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 MANUALSCHEVROLET1990R 20 P/U 2WD V8-379 6.2L DSLREPAIR AND DIAGNOSISMAINTENANCESPECIFICATIONSTRANSMISSION/TRANSAXLE, MANUAL
1990 Chevrolet R 20 P/U 2WD V8-379 6.2L DSL
Transmission/Transaxle, Manual
1990 Chevrolet R 20 P/U 2WD V8-379 6.2L DSLSECTION Transmission/Transaxle, Manual
TYPE:
4-speed:
Top shift, iron case 1988-91 GLS
Side shift, side load 1988-89 AF
5-speed:
Sectional case (NV3500) 1994 GLS*
Top cover (NV4500) 1991-94 GLS
*GM part # 12345349
CAPACITY, Refill:
4-speed:
Top cover 4.0 Liters 8.4 Pints
Side shift, side load 4.0 Liters 8.4 Pints
5-speed:
Sectional case 1994 1.9 Liters** 4.0 Pints**
Top cover 3.8 Liters 8.0 Pints
**Approximate, fill to level of fill plug.
4-speed:
Top shift, iron case 1988-91 GLS
Side shift, side load 1988-89 AF
5-speed:
Sectional case (NV3500) 1994 GLS*
Top cover (NV4500) 1991-94 GLS
*GM part # 12345349
CAPACITY, Refill:
4-speed:
Top cover 4.0 Liters 8.4 Pints
Side shift, side load 4.0 Liters 8.4 Pints
5-speed:
Sectional case 1994 1.9 Liters** 4.0 Pints**
Top cover 3.8 Liters 8.0 Pints
**Approximate, fill to level of fill plug.
RENDER: 1.0x
NO RELATED
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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.