Attention! Unsatisfactory operation of the automatic transmission may be caused by poor engine performance, improper adjustment, hydraulic and mechanical failure, or interruptions in the operation of the processor unit.
Preliminary checks
1. Warm up the transmission by driving.
2. Check the fluid level.
- a) If the level is below normal, restore the level by adding fluid, then locate the leaks.
- b) If the level is above normal, remove excess fluid and check the condition of the drained fluid. The presence of engine coolant in the transmission fluid indicates that the radiator is not tight.
- c) If the fluid foams, replace the fluid, check for traces of engine coolant in the transmission fluid, or monitor the level, an increase in which will indicate that engine coolant has entered the transmission.
3. Check the engine idle speed.
Attention! If the engine runs intermittently, find out the cause and fix it.
4. Check the condition of the throttle cable. Adjust the cable if necessary.
Caution! The throttle cable may not operate properly when the engine is warm. Check its operation on a cold and warm engine.
5. Check the smooth running of the gear shift rod and the rod adjustment.
Checking the condition for liquid leakage
6. A fluid leak is easily identified by its dark red color and is eliminated by replacing the seals or gaskets. To detect a noticeable leak, park the car after driving for several kilometers over a clean sheet of cardboard or paper. After about 2 minutes, the leak can be detected. If the leak is weak, thoroughly clean the crankcase and check the sealing areas after driving.
5. If the leak location is identified, determine the cause of the leak and the repair method (for example, replacing the gasket cannot eliminate a leak if the separating surfaces are deformed).
6. Before fixing a leak, analyze the causes of the leak and determine the nature of the repair work, since many types of repairs cannot be done independently.
7. Leakage from under the gasket may be a result of increased pressure or fluid level due to clogged ventilation holes, deformation of the pan or its split plane, non-compliance of the sealant brand used with the recommended one, or defects in the pan casting. Periodically check the tightness of the seal of the indicator pipe and the speedometer reducer.
8. Leakage from under the seal may be caused by increased pressure or fluid level due to clogged ventilation holes, improper installation of the seal, damage to the sealing journal of the shaft or wear of the shaft bearing.
9. Crankcase leakage is caused by casting defects. Check the reliability of the liquid cooler hoses.
10. A leak from the breather or filler pipe indicates overfilling of the transmission, ingress of coolant, porosity of the crankcase material, incorrect position of the indicator, clogging of ventilation and drainage channels.
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