please help! possible major problem.
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Joined: Jan 2007
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please help! possible major problem.
My 97 Expy XLT 4x4 is having some issue that I have never experienced. Upon take off, a thumping sound comes from the rear and possibly the tranny of the truck. It feels like the tranny is pulling hard. Most of the noise and the pulling feeling seem to come from the rear. I thought it was the rear diff but it also makes the pulling and thumping noise in AWD mode and in reverse. Another thing I noticed is when I make a full circle turn either way, the noise and thumping is more frequent.
I have new tires (bought about 4 months ago). I took off every tire and nothing seems to be broken or loose. In mid December, I took it in to the dealer to take care of a O2 sensor problem and the 4x4 not engaging. The 4x4 was resolved by a new module. The O2 needed a pipe fitting because the heater/AC condensation was leaking on it and it kept causing the "check engine" light to come on. They also did a tune up, oil change and filter, and all fluids topped off. The tranny is full of fluid. By the way, my truck has over 206k miles. Rear diff fluid was changed about 100k miles ago.
Someone please help if you can. Thanks.
I have new tires (bought about 4 months ago). I took off every tire and nothing seems to be broken or loose. In mid December, I took it in to the dealer to take care of a O2 sensor problem and the 4x4 not engaging. The 4x4 was resolved by a new module. The O2 needed a pipe fitting because the heater/AC condensation was leaking on it and it kept causing the "check engine" light to come on. They also did a tune up, oil change and filter, and all fluids topped off. The tranny is full of fluid. By the way, my truck has over 206k miles. Rear diff fluid was changed about 100k miles ago.
Someone please help if you can. Thanks.
Posting Guru
Joined: Apr 2005
Posts: 1,787
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From: covington wa.
Maybe you have one or two flat spots on the bearings in one or both of your
CV joints. I've had this same type of sound with another vehicle, replaced the
joints and all was well. Something to look into, good luck.
CV joints. I've had this same type of sound with another vehicle, replaced the
joints and all was well. Something to look into, good luck.
Post Fiend
Joined: Jun 2003
Posts: 5,983
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I wonder if this is the same sound I have been hearing for a long time (when under moderate load) and if it is I'd love to know the cause/solution.
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hey everyone, i took my expy into the dealer and they said that the rear diff was now completely out. they opened it up and everything was broken. pieces of metal all over the place. $2700 to rebuild it! plus anything else that they might find! i'm not sure what to do. it has 208k+ miles and has been great to me and the family.
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More Turbo
Joined: Oct 2004
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From: Fort Worth, TX
The front ends of our trucks are a locking differential. Eventually, it would break. Then you have nothing...
Now if we had a limited slip front diff, that would be doable!
I think the salvage yard is going to be your cheapest option.
Now if we had a limited slip front diff, that would be doable!
I think the salvage yard is going to be your cheapest option.
New User
Joined: Jan 2007
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I have a question about your 4x4 issue you had, i have a 98 Navigator that is not engaging into 4 wheel drive. After researching the forums it looks like a solinod or vacuum leak could be the cause. Was that it in your case? How much did the dealer charge you for the repair if you don't mind me asking and if you don't mind explaining the problem in a little more detail i would really appreciate it. Thank you for your help.
And would would recomend a junk yard replacement as well, some will actually guarentee it for a period of time too.
And would would recomend a junk yard replacement as well, some will actually guarentee it for a period of time too.