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

Join Jeep Garage Today
Reply
 
Thread Tools Display Modes
 
  #1  
Old 03-23-2010, 04:05 PM
Hitchhiking
My Jeep: 2005 3.7L
 
Join Date: Mar 2010
Location: Western NY
Posts: 31
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 0
Jesse is on a distinguished road
Transmission Downshifting Issue...

Hi this is my first post I've checked out several other forums but everyone here seems very helpful, so here I am.

The vehicle is an 05 3.7 with 32,500 miles I have owned it for about a month and have had this issue since day one. The problem occurs when either coasting to a stop or braking coming to a stop. The transmission will downshift hard from 3-2 and sometimes 2-1 causing a small jerking of the jeep and occasionally a light clunk. The most noticeable is the 3-2 shift which happens around 20mph with the engine around 1000 rpm (under braking, not acceleration.) The revs will then jump up to 12-1500 rpm as if the transmission was downshifting prematurely. Around 50 percent of the time the shift is not noticeable, the rest is a mix somewhat noticeable, to downright alarming. Fluids are fine, all up shifts are smooth as are downshifts under acceleration, and the problem is not temperature related. My gut instinct is that it is a programming issue due to the relative consistency but I would like some info/ammo before consulting with a technician.

Thanks!
__________________

__________________
Reply With Quote
  #2  
Old 03-23-2010, 04:13 PM
Scottina06's Avatar
JeepGarage Founder
My Jeep: 2014 6.4L SRT8 WK2
 
Join Date: May 2009
Location: Berea, Kentucky
Posts: 49,088
Thanks: 859
Thanked 933 Times in 667 Posts
Rep Power: 7717701
Scottina06 has a reputation beyond reputeScottina06 has a reputation beyond reputeScottina06 has a reputation beyond reputeScottina06 has a reputation beyond reputeScottina06 has a reputation beyond reputeScottina06 has a reputation beyond reputeScottina06 has a reputation beyond reputeScottina06 has a reputation beyond reputeScottina06 has a reputation beyond reputeScottina06 has a reputation beyond reputeScottina06 has a reputation beyond repute
Garage
Re: Transmission Downshifting Issue...

def. sounds like a tcm issue. There is a tsb for the 4.7 for some similar things
__________________

__________________
SCOTT
The HARDER you work...the LUCKIER you are!
2014 REDLINE red Jeep SRT "BLOODIED Edition" 1 of 1
2013 JKU Wrangler 10A-stormtrooper'ed, JW Speaker and more!
Previous JEEP rides-
2013 Jeep Grand Cherokee SRT-deep cherry
2006 Jeep Grand Cherokee Laredo-inferno red



Twitter-The_Jeep_Guy
Instagram-thejeep_guy

Reply With Quote
  #3  
Old 03-23-2010, 04:13 PM
B.P.O.D's Avatar
RockNrolla/JG Founder

My Jeep: 2008 3.7L WK
 
Join Date: May 2009
Location: Bergen County, NJ / Bushkill, PA
Posts: 14,644
Thanks: 3
Thanked 9 Times in 8 Posts
Rep Power: 16675
B.P.O.D has disabled reputation
Send a message via AIM to B.P.O.D
Re: Transmission Downshifting Issue...

welcome jesse, hopefully one of our jeep gurus will chime in soon and be able to help you out!
__________________
Irfan "Showing off is the fool's idea of glory."
can you beat me in a fight??? http://dreamps.mybrute.com
member of Black, Tri-State, 6 cylinder club 08 Brilliant Black Laredo (JG 3.7L Squad)- k+n 63-1545,magnaflow 10436,mygig(ren), HID's 6k lows, 6k+3k fogs,dual turn leds,led brows,v-led interior leds, cargo led strip, reverse hids, 92 led brake lights, tinted tails,custom powder coated mesh grill, srt sways, 15% tinted windows,illuminated visors,shorty antenna, HH Class III, cargo liner, thule snowboard rack,kayak rack, bike rack

Future mods - color matched side mirrors, black srt reps

My 1-step correction writeup

How To - LED BROW

Reply With Quote
  #4  
Old 03-24-2010, 01:23 AM
05wkguy's Avatar
Member
My Jeep: 2006 6.1L SRT8
 
Join Date: Jun 2009
Location: Regina,Sask,Canada
Posts: 806
Thanks: 1
Thanked 8 Times in 8 Posts
Rep Power: 9280
05wkguy has a reputation beyond repute05wkguy has a reputation beyond repute05wkguy has a reputation beyond repute05wkguy has a reputation beyond repute05wkguy has a reputation beyond repute05wkguy has a reputation beyond repute05wkguy has a reputation beyond repute05wkguy has a reputation beyond repute05wkguy has a reputation beyond repute05wkguy has a reputation beyond repute05wkguy has a reputation beyond repute
Re: Transmission Downshifting Issue...

You say the fluid levels are fine BUT-my 3.7 will do the same thing-with downright violent, part throttle upshifts if the level gets below half way in the safe area on the dipstick. Are you in the safe area or actually full?
__________________
Borla S catback.Stillens. BT catch can. Hemifever tune.
Reply With Quote
  #5  
Old 03-24-2010, 07:42 AM
Hitchhiking
My Jeep: 2005 3.7L
 
Join Date: Mar 2010
Location: Western NY
Posts: 31
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 0
Jesse is on a distinguished road
Re: Transmission Downshifting Issue...

