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Unread 06-18-2008, 06:46 PM
 
Location: Earth
4,208 posts, read 10,090,116 times
Reputation: 1957
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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Unread 06-18-2008, 06:52 PM
 
Location: West Virginia
7,888 posts, read 14,598,727 times
Reputation: 4018
You should be able to Feel the pull when engaged. But also check the U joints & drive train.
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Unread 06-18-2008, 07:24 PM
 
Location: Eastern NC
12,384 posts, read 6,820,343 times
Reputation: 9752
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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Unread 06-18-2008, 07:39 PM
 
Location: Earth
4,208 posts, read 10,090,116 times
Reputation: 1957
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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Unread 06-18-2008, 07:45 PM
 
Location: West Virginia
7,888 posts, read 14,598,727 times
Reputation: 4018
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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Unread 06-18-2008, 08:31 PM
 
3,460 posts, read 2,244,040 times
Reputation: 6677
Do they have a yard?
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Unread 06-18-2008, 08:59 PM
 
Location: Earth
4,208 posts, read 10,090,116 times
Reputation: 1957
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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Unread 06-19-2008, 02:29 PM
 
Location: Eastern Washington
8,704 posts, read 18,877,636 times
Reputation: 4573
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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Unread 06-19-2008, 03:52 PM
 
Location: Hauser Lake,ID
1,357 posts, read 1,620,919 times
Reputation: 760
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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Unread 06-19-2008, 04:04 PM
 
Location: Western Chicagoland
18,537 posts, read 46,776,332 times
Reputation: 7211
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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