Automatic Transmission Diagnose By Symptom

Transmission Noisy, Other Than Valve Resonance

1. Check for gear noise to verify if within normal range.
2. Check linkage for proper adjustment, wear, or damage.
3. Check fluid for proper level and/or contamination.
4. If fluid level is low, add specified fluid to bring level within cross-hatched area at operating temperature.
5. If fluid is contaminated, disassemble, clean, and service transmission, flushing torque converter and cooler.
6. Perform Stall Test. If noise does not stop, proceed to step 7. If noise stops, proceed as follows:
   • Run transmission in all gears and check for noise.
   • If noise does not stop in any gear, remove speedometer gear and check for noise. If noise stops, replace speedometer gear.
   • If noise stops in Low and R only, service forward planetary and/or one-way clutch.
   • If noise stops in 2nd, High, and R only, service reverse planetary.
   • If noise stops in High only, service both planetary sets.

7. Check extension housing bushing, seal or propeller shaft.

_{Additional Information provided courtesy of ALLDATA DIY}

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