Automatic transmission hydraulic fluid level check (every 3000 miles or 3 months) (Chevrolet Lumina 1 1989-1994: General information: Maintenance)

1. Maintain the hydraulic fluid level in the automatic transmission at all times. A low fluid level can cause slippage or loss of torque, while an overflow can cause foaming and leakage of the hydraulic fluid.

2. With the parking brake on, start the engine, then shift the gear selector through all ranges, ending in the park position. The hydraulic fluid level should be checked with the vehicle level and the engine running at idle.

Note. If the vehicle has previously been driven at high speeds for a long time in hot weather, city driving, or towing a trailer, incorrect hydraulic fluid level readings may be obtained. Wait for the liquid to cool (approximately 30 minutes).

3. When the transmission has warmed up to normal operating temperature, remove the dipstick from the fill tube. The dipstick is located at the rear of the engine compartment (see illustration).

6.3. The automatic transmission hydraulic fluid level dipstick is located at the rear of the engine compartment

4. Gently touch the liquid on the end of the dipstick to determine if it is cold or hot. Wipe off any fluid on the dipstick with a clean cloth and reinsert it into the tube until the plug snaps into place.

5. Remove the dipstick again and check the fluid level.

6. If the fluid feels cold to the touch, the level should be approximately 1/8-3/8" below the mark "ADD 1 RT" ("Add 1 pint") (see illustration). If the liquid feels warm to the touch, the level should be close to the mark "ADD 1 RT". If the liquid is hot, the level should be within the shaded area. If topping up is required, pour it directly into the tube using a funnel. In order to raise the level from the mark "ADD" to the top of the shaded area when the gearbox is hot, approximately 1 pint is required (0.5 l) hydraulic fluid, so add fluid in small amounts and check the level regularly.

6.6. The hydraulic fluid level in an automatic transmission should be maintained within the shaded area on the dipstick (between top and bottom holes)

7. Along with the level, it is also necessary to check the condition of the hydraulic fluid. If the fluid on the dipstick is dark reddish brown or "burnt" smell, it should be replaced. If you are in doubt about the condition of the hydraulic fluid, purchase a new one and compare it with the one used for color and smell.