1000/2000/2400 Series
- Park the vehicle on a level surface and apply the parking brakes.
- Run the engine until the transmission fluid reaches the operating temperature of 160 to 200°F (71 to 93°C). Shift the transmission to neutral (N) and shut down the engine.
- Clean the area around the drain plug. Place a drain pan under the transmission and remove the drain plug. Examine the fluid while it drains. If only the filter is being changed, do not drain the fluid.
- Using a standard strap-type filter wrench, remove the filter by turning it counterclockwise.
- Remove the magnet from the filter attachment tube or from the top of the filter element.
- Clean any metal debris from the magnet. Then, install the magnet on the filter attachment tube.
- Using transmission fluid, lubricate the gasket on the filter.
- Using your hand, install the filter by turning it clockwise until the filter gasket contacts the converter housing or cooler manifold. Then, turn the filter one more complete turn.
- Install the drain plug and sealing washer. Tighten the plug 22 to 30 lbf·ft (30 to 40 N·m).
- Clean the area around the fill tube and remove the dipstick. Using a clean funnel in the fill tube, add transmission fluid. See Table. for approved transmission lubricants, and see Table. for lubricant capacities.
- Check and adjust the fluid level using the appropriate
Allison Transmission procedure, MOP Detroit® Automated Transmission Fluid Change and Magnetic
Plug Cleaning.
Table 1, Approved Allison Transmission Lubricants
Approved Allison Transmission Lubricants
Lubricant Type1
Temperature: °F (°C)
All Allison Transmissions
Castrol TranSynd™ (synthetic)
Above –22 (–30)
Dexron® III
Above –13 (–25)
- Lubricants listed in order of preference. Do not mix types of oil.
Table 1, Approved Allison Transmission Lubricants
Table 2, Allison Transmission Lubricant Capacities
Allison Transmission Lubricant Capacities
Transmission Model
Fill Capacity:1 qt (L)
On-Highway Transmissions
1000/2000/2400 Series (standard sump)
15 (14)
1000/2000/2400 Series (shallow sump)
13 (12)
HD/MD Series
HD4060/4560 (standard sump)
36 (34)2
HD4060/4560 (shallow sump)
26 (25)2
MD3060/3066/3560 (standard sump)
19 (18)
MD3060/3066/3560 (shallow sump)
10.5 (10)
- Quantities listed are approximate. Add the recommended amount of fluid as listed under fill capacity, then perform a "hot check" and add fluid as needed. Do not overfill.
- Add 3 quarts (3 liters) if equipped with a PTO.
Table 2, Allison Transmission Lubricant Capacities
Notice: To prevent dirt from entering the transmission, use only clean containers and fillers for the transmission fluid. Do not use fillers or containers that have been used for water or antifreeze. Dirt, water, or antifreeze could damage the transmission.
Note: A lot of fluid will drain when the filter is removed.