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Old 07-03-2011, 10:48 PM   #1
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Hard Shifts

As a relative jeep newbie of a year and a half, why is it that both my 4.0, auto, shift hard from P/R/D? They both do it, but since we're selling the 99, it comes up with buyers. The 99 with 115K does it more than 01 with 130K. Is it just a jeep thing, or should I be concerned? Buyers sure are!

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Old 07-04-2011, 02:13 AM   #2
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No one, c'mon

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Old 07-04-2011, 02:16 AM   #3
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Quote:
Originally Posted by legman68
As a relative jeep newbie of a year and a half, why is it that both my 4.0, auto, shift hard from P/R/D? They both do it, but since we're selling the 99, it comes up with buyers. The 99 with 115K does it more than 01 with 130K. Is it just a jeep thing, or should I be concerned? Buyers sure are!
I had the same thing when my jeep was auto. Do you mean hard as in the the whole jeep moves and you feel the gear going in?
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Old 07-04-2011, 02:32 AM   #4
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As in a hard "clunk" as you move from park-reverse, that's the worst. Enough to shift the vehicle.
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Old 07-04-2011, 09:03 AM   #5
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Quote:
Originally Posted by legman68
As in a hard "clunk" as you move from park-reverse, that's the worst. Enough to shift the vehicle.
Yeah thats wat i had. My other 2 friends with the 3 spd have exactly the same thing.
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Old 07-04-2011, 12:37 PM   #6
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Any other help, or just explain it as "normal"?
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Old 07-04-2011, 03:42 PM   #7
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Could be a few things. Excessive play in the drive line, worn t-case chain, a worn mount (engine/trans/t-case), idle too high, bad u-joints, etc.

We have a 97 4.0 auto, 147000 miles, and you can barely feel it go into gear. Now granted if you go from reverse to drive or visa versa you get a little clunk, as you are changing the load direction on the drive train, but nothing I would consider abnormal.
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Old 07-04-2011, 04:32 PM   #8
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Well, we sold it today. The guy was feeling unsure about it, I told him no sweat, don't buy it. But he asked for another 100 bucks less, so from 7K we ended up with 6250, but it had an exhaust leak we were both aware of. In the end, hopefully they are happy. My daughter was sad to let her first baby go
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Old 07-04-2011, 05:12 PM   #9
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I have owned two Cherokees in the past and they both shifted hard from P-D or into reverse. I think it's just normal.
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Old 07-04-2011, 05:13 PM   #10
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I always always always, (5 years now)shift to neutral for a few seconds before I shift into drive, or reverse, and make sure I am completely stopped before I change directions
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Old 07-04-2011, 06:16 PM   #11
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First, exactly what type of ATF has been added to it over the years? Mercon? Generic ATF? If the ATF was not ATF+3 or ATF+4, the wrong ATF was used which can cause abrupt shifting.

Or could anyone have jacked around with the TC (kickdown) cable that runs between the throttle body lever and the transmission? If that cable is adjusted too tight, it will cause hard/abrupt shifting.
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Old 07-04-2011, 07:48 PM   #12
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Well not to contradict but if that's so, then someone has messed with my kickdown cable also, because mine did it from 60k (when i got it) till 115k on first tranny, and now got 800 miles on reman. Tranny with 39k miles and does the same, just something ive got used too.
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Old 07-04-2011, 09:30 PM   #13
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Jerry's right. And I know from personal experience. If the TV cable is not adjusted perfect you will either have a trans that shifts so mushy it will actually chatter, or shift so late it slams into gear, and down shift as soon as you leave off the gas.

Ours had an occasional shudder when it shifted into drive at low during in town driving.
I first changed the fluid and filter and flushed the system with ATF4, adjusted the bands, and still had it, I thought it was the torque convertor going bad.

But reading through the manual I found the TV adjustment, and decided WTH.
I checked it and it was was too loose. I adjusted it, and of course went too far, and got it too tight.

The jeep went from slippy to slamming shifts, would take forever in town to go into 3rd, and would down shift as soon as the gas was left off. Readjusted it and found the spot. It now shifts very nice, and no more shudder.

Give the adjustment a try, it's not that hard to do, I had more trouble getting the darn clip off then making the adjustment. Just make sure it's done per the manual.
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Old 07-04-2011, 09:46 PM   #14
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To add to the TV cable adjustment... the correct adjustment for the TV cable is at the precise point all the slack is taken out of it, no tighter than that... just to the point the TV cable is not pulling on the throttle linkage but any tighter and it would pull on it. Too loose and you'll have trouble getting it to downshift. Too tight and it will cause harsh shifting.
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Old 07-05-2011, 01:07 AM   #15
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Hmm I read some info on the TV cable in the service manual when I was gearing up to swap tranny (my first time) it does seem like this new tranny shifts at a little higher rpm than the old one and does take forever to go into 3rd, and wife is outta town with laptop so its gonna be the weekend before I can check out the service manual CD, but is the adjustment on the throttle body or on the tranny? I had one of those "if it ain't broke, don't fix it" state of minds
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Old 07-05-2011, 07:46 PM   #16
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Jerry we only owned it a year and mechanic we took it to did service, so not sure what he used. Now that I read this thread, I do remember it once-n-awhile rev high before shifting. Anyway, if my 01 does the same thing, is this a simple adjustment? And is it TC or TV
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Old 07-05-2011, 07:54 PM   #17
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Yeah its TV, if you look at the throttle body its the one closest to the front of engine, mine does have slack in it, so imma tinker on it Friday, ill let you know the results
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Old 07-05-2011, 08:22 PM   #18
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Quote:
Originally Posted by kfdjason7620 View Post
is the adjustment on the throttle body or on the tranny?
The adjustment is where the TV cable passes through the bracket that holds the cable to the throttle body. I forget exactly how it releases (it has been 5 years since I adjusted mine) but IIRC, you pull a plastic lock piece out to release the outer cable sheath to allow it to be moved in or out as needed.
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Old 07-05-2011, 08:26 PM   #19
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Quote:
Originally Posted by Jerry Bransford
The adjustment is where the TV cable passes through the bracket that holds the cable to the throttle body. I forget exactly how it releases but IIRC, you pull a plastic lock piece out to release the outer cable sheath to allow it to be moved in or out as needed.
Ok and you said not tight but no slack, and as I said earlier I got the service manual but wife has laptop, and will be home Friday, but I may fiddle with it before, thanks for leading us in the right direction Jerry!
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Old 07-05-2011, 08:31 PM   #20
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No slack and taut, but not so taut that it is actually pulling on the throttle lever. Not even a milli-micro inch.

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