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

Join Jeep Garage Today
Reply
 
Thread Tools Display Modes
 
  #1  
Old 01-12-2014, 06:17 PM
hoffmanestates's Avatar
Member
 
Join Date: Nov 2011
Posts: 995
Thanks: 0
Thanked 5 Times in 5 Posts
Rep Power: 2349
hoffmanestates has a reputation beyond reputehoffmanestates has a reputation beyond reputehoffmanestates has a reputation beyond reputehoffmanestates has a reputation beyond reputehoffmanestates has a reputation beyond reputehoffmanestates has a reputation beyond reputehoffmanestates has a reputation beyond reputehoffmanestates has a reputation beyond reputehoffmanestates has a reputation beyond reputehoffmanestates has a reputation beyond reputehoffmanestates has a reputation beyond repute
p0740

I been reading into this code anything from tps to trans replacement, anyone come across this recently.

02 4.7

Sent from my LG-P999 using Tapatalk 2
__________________

__________________
Reply With Quote
  #2  
Old 01-12-2014, 06:43 PM
Member
 
Join Date: Jun 2011
Location: greasy cardboard box
Posts: 156
Thanks: 0
Thanked 20 Times in 16 Posts
Rep Power: 1866
fnkychkn has a reputation beyond reputefnkychkn has a reputation beyond reputefnkychkn has a reputation beyond reputefnkychkn has a reputation beyond reputefnkychkn has a reputation beyond reputefnkychkn has a reputation beyond reputefnkychkn has a reputation beyond reputefnkychkn has a reputation beyond reputefnkychkn has a reputation beyond reputefnkychkn has a reputation beyond reputefnkychkn has a reputation beyond repute
Re: p0740

from online database:

Case Number: K18805380
Vehicle Issue: Customer may complain of the MIL lamp illumination. Upon analysis, it is determined the MIL is caused by DTC P0740.;Follow diagnostic test procedure as recommended in the service manual. Review recommendations if there are no possible causes remaining.
System or Component: Customer Concern (No DTCs)
Recommendation: Remove the pump and converter, and check for sticking TCC switch or T/C regulator valves in the pump. [Check the valves by removing the retainer and spring, and checking whether the valve will slide freely back and forth under its own weight as the valve body is tipped back and forth] If valves are stuck, clean them. If they're still sticky, replace the pump assembly. If pump is OK, then replace converter. Also, if there is any significant debris in the pump (like coffee grounds in the cooler bypass circuit), then the converter and transmission cooler should be replaced.

have seen these valves stick on a few RFE transmissions.
__________________

__________________
I'd give my right arm to be ambidextrous.
Reply With Quote
  #3  
Old 01-12-2014, 07:12 PM
hoffmanestates's Avatar
Member
 
Join Date: Nov 2011
Posts: 995
Thanks: 0
Thanked 5 Times in 5 Posts
Rep Power: 2349
hoffmanestates has a reputation beyond reputehoffmanestates has a reputation beyond reputehoffmanestates has a reputation beyond reputehoffmanestates has a reputation beyond reputehoffmanestates has a reputation beyond reputehoffmanestates has a reputation beyond reputehoffmanestates has a reputation beyond reputehoffmanestates has a reputation beyond reputehoffmanestates has a reputation beyond reputehoffmanestates has a reputation beyond reputehoffmanestates has a reputation beyond repute
so now I must locate a solenoid pack and replace it

Sent from my LG-P999 using Tapatalk 2
__________________
Reply With Quote
  #4  
Old 01-12-2014, 07:16 PM
Member
 
Join Date: Jun 2011
Location: greasy cardboard box
Posts: 156
Thanks: 0
Thanked 20 Times in 16 Posts
Rep Power: 1866
fnkychkn has a reputation beyond reputefnkychkn has a reputation beyond reputefnkychkn has a reputation beyond reputefnkychkn has a reputation beyond reputefnkychkn has a reputation beyond reputefnkychkn has a reputation beyond reputefnkychkn has a reputation beyond reputefnkychkn has a reputation beyond reputefnkychkn has a reputation beyond reputefnkychkn has a reputation beyond reputefnkychkn has a reputation beyond repute
Re: p0740

no solenoid pack. need to remove transmission. remove and disassemble pump.
__________________
I'd give my right arm to be ambidextrous.
Reply With Quote
  #5  
Old 01-12-2014, 07:20 PM
Frango100's Avatar
Premium Member

