Harsh or Late First, Second, Third and Fourth Shift

Checks

Causes

Low-Reverse and 1-2-3-4 Clutch Housing (551)

Inspect for damaged or broken 1-2-3-4 Clutch Piston (552) and piston seals damaged, worn or leaking.
Inspect for fatigued or binding 1-2-3-4 Clutch Piston Return Spring (553).
Inspect for improper surface finish on 1-2-3-4 Clutch Plates (557-559). Refer to Clutch Plate Diagnosis .
Inspect for broken or fatigued 1-2-3-4 Clutch Waved Plate (557).
Inspect for plugged or restricted Low-Reverse and 1-2-3-4 Clutch Piston Housing (551) air bleed.

Case Assembly (50)

Inspect for leaking or loose fitting Fluid Check Valve (55).
Inspect for leaking or damaged 1-2-3-4 and Low-Reverse Clutch Fluid Passage Seals (67).