Go Back   Jeep Garage - Jeep Forum > Jeep Platform Discussion > Grand Cherokee - WK > Troubleshooting/Problems

Join Jeep Garage Today
Reply
 
Thread Tools Display Modes
 
  #1  
Old 05-05-2012, 10:38 AM
Member
My Jeep: 2006 3.7L WK
 
Join Date: May 2012
Location: Amish Country
Posts: 11
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 913
BiTurboS4 is on a distinguished road
Slight Pulsing Feeling

06 Laredo 3.7L AWD

When just driving around which is up and down a lot. If you are in OD and start to go up a grade, sometimes you can feel a very light, but noticable, pulse (like a really quick downshift/upshift, repeatedly).. not violent, but its almost like the TCM can't decide to downshift to get up the hill, or to stay in OD.

Any idea why and how to fix this?

Truck has 88k and goes in for trans fluid change next week. Both diffs were done a few weeks ago.


Dont want to make multiple threads...

The other issue, when its REALLY hot out and you've been driving for awhile and come to a stop. IF you let the Jeep idle for a few minutes, it will randomly and not consistantly idle down and jerk and then idle back up where its suppose to. it will drop down to 600 or so RPM's, shake for a second and go back to normal. I dont think its stalled on her yet.

Plugs were just done about 5k ago, give or take.
__________________

__________________
Reply With Quote
  #2  
Old 05-05-2012, 10:46 AM
Member
My Jeep: 2006 3.7L WK
 
Join Date: May 2012
Location: Amish Country
Posts: 11
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 913
BiTurboS4 is on a distinguished road
Re: Slight Pulsing Feeling

didn't look hare enough.. found my answer to the first question down the page... second one though still bugs me.
__________________

__________________
Reply With Quote
  #3  
Old 05-05-2012, 10:49 AM
Bleeding Blue's Avatar
Member
My Jeep: 2005 3.7L WK
 
Join Date: May 2011
Location: Indianapolis, IN
Posts: 509
Thanks: 0
Thanked 4 Times in 4 Posts
Rep Power: 27965
Bleeding Blue has a reputation beyond reputeBleeding Blue has a reputation beyond reputeBleeding Blue has a reputation beyond reputeBleeding Blue has a reputation beyond reputeBleeding Blue has a reputation beyond reputeBleeding Blue has a reputation beyond reputeBleeding Blue has a reputation beyond reputeBleeding Blue has a reputation beyond reputeBleeding Blue has a reputation beyond reputeBleeding Blue has a reputation beyond reputeBleeding Blue has a reputation beyond repute
Re: Slight Pulsing Feeling

What answer did you find? I know many of us have the same problem and havent found a solution
__________________
"When my time on earth is gone, and my activities here are passed, I want they bury me upside down, and my critics can kiss my ass!"

- Bobby Knight
Reply With Quote
  #4  
Old 05-05-2012, 10:57 AM
Member
My Jeep: 2006 3.7L WK
 
Join Date: May 2012
Location: Amish Country
Posts: 11
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 913
BiTurboS4 is on a distinguished road
Re: Slight Pulsing Feeling

no real solution.. just the thread about it being common..

since we didn't buy this new, IDK if its osmething that's just going to happen due to the 3.7 being under powered.. or if there actually IS something wrong.

If guys are taking it to the dealerships and they are saying there is nothing coming up as being wrong with it. Even when they test drive it. What can we really say?

We got an aftermarket warranty that covers the drivetrain. I just dont think they are going to replace the torque converter or the trans because we think its the problem.
__________________
Reply With Quote
  #5  
Old 05-05-2012, 11:03 AM
Bleeding Blue's Avatar
Member
My Jeep: 2005 3.7L WK
 
Join Date: May 2011
Location: Indianapolis, IN
Posts: 509
Thanks: 0
Thanked 4 Times in 4 Posts
Rep Power: 27965
Bleeding Blue has a reputation beyond reputeBleeding Blue has a reputation beyond reputeBleeding Blue has a reputation beyond reputeBleeding Blue has a reputation beyond reputeBleeding Blue has a reputation beyond reputeBleeding Blue has a reputation beyond reputeBleeding Blue has a reputation beyond reputeBleeding Blue has a reputation beyond reputeBleeding Blue has a reputation beyond reputeBleeding Blue has a reputation beyond reputeBleeding Blue has a reputation beyond repute
Re: Slight Pulsing Feeling

I dont think it is the trans, mine literally exploded about 5k ago (including the torque converter) and it is still there....
__________________
"When my time on earth is gone, and my activities here are passed, I want they bury me upside down, and my critics can kiss my ass!"