My Jeep: 2004 4.7L WJ
 
Join Date: Dec 2009
Location: Brazil
Posts: 4,801
Thanks: 9
Thanked 75 Times in 70 Posts
Rep Power: 525732
Frango100 has a reputation beyond reputeFrango100 has a reputation beyond reputeFrango100 has a reputation beyond reputeFrango100 has a reputation beyond reputeFrango100 has a reputation beyond reputeFrango100 has a reputation beyond reputeFrango100 has a reputation beyond reputeFrango100 has a reputation beyond reputeFrango100 has a reputation beyond reputeFrango100 has a reputation beyond reputeFrango100 has a reputation beyond repute
Re: p0740

To set this P0740 DTC, the TCM is monitoring the engine speed and compares it to the transmission input speed. If a certain difference is monitored over a certain time, the code will be set.
A faulty input speed sensor could already cause this problem. Just swap the input speed sensor with the output speed sensor and errase the DTC. Testdrive to see if it made any difference. if the input speed sensor is faulty, it could give some harsh shifting now as well.
The valves mentioned by fnkychkn could be the problem, but you will have to remove the transmission to get access to that, so would be a last option on my list.
Also a problem with the L/R-TCC solenoid (part of the solenoid block) or a worn torque converter clutch could be the problem.
__________________
Frank

JEEP Grand Cherokee 4.7 Lmtd 2004
HID 8000K in low and fog / Quad Squad member
Monroe Reflex shocks / Pirelli Scorpion ATR 245/65/17 - Transgo reprogramming shiftkit.

VW Beetle 2.0 TSI 2013
My new toy
Reply With Quote
  #6  
Old 01-12-2014, 07:23 PM
hoffmanestates's Avatar
Member
 
Join Date: Nov 2011
Posts: 995
Thanks: 0
Thanked 5 Times in 5 Posts
Rep Power: 2349
hoffmanestates has a reputation beyond reputehoffmanestates has a reputation beyond reputehoffmanestates has a reputation beyond reputehoffmanestates has a reputation beyond reputehoffmanestates has a reputation beyond reputehoffmanestates has a reputation beyond reputehoffmanestates has a reputation beyond reputehoffmanestates has a reputation beyond reputehoffmanestates has a reputation beyond reputehoffmanestates has a reputation beyond reputehoffmanestates has a reputation beyond repute
which is why I want to replace the solenoid pack as the tcc is also combined I believe
I have always had a harsh initial grab from park to D. like that clunk noise but only intermittent hot/freezing don't matter. I cleared the code and ill drive tomorrow. it has 0 connection but I replaced my burnt out tail light bulb and this dtc popped on shortly after.

frango if u know of a part # or name of the solenoid pack let me know so I can start sourcing one.
__________________
Reply With Quote
  #7  
Old 01-13-2014, 03:10 AM
Frango100's Avatar
Premium Member

My Jeep: 2004 4.7L WJ
 
Join Date: Dec 2009
Location: Brazil
Posts: 4,801
Thanks: 9
Thanked 75 Times in 70 Posts
Rep Power: 525732
Frango100 has a reputation beyond reputeFrango100 has a reputation beyond reputeFrango100 has a reputation beyond reputeFrango100 has a reputation beyond reputeFrango100 has a reputation beyond reputeFrango100 has a reputation beyond reputeFrango100 has a reputation beyond reputeFrango100 has a reputation beyond reputeFrango100 has a reputation beyond reputeFrango100 has a reputation beyond reputeFrango100 has a reputation beyond repute
Re: p0740

The solenoid for the TCC is combined with the L/R. Which one it uses depends on the position of the solenoid switch valve in the valve body. So a bad working L/R-TCC solenoid probably also gives a slipping 1st gear.
Did you swap the speed sensors to start with?
New OEM solenoid you can get for a good price at www.electricaladvantage.net, they sell also speed sensors and other electrical tranny stuff, but i also got my both filters from them.
__________________
Frank

JEEP Grand Cherokee 4.7 Lmtd 2004
HID 8000K in low and fog / Quad Squad member
Monroe Reflex shocks / Pirelli Scorpion ATR 245/65/17 - Transgo reprogramming shiftkit.

VW Beetle 2.0 TSI 2013
My new toy
Reply With Quote
  #8  
Old 01-13-2014, 06:24 AM
hoffmanestates's Avatar
Member
 
Join Date: Nov 2011
Posts: 995
Thanks: 0
Thanked 5 Times in 5 Posts
Rep Power: 2349
hoffmanestates has a reputation beyond reputehoffmanestates has a reputation beyond reputehoffmanestates has a reputation beyond reputehoffmanestates has a reputation beyond reputehoffmanestates has a reputation beyond reputehoffmanestates has a reputation beyond reputehoffmanestates has a reputation beyond reputehoffmanestates has a reputation beyond reputehoffmanestates has a reputation beyond reputehoffmanestates has a reputation beyond reputehoffmanestates has a reputation beyond repute
no I haven't swapped sensors yet as I don't have access to a lift and we have ice/snow/ freezing temps, good ol Chicago. once it warms up I will swap sensors and take it for a spin.

