A/T - Noise Diagnosis Manual Update
Number 87-7-10 Date 1/87Subject: 1987 SERVICE MANUAL UPDATE - NOISE DIAGNOSIS
6000, SUNBIRD, GRAND AM AND FIERO MODELS EQUIPPED WITH THM 125C TRANSAXLE
Noise diagnosis supplement for the 1987 THM 125C Automatic Transaxle Service Manual, Hydraulic Diagnosis Section.
Service Action
^ Before diagnosing the transaxle for a noise related condition, verify presence of noise in relation to drive range, vehicle speed, and engine RPM. Make certain the noise condition is not external to the transaxle. Refer to the Noise and Vibration Analysis Procedure, Section 7A of the Service Manual.
^ Check for loose or misaligned components within the engine compartment which could contact the engine or transaxle during engine roll (engine torque movement)..
THM 125C NOISE DIAGNOSIS:
THM 125 Noise Diagnosis:
THM 125C Noise Diagnosis:
THM 125C Noise Diagnosis:
^ Follow the preliminary check procedure as outlined in the oil pressure chart included in the THM 125C hydraulic diagnosis section.
Carefully Note
- Transaxle fluid level
- Condition of fluid (including presence of bubbles or contaminants on fluid level indicator)
- Oil pressures as listed