Beat an old dog "the WIGGLE" - JeepForum.com
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post #1 of 12 Old 07-04-2020, 12:11 PM Thread Starter
keyman6868
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Wj Beat an old dog "the WIGGLE"

Yes I have read (over the last 2 years) every post and have done pretty much everything that has been posted but i still have the acceleration and decelerating wiggle issue. Ok ready for this *****---
2002 jeep Grand Cherokee 4.7 quadratrac 199,000 miles
New motor and mounts
New transfer case
new control arms all-- front and backs
new ball joints upper lowers in the front and the a arm in the back.
new front hubs
new rotors and brakes all the way around.
all of the steering components
4 wheel alignment
shocks are all fox shocks none leaking or blown out.
I did climb under it today after it was jacked up from the center of the Diff. and if you rotate the tire frontwards and backwards with it in gear the differential does move up and down maybe 1/8 inch
Any thoughts ANYONE......

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post #2 of 12 Old 07-04-2020, 12:27 PM
JoMc67
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Please...Man-of-Key, Speak-ith more this Accel/Decel issue you’re having,
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post #3 of 12 Old 07-04-2020, 01:08 PM Thread Starter
keyman6868
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give gas pulls to the right or left and let off goes the opposite way. Been dealing with it for 2 years since I bought it. Im pretty mech. inclined and can fix just about anything but this one is killing me! Oh yea all 4 tires are new too!
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post #4 of 12 Old 07-04-2020, 05:44 PM
GmanWJ
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When mine did this it was because the rear lower control arm bushings failed. Others have experienced similar symptoms with rear upper control arm.

So obviously my recommendation is to check/replace rear LCA, but you should also inspect rear UCA and ball joint
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ok mostly just repairs, but we are closing in on a lift
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post #5 of 12 Old 07-04-2020, 05:47 PM
GmanWJ
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I should mention that mine did not behave like this until I replaced the rear LCAs with Mopar in prep for lifting, but the replacements crapped out within a month.


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ok mostly just repairs, but we are closing in on a lift
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post #6 of 12 Old 07-05-2020, 08:20 AM
jtpeters
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^^+1.
Definitely sounds like a rear Control Arm issue (upper or lower).
Sounds like your an accomplished mechanic.
If 'all' those components are new, I would recheck everything back there.
I'm sure you're also aware not to torque the lower control arms until the vehicle is resting on the ground.

2004 Jeep Overland WJ 4.7 H.O. (Bought new in Oct 2003)
2014 Jeep Overland WK2 5.7 Hemi (Bought used in 2016 w/7k miles)
1970 Ford Mustang Boss 302 (in Family since 1974)
2013 Ford Mustang Boss 302
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post #7 of 12 Old 07-05-2020, 09:38 AM Thread Starter
keyman6868
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yes I did the torque on the ground. Did a lot of research before i did the job. Thanks I will check them.
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post #8 of 12 Old 07-05-2020, 09:42 AM Thread Starter
keyman6868
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Okay I see the tear in the bushing- thanks guys. Will redo with new arms again and maybe some new bolts. The head is a little bit worn!
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post #9 of 12 Old 07-05-2020, 05:33 PM Thread Starter
keyman6868
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I would of never thought to check the rear arms, after i just did them 1.5 years ago! Prof this forum rocks! They must of re engineered them. New ones are solid. Poop im not yelling just not gonna retype it. Its only a 114f today in metro phoenix arizona! Im hot!
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post #10 of 12 Old 07-05-2020, 08:45 PM
snowbuggy
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I never understood those wimpy bushings. I just bought some control arms and didn't see any solid ones. THAT IS AWESOME that they make them more durable now.
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post #11 of 12 Old 07-06-2020, 07:29 AM
jtpeters
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When I replaced all the rear control arms in my 04, the only modification I had to make was to tap the holes on the driver's side upper control arm which secure the brake line running from the frame to the rear axle breather tube.
If this is the case with your UCA, I highly recommend you do the job PRIOR to installation, as it is a pain in the arse to complete the procedure after installation.

2004 Jeep Overland WJ 4.7 H.O. (Bought new in Oct 2003)
2014 Jeep Overland WK2 5.7 Hemi (Bought used in 2016 w/7k miles)
1970 Ford Mustang Boss 302 (in Family since 1974)
2013 Ford Mustang Boss 302
2011 BMW 328i
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post #12 of 12 Old 07-06-2020, 10:00 AM
MuloChico
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Quote:
Originally Posted by jtpeters View Post
When I replaced all the rear control arms in my 04, the only modification I had to make was to tap the holes on the driver's side upper control arm which secure the brake line running from the frame to the rear axle breather tube.
If this is the case with your UCA, I highly recommend you do the job PRIOR to installation, as it is a pain in the arse to complete the procedure after installation.
^^^^ x2
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