Bucking & lurching in 1st & 2nd gear - Jeep Wrangler Forum
Jeep Wrangler Forum

Go Back   Jeep Wrangler Forum > TJ Jeep Wrangler Forum > TJ General Discussion Forum

Join Wrangler Forum Today


Reply
 
Thread Tools

Please support our sponsors and let them know you heard about them on WranglerForum.com
Old 04-13-2011, 11:05 PM   #1
Jeeper
 
MLaborde's Avatar
 
Join Date: Feb 2011
Location: East Texas
Posts: 427
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?

MLaborde is offline   Quote
Old 04-14-2011, 10:47 PM   #2
Jeeper
 
MLaborde's Avatar
 
Join Date: Feb 2011
Location: East Texas
Posts: 427
24 hour bump

MLaborde is offline   Quote
Old 04-14-2011, 10:51 PM   #3
Jeeper
 
InvertChaos's Avatar
 
Join Date: Sep 2010
Location: NoVa
Posts: 7,935
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.
__________________
|2004 Jeep TJ "Green Machine"|4.0L 5 speed Dana44|33x12.50x15 Goodyear Duratracs|2.5" RC coils + 1.25" body lift|OME NitroSport shocks|4.56 gears|Skid Row Engine Skid|BCC Sliders|Currie AntiRock|
InvertChaos is online now   Quote
Old 04-14-2011, 10:53 PM   #4
Jeeper
 
MLaborde's Avatar
 
Join Date: Feb 2011
Location: East Texas
Posts: 427
Quote:
Originally Posted by InvertChaos View Post
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.
MLaborde is offline   Quote
Old 04-15-2011, 11:20 PM   #5
Jeeper
 
Join Date: Mar 2011
Location: Mulberry/Lakeland
Posts: 21
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.
always2tall is offline   Quote
Old 04-16-2011, 01:10 PM   #6
Jeeper
 
BCowley's Avatar
 
Join Date: Dec 2009
Location: Jessup PA
Posts: 58
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.
BCowley is offline   Quote
Old 04-19-2011, 10:55 AM   #7
Jeeper
 
Join Date: Feb 2010
Posts: 58
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.
stjbg01 is offline   Quote
Old 04-19-2011, 02:06 PM   #8
Jeeper
 
MLaborde's Avatar
 
Join Date: Feb 2011
Location: East Texas
Posts: 427
Quote:
Originally Posted by stjbg01 View Post
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.
MLaborde is offline   Quote
Old 04-19-2011, 03:40 PM   #9
Jeeper
 
Join Date: Feb 2010
Posts: 58
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.
stjbg01 is offline   Quote
Old 04-24-2011, 11:08 AM   #10
Jeeper
 
BCowley's Avatar
 
Join Date: Dec 2009
Location: Jessup PA
Posts: 58
From what I've read doubting (hopefully) it would not be a clutch issue as I just turned 70k miles.
BCowley is offline   Quote
Old 05-25-2011, 02:35 PM   #11
Newb
 
Join Date: May 2011
Posts: 1
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...
stuntgirl is offline   Quote
Old 09-02-2014, 07:34 AM   #12
Newb
 
Join Date: Jun 2012
Posts: 12
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.
sharparte is offline   Quote
Old 09-02-2014, 10:35 AM   #13
Supporting Member

WF Supporting Member
 
Water Dog's Avatar
 
Join Date: Mar 2011
Location: Roseville, CA
Posts: 6,523
Images: 11
Check your transmission mount.
__________________
Dennis
Water Dog is offline   Quote
Old 09-03-2014, 03:51 AM   #14
Jeeper
 
bandman's Avatar
 
Join Date: May 2012
Location: NW Harris Co, Texas
Posts: 54
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.
bandman is offline   Quote
Old 09-03-2014, 10:21 AM   #15
Supporting Member

WF Supporting Member
 
Water Dog's Avatar
 
Join Date: Mar 2011
Location: Roseville, CA
Posts: 6,523
Images: 11
Quote:
Originally Posted by bandman View Post
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.
__________________
Dennis
Water Dog is offline   Quote
Old 09-03-2014, 11:16 AM   #16
Jeeper
 
Juanita2001's Avatar
 
Join Date: Aug 2013
Posts: 46
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!
__________________
Back 2 Back WW Champs !

