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2017
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XTS Base
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Repair and Diagnosis
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Transmission
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Automatic Trans
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Automatic Transmission - 6T70 (M7U M7W), 6T75 (M7V), Or 6T80 (Mhm) - Diagnostic Information And Procedures
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Diagnostic Information and Procedures
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Harsh or Late Second and Sixth Shift
Harsh or Late Second and Sixth Shift
Checks
Causes
2 - 6 Clutch Assembly
Inspect for worn or improper surface finish on the 2 - 6 Clutch Plates (446, 447) and Backing Plate (448)
Inspect for fatigued 2 - 6 Clutch Piston Cushion Spring (445)
Case Cover Assembly (403)
Inspect for damaged or broken 2 - 6 Clutch Piston (405) and piston seals damaged, worn or delaminating
Inspect for fatigued 2 - 6 Clutch Piston Return Spring (406)