Clunking When Shifting
Clunking When Shifting needs a focused diagnosis because the same symptom can come from several different parts. Start with the checks that match when it happens, then verify the likely cause before replacing parts.
Check These First
Before diving into diagnosis, quickly verify these:
- 1Check transmission fluid level and condition if the vehicle has a serviceable dipstick.
- 2Note whether the problem happens cold, hot, towing, shifting into gear, or under load.
- 3Stop if there is a temperature warning, burnt smell, slipping, or loss of drive.
- 4Scan for transmission codes if available.
Most Likely Causes
Ranked from most to least common — start at the top.
Related Symptoms in Transmission
Other problems to check if this isn't your issue.
Fluid Leaks and Low Level Warnings
Fix SoonA hub for slow leaks, fluid warning lights, low levels, and driveway spots.
Transmission Fluid Leak Diagnosis
Fix SoonTransmission leaks should be traced by fluid color, drip location, pan/cooler line/seal wetness, and whether the level is low before driving.
Transmission Shift Problems
Fix SoonShift complaints include delayed engagement, no upshift, no downshift, stuck in gear, or harsh shifts. The checks start with fluid condition and continue to scan data and control faults.
Transmission Slipping Diagnosis
Fix SoonTransmission slipping, flares, shuddering, and loss of power should be narrowed by fluid level, gear behavior, temperature, and scan data.
Transmission Slipping and Gear Engagement
Fix SoonA hub for slipping, delayed engagement, high-gear flare, and transmission staying in one gear.