At operating temp the fluid level is about an eighth of an inch below "hot". Completely cold the level is about an eighth of an inch above "cold". Are they really that picky that a tenth of a quart can affect shifting patterns?
__________________
Reply With Quote
  #6  
Old 03-25-2010, 02:45 AM
05wkguy's Avatar
Member
My Jeep: 2006 6.1L SRT8
 
Join Date: Jun 2009
Location: Regina,Sask,Canada
Posts: 806
Thanks: 1
Thanked 8 Times in 8 Posts
Rep Power: 9280
05wkguy has a reputation beyond repute05wkguy has a reputation beyond repute05wkguy has a reputation beyond repute05wkguy has a reputation beyond repute05wkguy has a reputation beyond repute05wkguy has a reputation beyond repute05wkguy has a reputation beyond repute05wkguy has a reputation beyond repute05wkguy has a reputation beyond repute05wkguy has a reputation beyond repute05wkguy has a reputation beyond repute
Re: Transmission Downshifting Issue...

I can always tell when mine is getting a bit low by how it shifts. Gotta get those cooler lines replaced.....
__________________
Borla S catback.Stillens. BT catch can. Hemifever tune.
Reply With Quote
  #7  
Old 03-31-2010, 03:48 PM
Hitchhiking
My Jeep: 2005 3.7L
 
Join Date: Mar 2010
Location: Western NY
Posts: 31
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 0
Jesse is on a distinguished road
Re: Transmission Downshifting Issue...

For anyone interested the issue appears to have been solved with a software update.
__________________
Reply With Quote
  #8  
Old 03-31-2010, 08:27 PM
Member
 
Join Date: Aug 2009
Posts: 20
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 1871
dsalinas is on a distinguished road
Re: Transmission Downshifting Issue...

I had this problem with my 07 4.7 back in the day. I never took it in to get looked at, but there was a very rough downshift around 3-2nd as your describing. the 3.7 has a different tranny though. Either way I would take it to get looked at. Software update should fix the issue.
__________________
Reply With Quote
  #9  
Old 05-24-2010, 09:12 PM
Member
My Jeep: 1999 4.0L WJ
 
Join Date: May 2010
Posts: 5
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 1566
brentseland is on a distinguished road
Re: Transmission Downshifting Issue...

Wha da ya mean If were interested. Of course were interested, thats why were here.
__________________
Reply With Quote
  #10  
Old 12-26-2010, 05:20 PM
lll2for3lll's Avatar
Premium Member
My Jeep: 2005 3.7L WK
 
Join Date: Dec 2010
Location: North Myrtle Beach, SC
Posts: 6,349
Thanks: 487
Thanked 66 Times in 63 Posts
Rep Power: 469761
lll2for3lll has a reputation beyond reputelll2for3lll has a reputation beyond reputelll2for3lll has a reputation beyond reputelll2for3lll has a reputation beyond reputelll2for3lll has a reputation beyond reputelll2for3lll has a reputation beyond reputelll2for3lll has a reputation beyond reputelll2for3lll has a reputation beyond reputelll2for3lll has a reputation beyond reputelll2for3lll has a reputation beyond reputelll2for3lll has a reputation beyond repute
Garage
Re: Transmission Downshifting Issue...

I'm going to be taking my Jeep in next week for the same issue. I'll let you all know what happens.
__________________
Reply With Quote
  #11  
Old 12-27-2010, 09:14 PM
Member
My Jeep: 2006 4.7L WK
 
Join Date: Nov 2010
Location: Columbus, OH
Posts: 33
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 1415
ohioscott is on a distinguished road
Re: Transmission Downshifting Issue...

I have some similar issue with a 06 WK with the 4.7L. The shift is not nice at times. about the same range during a downshift. I have asked the local garage about it before a service and was told there was nothing wrong... I took it in again under a month ago specifically with this in mind and the mechanic drove it around and checked for service notices and told me there was nothing wrong and Jeep has no service bulitins about it. Nothing done either time. I am at a loss.

I will be interested to see if you have anymore luck than I did.
__________________
Reply With Quote
  #12  
Old 12-27-2010, 09:19 PM
lll2for3lll's Avatar
Premium Member
My Jeep: 2005 3.7L WK
 
Join Date: Dec 2010
Location: North Myrtle Beach, SC
Posts: 6,349
Thanks: 487
Thanked 66 Times in 63 Posts
Rep Power: 469761
lll2for3lll has a reputation beyond reputelll2for3lll has a reputation beyond reputelll2for3lll has a reputation beyond reputelll2for3lll has a reputation beyond reputelll2for3lll has a reputation beyond reputelll2for3lll has a reputation beyond reputelll2for3lll has a reputation beyond reputelll2for3lll has a reputation beyond reputelll2for3lll has a reputation beyond reputelll2for3lll has a reputation beyond reputelll2for3lll has a reputation beyond repute
Garage
Re: Transmission Downshifting Issue...

I contacted the Jeep international customer service and they said that it is not normal behavior and will talk with the service department at the dealer. I have a case number and everything.

There was a recall for this issue for the 3.7L. It's code E13. I'm hoping a software update or reprogramming will fix this issue.
__________________

__________________
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
Transmission cooler? sanitarium16 Grand Cherokee - WK 12 06-21-2010 05:59 PM
WJ Manual Transmission Conversion ubiquitousmatt Engine Performance/Intake/Exhaust 0 02-23-2010 04:56 PM
Transmission Flush? JUSToneJEEP Grand Cherokee - WK 45 02-08-2010 12:28 PM
Transmission fluid adesisto Troubleshooting/Problems 8 01-28-2010 06:41 PM
Transmission solenoids replacement oujea Engine Performance/Intake/Exhaust 6 01-02-2010 09:18 AM

Powered by vBadvanced CMPS v3.2.3

All times are GMT -5. The time now is 10:34 PM.


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