Not in gear

Select D, DRIVE.

Low fluid level, aerated fluid

Add fluid to the proper level. Refer to Transmission Fluid Check.

Faulty torque converter

Replace the torque converter. Refer to Torque Converter Replacement.

Incorrect torque converter

Replace the torque converter. Refer to Torque Converter Replacement.

Clutch pressure low

Refer to Low Main Line Pressure in Specific Ranges, Normal Pressure in Other Ranges.

1-2-3-4 clutch or Low and Reverse clutch or 2-6 clutch slipping

Use the diagnostic tool to measure turbine speed.

Rebuild the 1-2-3-4 clutch or the Low and Reverse clutch or the 2-6 clutch.

Higher power engine

Confirm proper engine match.