Need help please!
#1
Newbie
Thread Starter
Join Date: Sep 2010
Location: Catonsville, MD
Posts: 29
Likes: 0
Received 0 Likes
on
0 Posts
Need help please!
I have a 1998 XJ 4.0 auto trans and when I'm on the freeway in OD (I'm guessing on that part) and press on the gas the RPMs go up then drop back down. What could this be? Any help would be great.
#2
CF Veteran
Join Date: Mar 2010
Location: Georgia
Posts: 1,438
Likes: 0
Received 7 Likes
on
7 Posts
Year: 99 94
Model: Cherokee (XJ)
Engine: I6
Originally Posted by BryDogg
I have a 1998 XJ 4.0 auto trans and when I'm on the freeway in OD (I'm guessing on that part) and press on the gas the RPMs go up then drop back down. What could this be? Any help would be great.
#3
Newbie
Thread Starter
Join Date: Sep 2010
Location: Catonsville, MD
Posts: 29
Likes: 0
Received 0 Likes
on
0 Posts
I don't think it's shifting out of OD right away. When let off the gas then get on it again the RPMs shoot up then fall back down without letting of the gas.
#4
The lockup torque converter temporarily unlocks when you press the gas, then when it locks again, the rpm's drop back down. If you press harder it will unlock the converter AND downshift out of OD.
I am amazed at how many rpms it actually drops when the converter locks. Seems like a bunch more than other vehicles I've driven.
I am amazed at how many rpms it actually drops when the converter locks. Seems like a bunch more than other vehicles I've driven.
#5
Member
Join Date: Jun 2011
Location: All Over Oregon
Posts: 110
Likes: 0
Received 0 Likes
on
0 Posts
Year: 1995
Model: Cherokee
Engine: 4.0
I'm having an intermittent issue like this. The TC locks up when you give it around 20% throttle. like the lockup is delayed. Am I right?
#6
CF Veteran
Join Date: Jul 2010
Location: 802
Posts: 4,930
Likes: 0
Received 3 Likes
on
3 Posts
Year: 99
Model: Cherokee
Engine: 4.0
Originally Posted by schadelh
I'm having an intermittent issue like this. The TC locks up when you give it around 20% throttle. like the lockup is delayed. Am I right?
#7
Member
Join Date: Jun 2011
Location: All Over Oregon
Posts: 110
Likes: 0
Received 0 Likes
on
0 Posts
Year: 1995
Model: Cherokee
Engine: 4.0
sorry, I used TC as short for torque converter, forgot I was on a 4wd forum. No lag on power to drive line, the torque converter locks up when i pass 20% throttle, but not before. The closest thing to hesitation that I feel is when i put the peddle down and I'm going 45 or 50 mph, it locks prematurely (when i pass 20% throttle), lowering my rpm and taking me out of my power band.
Trending Topics
#8
Newbie
Thread Starter
Join Date: Sep 2010
Location: Catonsville, MD
Posts: 29
Likes: 0
Received 0 Likes
on
0 Posts
That sounds about right. The rig is fine until I get around 45-50 mph. Then when i let off the gas and get back on it I expect it to have down shifted out of OD but it doesn't (unless I floor it)...and the RPMs rev up then drop with no real acceleration.
#9
Senior Member
Join Date: Apr 2010
Location: Marshall, WI
Posts: 720
Likes: 0
Received 1 Like
on
1 Post
Year: 1994
Model: Cherokee
Engine: 4.0L i6
Sounds like You need to adjust the kick down cable. It's attached to the throttle body. Sounds like you need to tighten it down some to take up the slack.
#11
Newbie
Thread Starter
Join Date: Sep 2010
Location: Catonsville, MD
Posts: 29
Likes: 0
Received 0 Likes
on
0 Posts
Adjusted to kick down cable. Still have the same issue. In OD I'll let off the gas and then when I get back on it the rpms will shoot up then drop down.