Vauxhall Workshop Service and Repair Manuals > Astra J > Transmission/Transaxle | Automatic Transmission- 6T30 / 6T40 / 6T45 | Other Information | Harsh or Late First, Second, Third, and Fourth Shift

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).