Harsh, Soft, Delayed or Slipping Second or Sixth 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 2-6 clutch regulator valve (334) and spring (326). Inspect for damaged or sticking #6 ball check valve.
Control Valve Solenoid Body (314)	Pressure Control Solenoid 4 commanded/failed LOW (off) or leaking - Perform solenoid valve assembly function test. Refer to Control Solenoid Valve and Transmission Control Module Assembly Solenoid Performance Test . Incorrect or inadequate adapt activity - Perform Reset Transmission Adapts .
Center Support (67)	Inspect for proper installation of the 2-6 clutch return spring retaining ring (455). Inspect for damaged 2-6 clutch piston assembly (457), spring (456), retaining ring (455), and center support assembly (459). Inspect for worn or damaged 2-6 clutch plates (451 - 453).
Automatic Transmission Fluid Pump Cover (219)	Inspect for damaged, stuck, sticky pressure regulator valve (233) and springs (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).