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post #1 of 8 Old 08-22-2017, 08:44 AM Thread Starter
4x4everXJ
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shake in rear end

This has been getting progressively worse since I got it. Every time i come to a stop and go again the rear end shakes or bounces for about 6 ft and then smooths out. I don't if that's just what drum brakes are supposed to be like or I have a serious problem. Any ideas?

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post #2 of 8 Old 08-22-2017, 09:02 AM
COMTB
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Quote:
Originally Posted by 4x4everXJ View Post
This has been getting progressively worse since I got it. Every time i come to a stop and go again the rear end shakes or bounces for about 6 ft and then smooths out. I don't if that's just what drum brakes are supposed to be like or I have a serious problem. Any ideas?

Since my drums don't do this I don't believe that's normal behavior. Have you taken the rear drums off to see if the shoes are dragging?

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post #3 of 8 Old 08-23-2017, 08:46 AM Thread Starter
4x4everXJ
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Since my drums don't do this I don't believe that's normal behavior. Have you taken the rear drums off to see if the shoes are dragging?
It wouldn't be that its more like a clunk before the jeep moves forward and then it smooths out I'm guessing in around 6ft i could be very wrong. I've tried going around my neighborhood and slamming on the brakes real hard hoping that with somehow counter the issue but I don't think its the shoes because it would drag constantly, but I really don't know what else it could be
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post #4 of 8 Old 08-23-2017, 09:04 AM
CJ7-Tim
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The problem could be u-joints, the driveshaft, the diffenential, or something at the leaf springs.


So far, what have you checked and inspected in the rear drive-line ? Are all the u-joints tight ? Is the driveshaft slip yoke free of excess play ? Have you inspected the differential internal parts ? Have you inspected the leaf springs, U-bolts, and shackles/shackle bolts on the rear suspension for loose fasteners or broken parts ? Have you removed the rear brake drums and inspected the brakes ? Have you removed the rear driveshaft, put the transfer case into 4 high and gone for a test drive ?

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post #5 of 8 Old 08-23-2017, 03:45 PM
RLE
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I wonder if the transmission mount could be worn out.

Try coming to a stop without using your brakes at all, like say, on a
slight incline. Then start up again and see if it bounces around.
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post #6 of 8 Old 08-24-2017, 01:04 PM Thread Starter
4x4everXJ
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Quote:
Originally Posted by CJ7-Tim View Post
The problem could be u-joints, the driveshaft, the diffenential, or something at the leaf springs.


So far, what have you checked and inspected in the rear drive-line ? Are all the u-joints tight ? Is the driveshaft slip yoke free of excess play ? Have you inspected the differential internal parts ? Have you inspected the leaf springs, U-bolts, and shackles/shackle bolts on the rear suspension for loose fasteners or broken parts ? Have you removed the rear brake drums and inspected the brakes ? Have you removed the rear driveshaft, put the transfer case into 4 high and gone for a test drive ?
Quote:
Originally Posted by RLE View Post
I wonder if the transmission mount could be worn out.

Try coming to a stop without using your brakes at all, like say, on a
slight incline. Then start up again and see if it bounces around.
I'll get on this, guys, thanks
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post #7 of 8 Old 08-25-2017, 06:21 AM
S8NNG8
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Completely blown or broken rear shocks in combination with highly flexible worn stock springs could be causing excessive axlewrap, thus destroying u-joints and causing driveline vibes.
Some chain reaction led to the condition, so dont think that fixing one thing is gonna resolve the issue or prevent it from reoccurring.

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post #8 of 8 Old 08-25-2017, 07:52 AM
Para32
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I would jack it up and have a look. First get a floor jack and lift it by the 'pumpkin' and inspect the brakes.
After that, jack it up and use a couple of jack stands and support the vehicle by the frame (suspension free to 'droop')
Inspect all of the locations noted above

Or, take it to a garage I bet they will be able to figure it out too
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