Harsh, Soft, Delayed or Slipping First or Reverse Gear

WARNING: This page is about a different variant/trim than selected.

Checks	Causes
NOTE: On cold days, approximately 32°F (0°C) or colder, the transmission is designed to shift differently. The transmission uses a warm-up mode shift schedule until the engine reaches normal operating temperature. While the transmission is in warm-up mode, it is normal for transmission upshifts to be delayed or held longer. This feature improves heater performance by giving quicker vehicle warm-ups.
Automatic Transmission Fluid Pan (29)	Verify proper fluid level and condition, inspect transmission assembly for leaks.
Control Valve Upper Body (304)	Inspect for sticking, damaged, or worn 1-R/4-5-6 clutch regulator valve (327) and spring (326). Inspect for damaged or sticking #2 ball check valve. Inspect for damaged, worn, undersized or sticking #1 ball check valve.
Control Valve Lower Body (307)	Inspect for sticking, damaged, or worn clutch select valve 3 (352) and spring (353).
Control Valve Lower Body (307)	Inspect for sticking, damaged, or worn clutch select valve 2 (352) and spring (353).
Center Support (67)	Inspect for damaged or worn low and reverse clutch plates (463 and 465). Inspect for damaged low and reverse clutch backing plate (462). Inspect for worn splines on backing plate. Inspect for damaged low and reverse clutch backing plate retaining ring (461). Inspect for damaged low and reverse clutch piston assembly (470), spring (469), spring retaining ring (466), and center support assembly (459). Inspect for damaged low clutch sprag assembly (467). Holding the sprag assembly with the retaining ring facing up, and the inner race of the sprag assembly fixed, the outer race should freewheel counterclockwise. Inspect for cut, worn, or damaged low clutch sprag seal (468).
Control Valve Solenoid Body (314)	Perform solenoid valve assembly function test. Control Solenoid Valve and Transmission Control Module Assembly Solenoid Performance Test . Incorrect or inadequate adapt activity - Perform Reset Transmission Adapts procedure.
Automatic Transmission Fluid Pump Cover (219)	Inspect for damaged, stuck, sticky pressure regulator valve (233) and spring (234 and 235). Inspect for damaged, stuck, sticky isolator valve (236) and sleeve (237).
Center Support Fluid Passage Seal (20)	Inspect for worn, cut, or damaged seals. Inspect for proper seal (20) size (6L45/50E MYA/MYB) vs (6L80.90E MYC/MYD).