- Bobby Knight
Reply With Quote
  #6  
Old 05-05-2012, 11:14 AM
Member
My Jeep: 2006 3.7L WK
 
Join Date: May 2012
Location: Amish Country
Posts: 11
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 913
BiTurboS4 is on a distinguished road
Re: Slight Pulsing Feeling

Mine doesn't do anything like mentioned in the thread (harsh jerking while driving down the highway).. Mine is more going from flat road to an incline and giving it gas while in OD but not enough to kick it down.. it seems to not know if it should kick down or stay in OD. its a light flutter so to speak
__________________
Reply With Quote
  #7  
Old 05-05-2012, 03:14 PM
Madanio24's Avatar
Senior Member
My Jeep: 2005 3.7L WK
 
Join Date: Jan 2012
Location: Eastern Shore MD/NJ/NY
Posts: 1,953
Thanks: 22
Thanked 29 Times in 28 Posts
Rep Power: 11353
Madanio24 has a reputation beyond reputeMadanio24 has a reputation beyond reputeMadanio24 has a reputation beyond reputeMadanio24 has a reputation beyond reputeMadanio24 has a reputation beyond reputeMadanio24 has a reputation beyond reputeMadanio24 has a reputation beyond reputeMadanio24 has a reputation beyond reputeMadanio24 has a reputation beyond reputeMadanio24 has a reputation beyond reputeMadanio24 has a reputation beyond repute
Garage
Send a message via Skype™ to Madanio24
Re: Slight Pulsing Feeling

That is one of the symptoms of mine. I hardly doubt the answer is that the cars underpowered. After all it never used to happen before. The dealership actually felt my problem and are investigating further. He thinks it's a problem with the clutch in the torque converter not opening correctly.
__________________
Matt
-05 WK Black
Too many mods to list...
-90 Integra GS
Reply With Quote
  #8  
Old 05-05-2012, 03:46 PM
FlyinRyan's Avatar
Senior Member
My Jeep: 2002 4.7L WJ
 
Join Date: Jul 2009
Location: Fort Myers, Florida
Posts: 2,804
Thanks: 33
Thanked 31 Times in 30 Posts
Rep Power: 88663
FlyinRyan has a reputation beyond reputeFlyinRyan has a reputation beyond reputeFlyinRyan has a reputation beyond reputeFlyinRyan has a reputation beyond reputeFlyinRyan has a reputation beyond reputeFlyinRyan has a reputation beyond reputeFlyinRyan has a reputation beyond reputeFlyinRyan has a reputation beyond reputeFlyinRyan has a reputation beyond reputeFlyinRyan has a reputation beyond reputeFlyinRyan has a reputation beyond repute
Send a message via AIM to FlyinRyan
Re: Slight Pulsing Feeling

Did any of you replace the TPS? I thought Madanio did, but can't remember.

I am curious about this problem.
__________________
Due to my workload, please do not PM me as I do not regularly check my PMs. Thank you :)
Reply With Quote
  #9  
Old 05-05-2012, 03:51 PM
Member
My Jeep: 2006 3.7L WK
 
Join Date: May 2012
Location: Amish Country
Posts: 11
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 913
BiTurboS4 is on a distinguished road
Re: Slight Pulsing Feeling

Someone did but it didn't fix the problem.

