The transfer case on a Chevrolet Blazer is underneath the vehicle, mounted to the rear of the transmission. On four-wheel drive vehicles, the transfer case takes power generated by the engine and channeled through the transmission and directs it to the front and rear drive axles. Over time, the gears and bearings inside the transfer case can wear and the transfer case must be rebuilt. The transfer case on this vehicle must be removed before it can be serviced.
Things You'll Need
- Wrench set
- Floor jack
- Jack stands
- Socket set
- Masking tape
- Needle-nose pliers
Removing the Driveshafts
Disconnect the ground cable from the negative battery terminal, by using a wrench to loosen the retaining bolt and pulling the clamp off the terminal.
Raise the vehicle and support with jack stands placed underneath the frame.
Drain the transfer case. Locate the drain plug near the bottom of the transfer case. Place a waste oil collection pan underneath the plug and use a socket to remove it. Once all the fluid has drained out, reinstall the plug.
Remove the bolts that connect the rear driveshaft to the rear axle yoke using a socket. Lower the driveshaft, and slide it backward underneath the rear axle to disengage it from the transfer case. Remove it from the vehicle.
Remove the bolts that connect the front driveshaft to the front axle yoke using a socket. Lower the driveshaft, and slide it forward underneath the front axle to disengage it from the transfer case. Remove the driveshaft from the vehicle.
Removing the Transfer Case
Label and disconnect the electrical wires and vacuum lines connected to the transfer case. Use masking tape and a marker.
Remove the transfer case shifter rod. Using needle-nose pliers, remove the clip that connects the shifter rod to the transfer case. Slide the rod away from the transfer case.
Position a floor jack underneath the transfer case. Raise it enough to take the weight of the transfer case off the transmission.
Remove the bolts that connect the transfer case to the transmission using a socket or wrench.
Slide the transfer case rearward to disengage it from the transfer case. Lower the floor jack, and remove the transfer case from the vehicle.
Tips & Warnings
- Use paint or white chalk to mark the orientation of the driveshafts. Reinstalling them in the same position as they were removed will help minimize driveline vibrations.
- Always follow the instructions listed in the owner's manual when lifting or lowering a vehicle. Failure to do so may cause injury or death.
- "Chilton's General Motors Blazer/Jimmy/Typhoon/Bravada 1983-93 Repair Manual"; W.G. Nichols; 1999
- "Haynes Chevrolet & GMC Pickups 1988 through 1998 Automotive Repair Manual"; Ken Freund and John Harold Haynes; 1997
- "Chevrolet Pickup Parts Interchange Manual 1967-1978"; Paul Herd; 1999
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