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Home >> GMC >> 2006 >> Sierra 1500 HD, RWD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 37 (Automatic Transmission - ALLISON - Service, Diagnosis & Troubleshooting) >> Fluid Leaks from Transmission Output

Fluid Leaks from Transmission Output

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Fluid Leaks from Transmission Output

Condition Action
Faulty or missing seal at output flange/yoke Install a new seal assembly in the transmission rear cover. Refer to Seal Replacement - Rear Propshaft .
Machine lead on output flange/yoke seal surface Replace the flange/yoke. Refer to Output Flange/Yoke Replacement .
Rear cover porosity Repair or replace the cover.
Flange/yoke worn at seal surface Replace the flange/yoke. Refer to Output Flange/Yoke Replacement .
Insufficient sealant around seal OD Install a new seal assembly in the transmission rear cover. Refer to Seal Replacement - Rear Propshaft .
Damaged or missing output bolt washer seal Replace the output bolt sealing washer. Refer to Output Flange/Yoke Replacement .
Damaged, missing, or loose output flange bolt Replace and/or torque the output flange bolt. Refer to Output Flange/Yoke Replacement .
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