MURICA

Juanita2001 is offline   Quote
Old 09-03-2014, 11:20 AM   #17
Jeeper
 
DantheJeepman's Avatar
 
Join Date: Jun 2013
Location: Louisville kentucky
Posts: 63
Your transmission mount is probably cracked you will need to take your skid plate off and look under there.
DantheJeepman is offline   Quote
Old 09-03-2014, 06:23 PM   #18
Jeeper
 
billiebob's Avatar
 
Join Date: Jun 2014
Location: Kootenays, British Columbia, Canada
Posts: 746
Does it buck & lurch driving straight or just when turning?
__________________
My Uncles first Jeep was Government issued in 1944..
When all Jeeps were Government issued.
billiebob is offline   Quote
Old 09-12-2014, 04:59 PM   #19
Newb
 
Join Date: Sep 2014
Posts: 11
Quote:
Originally Posted by billiebob View Post
Does it buck & lurch driving straight or just when turning?
This is exactly what mine is doing! HELP!!!
Justin2000TJ is offline   Quote
Old 09-12-2014, 05:06 PM   #20
Jeeper

WF Supporting Member
 
jp2611's Avatar
 
Join Date: Aug 2010
Location: Fort Wayne IN
Posts: 6,950
Quote:
Originally Posted by Justin2000TJ View Post
This is exactly what mine is doing! HELP!!!
Which? Turning or straight?
jp2611 is offline   Quote
Old 09-13-2014, 12:20 AM   #21
Jeeper
 
billiebob's Avatar
 
Join Date: Jun 2014
Location: Kootenays, British Columbia, Canada
Posts: 746
Quote:
Originally Posted by jp2611 View Post
which? Turning or straight?
x 100000000
__________________
My Uncles first Jeep was Government issued in 1944..
When all Jeeps were Government issued.
billiebob is offline   Quote
Old 09-13-2014, 09:08 PM   #22
Newb
 
Join Date: Sep 2014
Posts: 11
Quote:
Originally Posted by billiebob View Post
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
Justin2000TJ is offline   Quote
Old 09-20-2014, 09:22 AM   #23
Newb
 
Join Date: Jun 2012
Posts: 12
Great that there is some chatter on this issue. Do any of you guys with the random 1st and 2nd lurch have a 2 inch lift? I bought the TJ with a 2" OME springs n shocks. For some reason also, likely driveline alignment, the transmission skid has the pictured spacers. What impact does this "mod" have? Maybe I should take these dodgy spacers out.

sharparte is offline   Quote
Old 09-20-2014, 09:25 AM   #24
Jeeper

WF Supporting Member
 
jp2611's Avatar
 
Join Date: Aug 2010
Location: Fort Wayne IN
Posts: 6,950
FWIW ......I also have the OME lift and had the "spacers", although mine didn't quite look like that. I added the JKS BL and MML and removed the spacers. That combination allows me to run 33"s
Attached Thumbnails
Click image for larger version

Name:	20140521_151208.jpg
Views:	20
Size:	222.4 KB
ID:	1500577  
jp2611 is offline   Quote
Old 09-20-2014, 09:47 AM   #25
Newb
 
Join Date: Jun 2012
Posts: 12
Good to see some posts on this frustrating issue. I noticed a similar setup in a quadratec video. Any issue here?

sharparte is offline   Quote
Old 09-20-2014, 09:49 AM   #26
Newb
 
Join Date: Jun 2012
Posts: 12
Quote:
Originally Posted by jp2611 View Post
FWIW ......I also have the OME lift and had the "spacers", although mine didn't quite look like that. I added the JKS BL and MML and removed the spacers. That combination allows me to run 33"s
I'm guessing with the BL and MML that u don't have this lurch issue. Is there a connection? Do u have a SYE? All I want is 33" and a TJ that I can drive smoothly.
sharparte is offline   Quote
Old 09-20-2014, 04:20 PM   #27
Jeeper

WF Supporting Member
 
jp2611's Avatar
 
Join Date: Aug 2010
Location: Fort Wayne IN
Posts: 6,950
I added the SYE when I regeared...however no lurching/ jerking with OME SL and JKS BL/ MML and that allowed me to Run the 33" x 12.5" x !5"s......BEFORE THE SYE........

jp2611 is offline   Quote
Reply

Thread Tools

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
4x4 gear oil AayKay TJ General Discussion Forum 1 02-07-2011 05:18 AM
Jeep YJ 5 speed won't go in gear? Help wolf654u YJ Tech Forum 5 11-02-2010 04:41 PM
Transmission WRANGLERKID19029 YJ Tech Forum 12 04-20-2009 09:15 AM
Speedo gear: Issue semi resolved!!! Timberman TJ Tech Forum 0 02-26-2009 09:33 PM
Transfer case speedo gear change USBrit TJ Tech Forum 5 06-10-2008 08:32 PM



Download our Mobile App

» Network Links
»Jeep Parts
» Featured Product

All times are GMT -5. The time now is 03:03 AM.



Jeep®, Wrangler, Liberty, Wagoneer, Cherokee, and Grand Cherokee are copyrighted and trademarked to Chrysler Motors LLC.
Wranglerforum.com is not in any way associated with the Chrysler Motors LLC