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Yukon Denali
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Section 499 (Automatic Transmission - 4L80-E/4L85-E (Troubleshooting))
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Troubleshooting
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No Torque in Reverse and Third
No Torque in Reverse and Third
WARNING:
This page is about a different car, the 2004 GMC Yukon XL, 2004 Chevrolet Suburban, and 2004 Chevrolet Avalanche. However, it is still accessible from the selected car via links, so may be relevant.
No Torque in Reverse and Third
Checks
Cause
Forward Clutch Hub (613)
The hub is broken.
Snap Ring (616a)
The ring is not seated.
Forward Clutch Housing (602)
The housing is broken.
Direct Clutch Piston (619)
The piston is broken.