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Transmission & Drive train

AWD/4WD thumping under acceleration


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Register to remove these ads. It's free! Hi, I have a 99 Eddie B. AWD that when you are accerating ...



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Old 10-09-2010, 12:13 PM   #1 (permalink)
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Default AWD/4WD thumping under acceleration


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Hi, I have a 99 Eddie B. AWD that when you are accerating makes a thump/clicking sound in the front end. I believe that it has something to do with, (this when the problem started) I had to replace a tire, even though it the same size it must be a tad taller than the old one. Causing the AWD to send power up front....But it sounds like something is wrong?????? I'm going to replace the other 3 tires to match put just curious if anyone eles has had this problem.

P.S. It also doe it when I put the selecter swicth in 4hi and 4lo.

Thanks
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Old 10-10-2010, 12:37 PM   #2 (permalink)
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I've heard sometimes if your tires are off by a bit iw will cause the awd tokick in. Try unplugging the fuse under the hood for the 4wd and see if the noie is still there.
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Old 12-07-2010, 10:22 AM   #3 (permalink)
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Mine is doing the exact same thing. I pulled the fuse and it stopped. what does that indicate? Will it hurt to drive it without the fuse?
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Old 12-07-2010, 11:16 AM   #4 (permalink)
 
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pulled what fuse?? AWD fuse or 4x4 in general? Mine does something similar, my tires jump and scuff on the pavement when im in 4L and Im turning, it will also stop it self like im riding the brakes when Im in 4L. 4H and AWD, it doesnt do that. But there is a significant amount of growling sound especially when turning while the 4wd is engaged. What would cause that? Is there a write up on How-To change the rear end gear oil and transfer case oil? Im pretty sure its NEVER been changed and will probably need to be done soon. Its getting cold here!
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Old 12-07-2010, 05:18 PM   #5 (permalink)
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there is a write up on how to change rear diff fluid. and it is pretty much the same thing for the front, just different viscosity fluids. for transfercase, it is like changing your transmission fluid. there should be a port to empty it and another to fill it. if you are in 4L and turning on pavement, you are going to get a lot of resistance, almost unnatural feeling. if you are getting "growling" while turning in 4H and A4WD, then you may need to change out your CV shaft.
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Old 12-07-2010, 10:52 PM   #6 (permalink)
 
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Its because of changing the tire, any diameter change on the tires over a quarter of an inch in difference will throw the speed sensors off, and will think its slipping and cause it to lock in and out of 4h, and it is fuse number 104 under the hood and will not hurt it one bit check out the brown wire mod works good and lots of fun in two wheel drive with all that power ........Light em up easyyyyyyyyyyyyyyyyyyyyy
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Old 12-07-2010, 11:52 PM   #7 (permalink)
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i dont really have much faith in this "brown wire mod". they guys that have done it say their front tires still spin on the lift...i would love to ditch the A4WD!
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