Harsh or Late First, Second, Third, and Fourth Shift

WARNING: This page is about a different car, the 2019 Buick Cascada, 2018 Buick Cascada, and 2017 Buick Cascada. However, it is still accessible from the selected car via links, so may be relevant.

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).

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).