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Unread 11-02-2013, 05:51 PM   #1
RaceDirector
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Downshifting to low CLUNK

HI All, Im new and I have searched and read at least 15-20 posts on this topic and haven't seen a solution. Evidently its a fairly common problem.

2005 / 4.7 / 2WD / Grand Cherokee / 90k miles. When downshifting into low I get a clunk. The faster I stop, the louder the bang. If I shift into neutral at 25-30 mph and stop I have no issues. It gets worse when the vehicle gets heat in it. For the 1st few miles its very soft or unnoticeable. But after 5-10 minutes in its very repeatable.

Transmission?

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Unread 11-02-2013, 05:56 PM   #2
JeepN4KC
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Your question is confusing.

2wd shifting into low? What does that mean?

Vehicle gets heat in it.........?
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Unread 11-02-2013, 06:00 PM   #3
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Sorry, auto transmission downshifting into 1st gear at around 10-15 mph while slowing down or braking.
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Unread 11-02-2013, 06:05 PM   #4
JeepN4KC
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Downshifting with the autoshift or the transmission itself?

If you are using the autostick to downshift into 1st as you come to a stop then I'd say stop doing that - let the tranny do it.

If the tranny is downshifting rough then I'd say get it serviced - drain/filter swap/refill. Due anyway if it's never been done.
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Unread 11-02-2013, 06:19 PM   #5
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No auto stick shifting, I just leave it in drive. I guess I'll pull the pan and change the filter. Does the converter have a drain plug?
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Unread 11-02-2013, 06:21 PM   #6
JeepN4KC
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I'm not sure what you mean by converter. The transmission pan has to be dropped in order to drain the fluid..
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Unread 11-02-2013, 06:21 PM   #7
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No, just drop the pan.

Being 2wd, you probably just have one filter but the possibility exists that you have the cooler return filter as well. The cooler return filter is a spin on just like the engine oil filter. It's inside the pan as well.
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Unread 11-02-2013, 06:30 PM   #8
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Quote:
Originally Posted by JeepN4KC View Post
I'm not sure what you mean by converter. The transmission pan has to be dropped in order to drain the fluid..
The torque converter holds quite a bit of fluid, some have a bolt that you can remove to drain the fluid out. If not than a couple quarts of old fluid remain in the system.
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Unread 11-02-2013, 07:57 PM   #9
quicksilverado
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Never seen a tq converter that has a drain plug in it.
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Unread 11-11-2013, 04:37 AM   #10
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Clunk may be bad bushing(s).
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Unread 11-11-2013, 04:52 AM   #11
RaceDirector
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After reading the search results I was hoping that was the problem but it's transmission related. Only issue it the downshift into 1st. Haven't had time to drop the pan but I did notice it doesn't happen when it's cold. For the 1st 10 minutes of driving it's smooth as silk. After the transmission get some heat in it it returns. It gets worse the faster I slow down. A slow rolling stop it's hardly noticeable, If I hammer the brakes it bangs pretty good. Sliding it into neutral when coming to a stop eliminates the clunk everytime.

I hope a oil change and filter helps. I also heard about some software flash update ?

Thanks for the replys
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Unread 11-11-2013, 06:08 PM   #12
quicksilverado
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Does it clunk when you shift from neutral-drive or neutral-reverse?
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Unread 11-11-2013, 07:50 PM   #13
RaceDirector
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No, never. It happens only while slowing down when the transmission goes into 1st gear.
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Unread 11-12-2013, 01:55 PM   #14
nick81
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I would at least look at the differential bushing that is on top of your front diff. Mine was clunking around and replacing that solved it for good. You can visually inspect and see if it is an issue....just gotta get under there.
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Unread 11-12-2013, 03:31 PM   #15
RaceDirector
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This is a 2wd Jeep. No front differential but thanks anyway.
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