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How to Remove a Chevy Blazer Rear Transfer Case
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
1
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.
2
Raise the vehicle and support with jack stands placed underneath the frame.
3
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.
4
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.
5
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
6
Label and disconnect the electrical wires and vacuum lines connected to the transfer case. Use masking tape and a marker.
7
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.
8
Position a floor jack underneath the transfer case. Raise it enough to take the weight of the transfer case off the transmission.
9
Remove the bolts that connect the transfer case to the transmission using a socket or wrench.
10
Slide the transfer case rearward to disengage it from the transfer case. Lower the floor jack, and remove the transfer case from the vehicle
check the vacuum switch on the center of the fire wall above the distributer, bypass it to see if the axle engages if so replace it, if not may need a front axle actuator
on the side of the 88 transfer case is a inspection bolt 15/16 by the front drive shaft if it is a new process 205 case. remove cap bolt and fill till lube comes out and its full
You will see the motor move when you engage the switch on the dash. The motor is on the bottom of the transfer case behind the transmission. Most likely it's the actuator for the hub lockouts under the battery tray. They wear out after a few years. It could also be the cable that locks the hubs that goes from the actuator to the hub lock in the front differential. Also, check your front differential oil level, if it's not getting oil it won't disengage. Check to make sure the hoses between the transfer case and the actuator are not leaking. If that isn't the case there is a air activated switch ont he top of the transfer case where the air hoses plug into, it has three hoses that go to it. That switch screws in but you have to lower the transmission cross member to get to it. It could also be bad, it costs about twelve dollars. Good luck.
No. The out-put shaft on the tranny goes straight through and there are no seals except for the transfer case out-put shaft. There is only a gasket that seals the two cases.
On the backside of the transfer case,as it sits in the vehicle.The plugs will be facing the rear differential.The one down low is the drain,while the top one is fill,of course.The fluid recommended is automatic transmission fluid,Dexron,and the transfer case is full when the fluid is at the bottom of the fill hole.
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