Call Us 1-407-295-1221 or Email us
Our large inventory of OEM Allison Transmission Parts includes
a large line of new and rebuilt Allison automatic transmissions, and
Allison Automatic transmission cores. All transmission parts can be shipped
the same day in most cases. Call our Sales and Service Departments 1-407-295-1221 or Email
Troubleshooting Charts For Allison
Transmissions AT / MT (B) / HT / V
The troubleshooting information
contained in the following charts outlines the possible causes
of transmission conditions and their remedies. Several possible
causes are indicated; numbered items indicate suggested remedies
for the causes. For Sales and Service Call America's #1 Supplier
of OEM Allison Transmission Parts and Authorized Allison Dealer;
TransDiesel Toll-Free: 1-800-422-1220,
D - LEAKING OIL
Leaking Into Converter Housing
Engine crankshaft rear oil seal defective.
Replace crankshaft seal (refer to vehicle service manual).
Input charging pump lip-type seal defective.
Replace pump seal.
Input charging pump OD sealring defective.
Replace pump sealring.
Converter assembly weld cracked (non-repairable, welded
torque converter assembly.
Replace converter assembly.
Torque converter pump hub worn at seal area.
Replace torque converter pump hub. Note: Welded converter
assemblies are not repairable and must be replaced as
Fluid Leak at Output Shaft
Output flange seal faulty or missing.
Install new seal in rear of transmission housing.
Flange worn at seal surface.
Sealant around seal OD defective.
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