Creaking Noise when Shifting Automatic Transmission - JeepForum.com

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post #1 of 21 Old 08-03-2010, 11:13 PM Thread Starter
rspina
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2002 WJ 
 
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Creaking Noise when Shifting Automatic Transmission

I'm new to the forum. I recently bought a gorgeous 2002 JGC Limited with all the toys. I'm having an interesitng problem though and I can't seem to find anything on it in any of the forums.

Whenever I shift into reverse or drive (automatic transmission) I hear this loud creaking noise, almost as if the car was trying to move, but the brakes were holding it back (its kinda like rubbing your hand on a ceramic plate/glass). Any ideas what it could be? Other than that the transmission makes normal noises (the generic Chrysler buzzing noise) but I'm just worried about the creak noise.

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post #2 of 21 Old 08-03-2010, 11:27 PM
bigbossd1030
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You are exactly right... its the breaks rubbing on the rotor.
Try this... shift to neutral then let go of break... then shift to drive.
There will not be a squeek, mine does the same thing.

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post #3 of 21 Old 08-03-2010, 11:29 PM Thread Starter
rspina
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is there a way to fix this? like would this require a realignment of the brakes or something? is it a caliper pin or something?
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post #4 of 21 Old 08-03-2010, 11:35 PM
bigbossd1030
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Does it do it when you drive or just that initial jerk?
If it doesn't do it when you drive then you don't have to worry about it.
If it bothers you that much... then do a break job and it that doesn't help then new rotors.
I don't think it is anything that can lead to problems in the future.

/l ,[____],
l----L-[]lllllll[]-
()_)-()_)--o)_)

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post #5 of 21 Old 08-03-2010, 11:39 PM Thread Starter
rspina
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The noise happens on that initial jerk, and also at very very low speed braking (<1-3mph). But I also have a bit of squeal at low speed stopping (between maybe 4-10mph). I'm not sure if that's just because of the brake pad material (I've heard the semi-metallics are quite noisy) or if something wasnt done right when the brakes were last service before I purchsaed. The front wheels throw quite a bit or brake dust (I cleaned them off twice last week) Could this be an indicator of a more serious issue?

2002 JGC Limited 4.7 V8 (Stock)
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post #6 of 21 Old 08-03-2010, 11:45 PM
bigbossd1030
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Thats just your brakes, get them changed with some well know brand ones. Also check them for small rocks and debris, this can cause a squeek and also lead to a large about of brake dust.
Don't let it get to you it is not a serious problem.

/l ,[____],
l----L-[]lllllll[]-
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post #7 of 21 Old 08-04-2010, 02:26 AM
00RedWJ
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I didn't think that was the brakes. Mine does that even if you have the brakes to the floor. There is no way I'm finding any play in the brakes when they are locked up. I thought it was coming from the transmission mounts or rear differential mounts as the drivetrain torques between forward, then reverse. Watch the drivetrain underneath (carefully of course) as someone shifts from drive to reverse.

Mine always did that. It doesnt bother me.

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4.0 with Selec-trac - Sold
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post #8 of 21 Old 08-04-2010, 11:00 AM
thnksno
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It's the brakes... Changing them doesn't help, mine are new a couple months ago and properly setup, I did note though that the caliper brackets where the pads ride had wear spots, minor ones... This may be why mine still creak when shifting between F and R as there may be a little play for the pad to slip a mm or two?

I dunno... But am more inclined to think of how the brakes work. i.e. the stopping force of the rear brakes being a FRACTION of the front brakes. The creak definitely sounds like a creak heard from the fronts when lightly holding the pedal, like at a light. This being totally normal... I think the rears, no matter how much you stomp on them cannot hold the torque of the shift taking up slack of the drive line... Think about it there is a little play in every part between the wheel and the transmission. The transfer case, driveshaft, ring and pinion, axles and all have a little wiggle room... The transmission spins everything in one direction and slack is taken up allowing the torque to slightly 'freewheel' before putting down force which the rear brakes cannot overcome.

I found that slowing down that initial shift or letting go of the brakes mid-shift the noise goes away or is minimized to a light 'clunk' of everything coming together. Rolling a little backwards after reversing, lightly tapping the brake to a crawl then shifting to drive I hear nothing at all.
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post #9 of 21 Old 08-04-2010, 11:22 AM
00RedWJ
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I think the noise I'm hearing is different. There's no shortage of odd noises in my Jeep, especially when it's freezing out.

2000 Red Laredo WJ
4.0 with Selec-trac - Sold
2006 Black Laredo WK
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post #10 of 21 Old 08-04-2010, 11:44 AM
ruggedscotsman
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Its probably not the brakes, and nothing to worry about. According to lots of folks around here, it could be solenoid packs in the tranny. Mine makes a clicking/creaking sound going in and out of F/R and a clunk going into park, but the dealer says its fine.

http://www.jeepforum.com/forum/f13/5...roblems-30660/
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post #11 of 21 Old 08-04-2010, 12:58 PM
Mighty Thor
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It is not just the brakes, it is the whole driveline loading with stress as you engage drive or reverse and it is common on Chrysler vehicles with some miles on em. You can see stuff move if you have someone shift the vehicle while you (CAREFULLY) look underneath. It does not mean that anything is wrong but I know I get some funny looks from people when in the parking lot. Short of replacing most of the items in the drive line I don't think there is much that can be done to fix the noise so I just think of it as the Jeep telling me it's rearing to go.

Is that supposed to look like that?


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post #12 of 21 Old 08-04-2010, 06:13 PM
thnksno
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The transmission is a clunk or ticking, not a creak... I can pretty much demonstrate this "creak" numerous ways and am almost certain what you are hearing is a slight 'chatter' of the rear brakes unable to hold the discs while shifting.

For example, back down an incline and slow the truck lightly to a creep... Sounds just nearly the same as going forward and lightly releasing the brakes on the same incline?
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post #13 of 21 Old 08-05-2010, 12:24 AM
mverne
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check the balljoint and bushings on your rear upper a-arm...
I had a similar problem I was chasing for about a year and that was the culprit.
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post #14 of 21 Old 08-05-2010, 06:24 AM Thread Starter
rspina
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Quote:
Originally Posted by bigbossd1030 View Post
You are exactly right... its the breaks rubbing on the rotor.
Try this... shift to neutral then let go of break... then shift to drive.
There will not be a squeek, mine does the same thing.
I think my final verdict was the brakes. The sound was absent when shifting without the brakes applied. Sure lost a few nights of sleep over it though.

2002 JGC Limited 4.7 V8 (Stock)
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post #15 of 21 Old 08-05-2010, 08:32 AM
99JGCWJ
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Quote:
Originally Posted by bigbossd1030 View Post
You are exactly right... its the breaks rubbing on the rotor.
Try this... shift to neutral then let go of break... then shift to drive.
There will not be a squeek, mine does the same thing.
x2 my 1999 Grand does it too.

SIX IN A ROW MAKES IT GO!!!
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