Ratemytranny -

Shifts should be firm but smooth. "Slipping" (engine RPMs rise but the car doesn't speed up) or "hunting" for gears indicates a failing unit.

Use an OBD-II scanner to check for "pending" or "stored" codes in the Transmission Control Module (TCM). No codes present. Solenoid Codes: Often a repairable electrical issue.

Poor. The fluid is oxidized. If it smells "burnt," there is likely internal friction material damage. ratemytranny

Good/Fair. The fluid is aging and should be scheduled for a change soon.

Rate the transmission based on how it behaves while driving: Shifts should be firm but smooth

Look for leaks where the driveshaft or CV axles meet the transmission. 3. Operational Performance

Whining, clunking, or grinding sounds while in gear are major red flags. 4. Diagnostic Scanning No codes present

Excellent. The fluid is fresh and lubricating properly.