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1994 GMC Jimmy 4WD WILL NOT ENGAGE

Tiny
TONYRICC
  • MEMBER
  • 1994 GMC JIMMY
Transmission problem
1994 GMC Jimmy 6 cyl Four Wheel Drive Automatic

CHANGED OUT VACUUM SWITCH, VACUUM LINES, AND SWITCH ON DASH. PUSH SWITCH AND 4WD WILL NOT ENGAGE OR ATTEMPT TO ENGAGE. WHAT ELSE COULD I DO TO REOAIR THE 4WD?
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Monday, October 20th, 2008 AT 3:09 PM

1 Reply

Tiny
SWILLIAMS
  • MECHANIC
  • 597 POSTS
Check the actuator cable that activates the front axle disconnect. It is bolted to the inner fender and the cable runs down to the axle. If you apply vacuum it should pull in and shift the interlock. To see if it is working, jack up the right front so the tire clears. The tire should rotate pretty free. Now engage the interlock. The tire should become harder to turn and the front drive shaft should turn. Now engage the 4X4 (with the trans in park) and see if you can still turn the tire. You shouldn't be able to turn it with the interlock activated.
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Friday, October 24th, 2008 AT 3:20 PM

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