Mechanics

TRANSMISSION R&R

1993 GMC Sierra • V8 4WD Automatic • 150,000 miles

I have a 1993 GMC Sierra k1500 4x4 that the 3/4 clutches have gone out in. I was wanting to know if there are any transmission and transfer case removal and installation issues I need to be aware of before I start? I have a reman trans for the truck, but I have never pulled a trans with a transfer case before.
Avatar
Cityman2011
February 20, 2011.




Here are the removal and installation procedures. Hope it is helpful.

TRANSMISSION
Removal & Installation

1. Disconnect negative battery cable. Remove air cleaner. Disconnect Throttle Valve (T.V.) Cable from throttle linkage, if equipped. Raise and support vehicle. Drain transmission fluid. Disconnect shift linkage. Mark rear drive shaft for installation reference and remove from vehicle. Mark front drive shaft and remove from transfer case, if equipped.

2. Relieve fuel pressure, and remove fuel lines. Remove support bracket at catalytic converter. Support transmission with transmission jack. Remove transmission crossmember.

NOTE: DO NOT stretch or damage any cables, wires or other component when lowering transmission.

3. Lower transmission far enough to provide clearance for other components. Remove dipstick tube and seal. Cover opening in transmission. Remove speedometer harness and vacuum modulator line, if equipped. Remove electrical connectors from transmission. Remove
cooler lines, and cap all openings.

4. Remove transfer case shifter and move it aside, if equipped. Remove transmission support braces. Note location of braces for installation. Remove converter housing cover. Mark flexplate and torque converter alignment. Remove flexplate-to-torque converter bolts.

NOTE: Support engine with jack or hoist before disconnecting transmission.

5. Remove transmission-to-engine bolts. Note location of any brackets or clips and move them aside. Slide transmission straight back, off locating pins, and install Converter Holding Strap (J-21366). Remove transmission from vehicle.

6. To install, reverse removal procedure. Torque converter must be against flexplate and rotate freely by hand. Ensure all reference marks align. Tighten all bolts to specification, and fill
transmission with fluid.

KHLow2008
Feb 20, 2011.


AD