Sent from my LG-P999 using Tapatalk 2
__________________
Reply With Quote
  #9  
Old 01-13-2014, 06:37 AM
hoffmanestates's Avatar
Member
 
Join Date: Nov 2011
Posts: 995
Thanks: 0
Thanked 5 Times in 5 Posts
Rep Power: 2349
hoffmanestates has a reputation beyond reputehoffmanestates has a reputation beyond reputehoffmanestates has a reputation beyond reputehoffmanestates has a reputation beyond reputehoffmanestates has a reputation beyond reputehoffmanestates has a reputation beyond reputehoffmanestates has a reputation beyond reputehoffmanestates has a reputation beyond reputehoffmanestates has a reputation beyond reputehoffmanestates has a reputation beyond reputehoffmanestates has a reputation beyond repute
I found the solenoid block update $300. not bad. with this jeep I have learned that what ever breaks on it I go to replace it and it's been replaced already, like my blend doors stopped working, purchased the metal door update, already has them installed purchased a stepper motor still doesn't work. I been trying to replace the Cams with h.o Cams when I was rebuilding the heads machine shop told me it already has h.o CAms installed. this truck has been throwing me off a lot lately.

Sent from my LG-P999 using Tapatalk 2
__________________
Reply With Quote
  #10  
Old 01-13-2014, 07:33 AM
hoffmanestates's Avatar
Member
 
Join Date: Nov 2011
Posts: 995
Thanks: 0
Thanked 5 Times in 5 Posts
Rep Power: 2349
hoffmanestates has a reputation beyond reputehoffmanestates has a reputation beyond reputehoffmanestates has a reputation beyond reputehoffmanestates has a reputation beyond reputehoffmanestates has a reputation beyond reputehoffmanestates has a reputation beyond reputehoffmanestates has a reputation beyond reputehoffmanestates has a reputation beyond reputehoffmanestates has a reputation beyond reputehoffmanestates has a reputation beyond reputehoffmanestates has a reputation beyond repute
so after drive to work, it ran 65 at 1,9-2k when od button was pressed it dropped a gear and pressed again and went to od and rpm go down. maybe just a fluke

Sent from my LG-P999 using Tapatalk 2
__________________
Reply With Quote
  #11  
Old 01-13-2014, 05:28 PM
hoffmanestates's Avatar
Member
 
Join Date: Nov 2011
Posts: 995
Thanks: 0
Thanked 5 Times in 5 Posts
Rep Power: 2349
hoffmanestates has a reputation beyond reputehoffmanestates has a reputation beyond reputehoffmanestates has a reputation beyond reputehoffmanestates has a reputation beyond reputehoffmanestates has a reputation beyond reputehoffmanestates has a reputation beyond reputehoffmanestates has a reputation beyond reputehoffmanestates has a reputation beyond reputehoffmanestates has a reputation beyond reputehoffmanestates has a reputation beyond reputehoffmanestates has a reputation beyond repute
so problem came back

Sent from my LG-P999 using Tapatalk 2
__________________
Reply With Quote
  #12  
Old 01-14-2014, 02:22 AM
Frango100's Avatar
Premium Member

My Jeep: 2004 4.7L WJ
 
Join Date: Dec 2009
Location: Brazil
Posts: 4,801
Thanks: 9
Thanked 75 Times in 70 Posts
Rep Power: 525732
Frango100 has a reputation beyond reputeFrango100 has a reputation beyond reputeFrango100 has a reputation beyond reputeFrango100 has a reputation beyond reputeFrango100 has a reputation beyond reputeFrango100 has a reputation beyond reputeFrango100 has a reputation beyond reputeFrango100 has a reputation beyond reputeFrango100 has a reputation beyond reputeFrango100 has a reputation beyond reputeFrango100 has a reputation beyond repute
Re: p0740

01Grand had this same DTC set and for him the solution was a new torque converter. Read here: Transmission troubles
__________________

__________________
Frank

JEEP Grand Cherokee 4.7 Lmtd 2004
HID 8000K in low and fog / Quad Squad member
Monroe Reflex shocks / Pirelli Scorpion ATR 245/65/17 - Transgo reprogramming shiftkit.

VW Beetle 2.0 TSI 2013
My new toy
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
Trouble code P0740.......Uh-Oh? Jon Krol Troubleshooting/Problems 1 03-04-2012 05:03 PM
Death Code? P0740 Bulkhead Troubleshooting/Problems 4 08-10-2010 03:25 PM

Powered by vBadvanced CMPS v3.2.3

All times are GMT -5. The time now is 09:45 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