING FLUID CLEAN Prevent foreign material from entering the transmission by using clean containers, fillers, etc. Lay the dipstick in a clean place while filling the transmission.

CAUTION: Containers or fillers that have been used for antifreeze solution or engine coolant must NEVER be used for transmission fluid. Antifreeze and coolant solutions contain ethylene glycol which, if put into the transmission, can cause the clutch plates to fail.

2–6. FLUID RECOMMENDATIONS CAUTION: DEXRON®­VI is restricted to 1000/2000 transmissions beginning with serial number 6310670488.

Hydraulic fluids (oils) used in the transmission are important influences on transmission performance, reliability, and durability. Only fluids meeting TES 295, TES 389, DEXRON®­III, or DEXRON®­VI fluid specifications are acceptable for use in 1000 and 2000 Product Families transmissions.

TranSyndTM is a full synthetic transmission fluid developed by Allison 25