Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Service Info Regarding Auto Trans Air Check Process (99-T-56)
Reference number: 99-T-56
Supersedes refnos: 99-07-30-026
SERVICE INFO REGARDING AUTO TRANS AIR CHECK PROCESS
TECHNICAL SERVICE BULLETIN
SERVICE INFORMATION REGARDING AUTOMATIC TRANSAXLE AIR CHECKING PROCEDURES
Model(s): 1991-97 Saturn S-Series
Group/Seq. No.: Transaxle-08
Corporation No.: 99-07-30 026
Bulletin No.: 99-T-56
Date: November, 1999
VEHICLES AFFECTED
1991 - 1997 Saturn S-Series vehicles equipped with MP6 or MP7 automatic transaxles
PURPOSE
When diagnosing a shiftability concern that involves a possible hydraulic leak in a clutch circuit, it may be necessary to perform an air check. This bulletin provides detailed information for use when an air check is required to help in determining the source of any leakage that may exist. The information in this bulletin is contained in the 98-99 and 2000 Automatic Transaxle Service Manuals.
PROCEDURES
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.
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