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 MANUALSCHEVROLET1994G 10 VAN V8-305 5.0LREPAIR AND DIAGNOSISTRANSMISSION AND DRIVETRAINAUTOMATIC TRANSMISSION/TRANSAXLESERVICE AND REPAIROVERHAUL4L80-E AUTOMATIC TRANSMISSIONSUBASSEMBLY SERVICETRANSMISSION CASE
1994 Chevrolet G 10 Van V8-305 5.0L
Transmission Case
1994 Chevrolet G 10 Van V8-305 5.0LSECTION Transmission Case
1. Inspect transmission case for cracks, porosity, connected passages, scored bushings and excess gasket material left on surfaces.
2. Inspect case extension for cracks, porosity and scored bushings.
3. Inspect all threaded holes for damage and repair as necessary.
4. Air check all fluid passages.
5. Inspect front and rear servo bores for porosity, burrs and damage.
6. Inspect cooler line connectors for damage and properly torque at 26 ft. lbs.
7. Inspect intermediate clutch plate lugs, snap ring grooves and case center support hole for damage.
8. Inspect speed sensors and brackets, pipe vent, PWM solenoid screen, rear lube seal and manual shaft seal for damage. Replace as necessary.
2. Inspect case extension for cracks, porosity and scored bushings.
3. Inspect all threaded holes for damage and repair as necessary.
4. Air check all fluid passages.
5. Inspect front and rear servo bores for porosity, burrs and damage.
6. Inspect cooler line connectors for damage and properly torque at 26 ft. lbs.
7. Inspect intermediate clutch plate lugs, snap ring grooves and case center support hole for damage.
8. Inspect speed sensors and brackets, pipe vent, PWM solenoid screen, rear lube seal and manual shaft seal for damage. Replace as necessary.
RENDER: 1.0x
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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.