Fluid Level and Condition

NOTE: The transmission and differential sump have a common oil sump with a communicating opening between the two.





The torque converter fills in both the P (Park) and N (Neutral) positions. Place the selector lever in P (Park) to be sure that the fluid level check is accurate. The engine should be running at idle speed for at least one minute, with the vehicle on level ground. This will ensure complete oil level stabilization between differential and transmission. The fluid should be at normal operating temperature (approximately 82°C or 180°F). The fluid level is correct if it is in the HOT region (cross-hatched area) on the dipstick (Fig. 1).

Low fluid level can cause a variety of conditions, because it allows the pump to take in air along with the fluid. As in any hydraulic system, air bubbles make the fluid spongy therefore, pressures will be low and will build up slowly.

Improper filling also can raise the fluid level too high. When the transaxle has too much fluid, the gears churn up foam and cause the same conditions that occur with a low fluid level.

In either case, the air bubbles can cause overheating, fluid oxidation, and varnishing. This can interfere with normal valve, clutch, and servo operation. Foaming also can result in fluid escaping from the transaxle dipstick, where it may be mistaken for a leak.

Along with fluid level, it is important to check the condition of the fluid. When the fluid smells burned, or is contaminated with metal or friction material particles, a complete transaxle overhaul is needed. Be sure to examine the fluid on the dipstick closely. If there is any doubt about its condition, remove the oil pan and inspect.