14. Install the drain plug and gasket, and tighten the
plug 15 to 20 lbf·ft (20 to 27 N·m).
15. Replace the external (auxiliary) fluid filter.
16. Clean the area around the fill tube and remove
the dipstick. Using a clean funnel in the fill tube,
add transmission fluid. See
for approved
automatic transmission lubricants, and
for AT/MT series lubricant capacities.
17. Check and adjust the fluid level using the proce-
dure under "Allison Transmission Fluid Level
Checking."
Approved Lubricants, Allison Transmissions
*
Lubricant Type
Temperature
Dexron III ATF
–25° to +120°F (–32° to +48°C)
TranSynd
Synthetic ATF
–25° to +120°F (–32° to +48°C)
*
Factory filled with Dexron III. For off-highway operation or where ambient
temperature is consistently above +86°F (+30°C) or below –25°F (–32°C),
see the manufacturer’s fluid recommendations.
Table 3, Approved Lubricants, Allison Transmissions
f260132a
1
2
3
4
5
6
7
8
9
10
10/05/94
1.
Fluid Intake Tube
2.
Detent Spring
3.
Detent-Spring 1-3/4" Bolt
4.
Filter Spacer
5.
2-1/4" Bolt (16 qty.)
6.
First/Reverse Clutch Feed-Tube 3" Bolt (2 qty.,
behind)
7.
First/Reverse Clutch Feed Tube
8.
Governor Screen (in control valve body)
9.
Governor Pressure Tube
10. Governor Feed Tube
Fig. 4, Allison AT Series Transmission Governor
Transmission
26
School Bus Chassis Maintenance Manual, March 2003
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