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.
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HOMESERVICE MANUALSHYUNDAI1991SONATA V6-3.0LREPAIR AND DIAGNOSISTECHNICAL SERVICE BULLETINSALL TECHNICAL SERVICE BULLETINSAUTO TRANSAXLE - FLUID LEVEL CHECKING PROCEDURE
1991 Hyundai Sonata V6-3.0L
Auto Transaxle - Fluid Level Checking Procedure
1991 Hyundai Sonata V6-3.0LSECTION Auto Transaxle - Fluid Level Checking Procedure
GROUP: Transaxle
NUMBER: 95-40-003
DATE: May, 1995
MODEL: All Vehicles With Auto Transaxles
SUBJECT:
Auto Transaxle Fluid Level Checking Procedure
CHECKING PROCEDURE:
FLUID LEVEL AND CONDITION
1. Place the vehicle on a level surface.
2. Before removing the dipstick, wipe all dirt from the area around the dipstick.
3. With the selector lever in "P" (Park) and the parking brake applied, start the engine.
4. The engine should be running at idle speed. Transaxle fluid should be at normal operating temperature (70-80° C) (158-176° F).
5. Push your foot on the brake pedal and move the selector lever to every position to fill the torque converter and hydraulic circuit with fluid, then place the lever in the "N" (Neutral) position. This operation is necessary to be sure that the fluid level check is accurate.
NOTE:
Transaxle fluid level must be checked in neutral.
6. Check to see if the fluid level is in the "HOT" range on the dipstick. If the fluid is low, add Hyundai Automatic Transaxle Fluid until the level reaches the "HOT" range. Low fluid level can cause a variety of conditions because it allows the pump to take in air along with the fluid. Air trapped in the hydraulic circuit forms bubbles which will aerate the fluid, causing pressure to be erratic.
When the transaxle has too much fluid, the gears churn up foam and may cause the same symptoms which occur with low fluid level, resulting in accelerated deteriorations of automatic transaxle fluid. In either case, air bubbles can cause overheating, fluid oxidation, and varnishing, which can interfere with normal valve, clutch and servo operation. Foaming can also result in fluid escaping from the transaxle vent where it may be mistaken for a leak.
Along with fluid level, it is important to check the condition of the fluid. When fluid smells burned, and is contaminated with metal bushing or friction material particles, a complete transaxle overhaul or replacement may be needed. Be sure to examine the fluid on the dipstick closely. If there is any doubt about its condition, drain out a sample to verify. After the fluid has been checked, seat the dipstick fully to seal out water and dirt.
NUMBER: 95-40-003
DATE: May, 1995
MODEL: All Vehicles With Auto Transaxles
SUBJECT:
Auto Transaxle Fluid Level Checking Procedure
CHECKING PROCEDURE:
FLUID LEVEL AND CONDITION
1. Place the vehicle on a level surface.
2. Before removing the dipstick, wipe all dirt from the area around the dipstick.
3. With the selector lever in "P" (Park) and the parking brake applied, start the engine.
4. The engine should be running at idle speed. Transaxle fluid should be at normal operating temperature (70-80° C) (158-176° F).
5. Push your foot on the brake pedal and move the selector lever to every position to fill the torque converter and hydraulic circuit with fluid, then place the lever in the "N" (Neutral) position. This operation is necessary to be sure that the fluid level check is accurate.
NOTE:
Transaxle fluid level must be checked in neutral.
6. Check to see if the fluid level is in the "HOT" range on the dipstick. If the fluid is low, add Hyundai Automatic Transaxle Fluid until the level reaches the "HOT" range. Low fluid level can cause a variety of conditions because it allows the pump to take in air along with the fluid. Air trapped in the hydraulic circuit forms bubbles which will aerate the fluid, causing pressure to be erratic.
When the transaxle has too much fluid, the gears churn up foam and may cause the same symptoms which occur with low fluid level, resulting in accelerated deteriorations of automatic transaxle fluid. In either case, air bubbles can cause overheating, fluid oxidation, and varnishing, which can interfere with normal valve, clutch and servo operation. Foaming can also result in fluid escaping from the transaxle vent where it may be mistaken for a leak.
Along with fluid level, it is important to check the condition of the fluid. When fluid smells burned, and is contaminated with metal bushing or friction material particles, a complete transaxle overhaul or replacement may be needed. Be sure to examine the fluid on the dipstick closely. If there is any doubt about its condition, drain out a sample to verify. After the fluid has been checked, seat the dipstick fully to seal out water and dirt.
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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.