Re: 4WD problem

- P
- PerfectReign
  
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posted
15 years ago

Thu, Dec 11, 2008 5:29 AM

1998 GMC Jimmy auto transmission with 3 button push for 4 WD. 4.3
> engine. I was in 4WD and went to go out but it did not shift and went > to what I would call N. I had no power to any wheel. I put it in park > and hear a slight grinding and it when into 4WD. I managed to get it > home but it was like it popped out of drive and back to N and no power > to the wheels. > > I changed the ball looking vac switch on top or the trasnsfer switch > but still have the problem. It will not shift into 4WD then it went to > no power again. I put it P and after playing with the buttons it went > back to 2WD. > > Any ideas?

I had the '95 4WD SLE.

AFAIR, your vacumn actuator is shot. You need to check that.

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- Mike Marlow
  
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posted
15 years ago

Thu, Dec 11, 2008 1:17 PM

On Wed, 10 Dec 2008 21:29:26 -0800, PerfectReign cast forth these pearls of wisdom...:

Could very well be. It is worth disconnecting the battery for 20 minutes or so and then re-connecting it. The Jimmy and Blazer both get confused on rare occassion and this technique has been known to fix this problem. Certainly worth the investment in your time.

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- Steve W.
  
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posted
15 years ago

Thu, Dec 11, 2008 4:59 PM

Sounds more like the encoder motor on the transfer case. The front actuator wouldn't make it have NO power to the wheels. Only a problem in the T-case can do that.