It's done it the whole time we've owned it. Please lmk what they find out. Having an aftermarket warranty I'll get it fixed.
__________________
Reply With Quote
  #10  
Old 05-05-2012, 06:01 PM
Madanio24's Avatar
Senior Member
My Jeep: 2005 3.7L WK
 
Join Date: Jan 2012
Location: Eastern Shore MD/NJ/NY
Posts: 1,953
Thanks: 22
Thanked 29 Times in 28 Posts
Rep Power: 11353
Madanio24 has a reputation beyond reputeMadanio24 has a reputation beyond reputeMadanio24 has a reputation beyond reputeMadanio24 has a reputation beyond reputeMadanio24 has a reputation beyond reputeMadanio24 has a reputation beyond reputeMadanio24 has a reputation beyond reputeMadanio24 has a reputation beyond reputeMadanio24 has a reputation beyond reputeMadanio24 has a reputation beyond reputeMadanio24 has a reputation beyond repute
Garage
Send a message via Skype™ to Madanio24
Thumbs up Re: Slight Pulsing Feeling

Quote:
Originally Posted by FlyinRyan View Post
Did any of you replace the TPS? I thought Madanio did, but can't remember.

I am curious about this problem.
Yep I replaced the Tps with oem one. The tech said the transfer case is locking up and opening he told me to throw in oem spark plugs and bring it back to him and he's going to look at it for a few days. Will post back because this seems like a fairly common problem. The only thing that helped a little bit was the update on the PCM definitely shifts a lot better
__________________
Matt
-05 WK Black
Too many mods to list...
-90 Integra GS
Reply With Quote
  #11  
Old 05-05-2012, 06:03 PM
Madanio24's Avatar
Senior Member
My Jeep: 2005 3.7L WK
 
Join Date: Jan 2012
Location: Eastern Shore MD/NJ/NY
Posts: 1,953
Thanks: 22
Thanked 29 Times in 28 Posts
Rep Power: 11353
Madanio24 has a reputation beyond reputeMadanio24 has a reputation beyond reputeMadanio24 has a reputation beyond reputeMadanio24 has a reputation beyond reputeMadanio24 has a reputation beyond reputeMadanio24 has a reputation beyond reputeMadanio24 has a reputation beyond reputeMadanio24 has a reputation beyond reputeMadanio24 has a reputation beyond reputeMadanio24 has a reputation beyond reputeMadanio24 has a reputation beyond repute
Garage
Send a message via Skype™ to Madanio24
Re: Slight Pulsing Feeling

The tech diffinatley felt the pulsing driving on his own in the car and doesn't think it's normal at all. Also asked him to use star scan tool to set my headlights to export mode! Super excited lol.
__________________
Matt
-05 WK Black
Too many mods to list...
-90 Integra GS
Reply With Quote
  #12  
Old 05-12-2012, 05:32 PM
Member
My Jeep: 2005 3.7L WK
 
Join Date: May 2012
Location: Rockford, Illinois
Posts: 5
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 905
Maintainer is on a distinguished road
Re: Slight Pulsing Feeling

I also have this problem with our '05 3.7 Rocky Mtn edition.
I changed the TPS and now it's throwing a "P0122" code (low voltage to TPS).
I've been running E3 spark plugs and changed wires about 15k miles ago.
I can hear & feel a grinding when it hesitates. It makes me think that there is slippage in the trans. because I smelled the trans fluid and it has a burnt smell (witnessed by mechanic friend also).
Also had trans & converter flushed about 1 year ago.
I have made a contact with a Chrysler tech and he is going to look at it within the next couple weeks....hopefully all my troubleshooting will have put this in a repairable direction.
__________________

__________________
Reply With Quote
Reply

Thread Tools
Display Modes

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
Surging, pulsing while driving Madanio24 Troubleshooting/Problems 266 10-13-2013 08:04 AM
Feeling on this SRT8? tydallas Grand Cherokee SRT8 - WK 4 03-12-2012 07:10 PM
Pulsing headlights hemijeep8267 Trouble Shooting/Problems/Service 3 02-16-2012 05:34 PM
!!not feeling it!! Dnizzle80 Engine Performance/Intake/Exhaust 13 12-30-2011 04:46 PM

Powered by vBadvanced CMPS v3.2.3

All times are GMT -5. The time now is 08:36 AM.


Powered by vBulletin® Version 3.8.8 Beta 4
Copyright ©2000 - 2014, vBulletin Solutions, Inc.
Copyright 2012 - JeepGarage.Org
The Jeep Grand Cherokee Owners Community