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Old 06-18-2008, 06:46 PM
 
Location: Earth
4,212 posts, read 10,873,445 times
Reputation: 1986
Default Buying a 4WD - how can I tell if the 4WD works?

When buying a 4WD how can i tell if the 4WD works?
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Old 06-18-2008, 06:52 PM
 
Location: West Virginia
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You should be able to Feel the pull when engaged. But also check the U joints & drive train.
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Old 06-18-2008, 07:24 PM
 
Location: Eastern NC
12,611 posts, read 7,445,347 times
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Yep, you should be able to feel the additional pull. Or you could drive slowely on dry pavement and turn the wheels. you will hear bad loud noises coming from the drive train. Don't do this very much because it could damage the drivetrain.
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Old 06-18-2008, 07:39 PM
 
Location: Earth
4,212 posts, read 10,873,445 times
Reputation: 1986
Ok should I be on the road to feel this additional pull? Or should I risk off roading it before buying?
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Old 06-18-2008, 07:45 PM
 
Location: West Virginia
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That depends on weather the owner will let you...is it still tagged & insured? Is there a steep grade you could try nearby?
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Old 06-18-2008, 08:31 PM
 
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Do they have a yard?
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Old 06-18-2008, 08:59 PM
 
Location: Earth
4,212 posts, read 10,873,445 times
Reputation: 1986
It's sitting on a military installation so no yard. It is tagged, and I would hope insured. Just wasn't sure how to tell if the 4WD was working short of putting it in a mud pit and seeing if it could get out in 4 wheel as opposed to 2 wheel.
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Old 06-19-2008, 02:29 PM
 
Location: Eastern Washington
8,737 posts, read 20,561,569 times
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If it will shift into 4 HI and into 4 LO probably it works OK. For a pickup, if you can stop on a downhill slope, dirt is better but you can tell even on pavement, put it in reverse and give it a little welly. A 2WD, particularly with no posi-traction, will spin pretty easy - with 4WD the front tires should bite and move you. Or just jump a curb, or over-run a stop block, it will feel different in 4WD - should hop right over with much less effort.
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Old 06-19-2008, 03:52 PM
 
Location: Hauser Lake,ID
1,426 posts, read 1,748,852 times
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If you are limited in testing it you can have a second person look at the front drive shaft to see if it is turning when in 4WD. You can tell if LO works by the engine revs. at low speed.
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Old 06-19-2008, 04:04 PM
 
Location: Western Chicagoland
18,533 posts, read 48,389,739 times
Reputation: 7274
Easy test: put it in 4WD, pull into gravel pit, turn wheel, floor it. If you start doing fast donuts, the 4WD aint workin.
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