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Funtastic
Novice
Mar 16, 2012, 8:29 PM
Post #1 of 7
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I recently bought a 2001 Chevy blazer with 2WD/4WD it has a 4.3 Vortec engine and it has 132,000 miles. I leave it in 2WD all the time but when I start off it feels like its in 4WD and then a few mins later it's like 2WD again. But if I park it and put it back in drive then it does the same thing. What does that mean?
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speed
User
Mar 17, 2012, 12:05 PM
Post #2 of 7
(1778 views)
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Re: Help with 4WD
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i have no ideas the other veterans here might but this is a drivability issue and is something best for a technician that can go for a drive with you or test drive and see for themselves exactly what your talking about.
GM ASEP 26 SCC Milford ASE certified in Brakes and Electrical on Thursday April 5th 2012
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Funtastic
Novice
Mar 17, 2012, 1:59 PM
Post #3 of 7
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Re: Help with 4WD
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I dont know it's like it starts off really sluggish and then it's like it just wakes up and realizes its in 2WD. I guess I'll have to take it to a shop as much as I hate to. Thanks for the response!
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Discretesignals
Ultimate Carjunky
/ Moderator
Mar 17, 2012, 2:26 PM
Post #4 of 7
(1766 views)
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Re: Help with 4WD
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Another question: If you put it into four wheel drive and take off, does it duplicate your symptoms?
Since you probably don't have a scan tool that can get into the transfer case control module to look at the encoder motor position, you could unplug the encoder motor down on the transfer case after making sure the transfer case is selected for 2WD. If for some odd reason its going into 4 wheel drive on it's own, it can't do that when the encoder motor connector is unplugged.
If the problem is still there with the encoder unplugged, more than likely the 4wd isn't causing your symptoms and you need to look elsewhere.
Since we volunteer our time and knowledge, we ask for you to please follow up when a problem is resolved.
(This post was edited by Discretesignals on Mar 17, 2012, 2:31 PM)
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Funtastic
Novice
Mar 17, 2012, 8:33 PM
Post #5 of 7
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Re: Help with 4WD
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I haven't even thought about doin that. This is my first 4WD vehicle and I got spooked when it started acting up. Thanks for your replies I hope I can figure this thing out, I'll let y'all know something after I try it.
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joshuaelrich
New User
Mar 19, 2012, 1:03 PM
Post #6 of 7
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Re: Help with 4WD
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It sounds like the trans may be starting off in second gear. When you start off in drive and it feels sluggish, try pulling the shifter down into low, forcing the trans into first gear.. If that works you may have a sticky governor in the trans.
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Funtastic
Novice
Mar 19, 2012, 1:08 PM
Post #7 of 7
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Re: Help with 4WD
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Ok took it to the shop today. Don't know what all they did, just checked everything out, but the prob is gone and it didn't cost me anything so it's all good! Thanks for yall's help! 
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