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.
SYS.OK|MANUAL.DB● LIVE
HOMESERVICE MANUALSCHEVROLET1990LUMINA APV V6-191 3.1LREPAIR AND DIAGNOSISTRANSMISSION AND DRIVETRAINAUTOMATIC TRANSMISSION/TRANSAXLETESTING AND INSPECTIONSYMPTOM RELATED DIAGNOSTIC PROCEDURES2-3 SHIFT SOFT, SLIPS OR EARLY
1990 Chevrolet Lumina APV V6-191 3.1L
2-3 Shift Soft, Slips or Early
1990 Chevrolet Lumina APV V6-191 3.1LSECTION 2-3 Shift Soft, Slips or Early
1. Intermediate servo:
a. Piston to case oil seal damaged.
b. Servo piston damaged.
c. Servo bore in case damaged.
2. Accumulator exhaust check valve not seating in case.
3. Spacer plate:
a. Plugged or restricted direct clutch feed orifice.
b. Incorrect case cover gaskets.
c. Drive sprocket support passages interconnected, leaking or restricted.
d. Sleeve loose or out of position.
4. Direct clutch:
a. Check ball leaking.
b. Check ball capsule damaged.
c. Damaged or missing seals.
d. Cracked or damaged housing or piston.
e. Missing or incorrect apply ring.
f. Wrong number of clutch plates.
a. Piston to case oil seal damaged.
b. Servo piston damaged.
c. Servo bore in case damaged.
2. Accumulator exhaust check valve not seating in case.
3. Spacer plate:
a. Plugged or restricted direct clutch feed orifice.
b. Incorrect case cover gaskets.
c. Drive sprocket support passages interconnected, leaking or restricted.
d. Sleeve loose or out of position.
4. Direct clutch:
a. Check ball leaking.
b. Check ball capsule damaged.
c. Damaged or missing seals.
d. Cracked or damaged housing or piston.
e. Missing or incorrect apply ring.
f. Wrong number of clutch plates.
RENDER: 1.0x
NO RELATED
Recommended Tools & Savings
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Affiliate disclosure: We may earn a commission at no extra cost to you.
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.