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Old 04-13-2011, 10:05 PM   #1
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Question Bucking & lurching in 1st & 2nd gear

I've touched on this briefly in another thread but not it's time I buckle down & figure out what;s going on 7 fix it.

My Jeep is bucking in 1st & 2nd gear. I have to work the clutch to keep/stop it from bucking. Even after it's warmed up, if I slow down, put it in 2nd, & try to accelerate/decelerate/drive in 2nd, it will start to buck and lurch.

I'm not losing power, it doesn't die, & I get no CEL. My mileage is good (~ 16-17). I've read on here and another Jeep forum that it could be the TPS or upstream O2 sensor. Without a CEL & codes, how can I tell what my problem is without just replacing parts until I get it right?

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Old 04-14-2011, 09:47 PM   #2
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24 hour bump

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Old 04-14-2011, 09:51 PM   #3
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How long have you been driving it for? Mine bucked and lurched as I was getting used to driving it because I was revving the engine too high and, let out the clutch too fast.
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Old 04-14-2011, 09:53 PM   #4
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How long have you been driving it for? Mine bucked and lurched as I was getting used to driving it because I was revving the engine too high and, let out the clutch too fast.
A few months but it's not a lack of driving skill, there is a mechanical issue.
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Old 04-15-2011, 10:20 PM   #5
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I'm not sure if you and I experienced the same issue or not. I always seemed to have a jump and couldn't really use the accelerator in 1st gear. I usually always started in 2nd and that solved my issue. But a week ago I went from the stock tire to a 33x12.50 and can actually cruise through the parking lot in 1st without jumping all over the place. Not that that's a fix for everyone or even the solution. Just my experience. Good luck.
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Old 04-16-2011, 12:10 PM   #6
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Just my 2 cents...

I too have some bucking in first or second, very random, but also know my tps is dieing a slow painful death, I'll be pretty darn happy if replacing that stops the bucking.
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Old 04-19-2011, 09:55 AM   #7
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I have the same issues with lurching in 1st/2nd. I had to replace my TPS about a month ago (high engine idling and computer error code). The replaced TPS fixed all the engine idling issues, but had no impact on the lurching. I've heard others tell me the clutch is going, but i don't think it is. Let me know if you are able to fix it... would like to know what I need to do myself.
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Old 04-19-2011, 01:06 PM   #8
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I have the same issues with lurching in 1st/2nd. I had to replace my TPS about a month ago (high engine idling and computer error code). The replaced TPS fixed all the engine idling issues, but had no impact on the lurching. I've heard others tell me the clutch is going, but i don't think it is. Let me know if you are able to fix it... would like to know what I need to do myself.
Your problem could very well be your clutch but unfortunately, I have a new clutch.
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Old 04-19-2011, 02:40 PM   #9
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Yes, it likely is. I thought the clutch had been replaced about 4 years ago. Was finally able to find the repair paperwork, and only the cylinders were replaced. Why I had them replace the slave cylinder without also not replacing the clutch is beyond me. I'm just too afraid to tackle a clutch replacement myself, given the Jeep is my DD. Even after reading all the write-ups on clutch replacements, it still seems daunting to me (I'm not very mechanically inclined). So I guess I'll have to shell out the $$... or have a trial by fire.
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Old 04-24-2011, 10:08 AM   #10
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From what I've read doubting (hopefully) it would not be a clutch issue as I just turned 70k miles.
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Old 05-25-2011, 01:35 PM   #11
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I just had a new clutch put in and the lurching started after that and it's only in first and second. I've been driving my car for 21 years since it was brand new - Jeep Wrangler 1990 and have had the clutch replaced before. This time is the first time I've ever experience this lurching and it literally just started about a month after the clutch was fixed. Leading up to it I heard a weird gurgling noise when I would first start the car that I had never heard before. I'm scratching my head on this one and saw the post, so thought I would chime in...
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Old 09-02-2014, 06:34 AM   #12
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Old thread but a relevant topic for me as a new TJ manual 06 owner. My second TJ but previously had an auto. My 06 only has 33K on the clock. It's lurching in 1st and 2nd gear. Not every time I take off though.

Solution? I'm running some fuel injector cleaner thru the fuel.

Fuel pump in tank?

Ideas please.
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Old 09-02-2014, 09:35 AM   #13
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Check your transmission mount.
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Old 09-03-2014, 02:51 AM   #14
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Same issue here after a clutch replacement. I had the flywheel resurfaced instead of replaced. I have since read here that jeeps have a specific spec for resurfacing that the shop I used may not have followed. Could be the cause of my problem . Also, it got better when I got 4 matched tires. I was switching to BFG ATs from a uniroyal (same size but I'm sure the BFGs are heavier and was running two of each) it's way better now.
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Old 09-03-2014, 09:21 AM   #15
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Same issue here after a clutch replacement. I had the flywheel resurfaced instead of replaced. I have since read here that jeeps have a specific spec for resurfacing that the shop I used may not have followed. Could be the cause of my problem . Also, it got better when I got 4 matched tires. I was switching to BFG ATs from a uniroyal (same size but I'm sure the BFGs are heavier and was running two of each) it's way better now.
There is no specific spec for machining Jeep flywheels except that you are not supposed to do it. The only thing you are supposed to do is clean them up a little by hand with some emery cloth, or if heat checked or warped, replace them. They have a slightly dome shape that machining gets rid of.

That said, I doubt it is your problem. Pull your transfer case skid, and check the transmission mount for separation.
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Old 09-03-2014, 10:16 AM   #16
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After your clutch replacements did you guys swap out your pilot bearing ? I did not and I am encountering this issue. I will be dropping my trans and replacing it in....T minus a few hours. My own fault for thinking the current one was still good, and kicking myself for not doing it, but if your are to learn something let it be the hard way so it never happens again!
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Old 09-03-2014, 10:20 AM   #17
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Your transmission mount is probably cracked you will need to take your skid plate off and look under there.
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Old 09-03-2014, 05:23 PM   #18
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Does it buck & lurch driving straight or just when turning?
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Old 09-12-2014, 03:59 PM   #19
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Does it buck & lurch driving straight or just when turning?
This is exactly what mine is doing! HELP!!!
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Old 09-12-2014, 04:06 PM   #20
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Originally Posted by Justin2000TJ View Post
This is exactly what mine is doing! HELP!!!
Which? Turning or straight?
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Old 09-12-2014, 11:20 PM   #21
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which? Turning or straight?
x 100000000
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Old 09-13-2014, 08:08 PM   #22
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x 100000000
Turning!

I read it without the "straight" part because I got excited about the prospect of you telling me what the problem is! Haha

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