WORKHORSE CUSTOM CHASSIS
Service Manual
2007 W Series
SECTION
7.2
PAGE
474
Automatic Transmission – Allison
2007 W Series Chassis
© 2006 Workhorse Custom Chassis — All Rights Reserved
WSM082106
FLUID LEAKS FROM FLUID FILL TUBE AND/OR
VENT
Condition
Action
Dipstick loose
Tighten the cap. Replace the cap if necessary.
Fluid level too high
Drain the fluid to the proper level. Refer to Transmission Fluid Checking
Procedure.
Fluid level too low
Add fluid to the proper level. Refer to Transmission Fluid Checking
Procedure.
Breather stopped up - clogged
Clean or replace the breather.
Dipstick or fill tube seal worn
Replace the seals or dipstick.
Incorrect dipstick marking
Calibrate the dipstick.
Fluid contaminated with engine coolant or water
Drain and replace fluid. Locate and fix source of additional fluid. Refer to
Transmission Fluid Checking Procedure and Automatic Transmission Fluid/
Filter Replacement.
FLUID LEAKS FROM TRANSMISSION INPUT
Condition
Action
Torque converter seal leaks
Replace the torque converter seal. Refer to Seal Replacement - Torque
Converter .
Front support bolt seals leaking
Replace the bolt seals. Refer to Torque Converter Housing Bolt Seal
Replacement .
Converter leaks
Inspect the converter seals, cracked converter pump tangs, converter cover,
or converter housing porosity. Replace the parts as required.
Spin-on filter leaking
Replace the filter. Refer to Automatic Transmission Fluid/Filter Replacement.
Main pressure plug leak
Replace or torque the main pressure plug. Refer to Oil Pressure Test Plug
Replacement.
Pump bushing shows excessive wear
Rebuild and repair the pump.
