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 MANUALSCHEVROLET1990CHEVY VAN G20, 6.2 C, 4L60/MD8REPAIR AND DIAGNOSIS (SINGLE PAGE)TRANSMISSIONAUTOMATIC TRANSREMOVAL & INSTALLATION - A/TTRANSMISSION REMOVAL & INSTALLATIONASTRO/SAFARIREMOVAL
1990 Chevrolet Chevy Van G20, 6.2 C, 4L60/MD8
Transmission Removal & Installation: Astro/Safari: Removal
1990 Chevrolet Chevy Van G20, 6.2 C, 4L60/MD8SECTION Removal
- Open hood and disconnect negative battery cable. Remove engine cover. Remove air cleaner. Disconnect T.V. cable at upper end. Raise vehicle. Drain transmission fluid. Remove drive shaft.
- Disconnect shift linkage at transmission. Disconnect all electrical leads at transmission and electrical harness clips on transmission. Remove transmission support bracket attaching bolts at converter.
- Disconnect exhaust crossover pipe from exhaust manifolds. Remove torque converter cover and mark flywheel and torque converter to maintain original balance. Remove torque converter to flywheel bolts. Position transmission jack under transmission and raise it slightly.
- Remove transmission crossmember-to-mount bolts, crossmember-to-frame bolts and vibration damper (if equipped). Note the location of transmission support brackets before removal for reassembly reference. Slide crossmember rearward and remove from vehicle.CAUTION: When lowering transmission to gain clearance for additional component removal, use care not to stretch or damage transmission lines, cables or wires.
- Lower transmission to gain access to oil cooler lines and T.V. cable attachments. Disconnect oil cooler lines and T.V. cable. Disconnect speedometer cable at transmission. Remove dipstick tube and seal. Cap all openings. Support engine and remove transmission to engine bolts.
- Disconnect transmission assembly, being careful not to damage any cables, lines or linkage. Install Torque Converter Holding Strap (J-21366) and remove transmission from vehicle.
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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.