Harsh First and Reverse Shift

WARNING: This page is about a different car, the 2017 GMC Acadia. 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 plugged or restricted Low-Reverse/1-2-3-4 Clutch Piston Housing (551) air bleed
Low and Reverse Clutch	Inspect for improper surface finish on Low and Reverse Clutch Plates (545-547) Inspect for broken or fatigued Low and Reverse Clutch Apply Plate (547) Inspect for damaged or broken Low and Reverse Clutch Piston (550) and piston seals damaged, worn or leaking Inspect for fatigued or binding Low and Reverse Clutch Piston Return Spring (549)