2013 5 speed grand cherokee P0741

[Simmo1987]

Hi,
So recently i notice sometimes when going up a hill while towing the power starts to drop, revs dont increase like nothing slipping, can put foot down more and nothing happens, but after about 3-5 seconds it then finally seems to drop a gear and shoots off very hard and gives this fault p0741 torque clutch converter circuit performance. Then it only stays in 4th gear not going to 5th and the torque converter also doesnt lock anymore until i stop and cycle the ignition.
Its also happened now once again going up a hill while not towing too.
It has a diesel tune which im thinking of reverting to standard to try diagnose as when it does eventually drop a gear it shoots the rpm to about 2000 which is the peak of most torque set by the tune.
Fluids have been changed in transmission with original mopar oil and still no improvement.
See attached screenshots of the fault
Any other ideas?

[drover]

How may kms up on the rig ??

How often has the tranny been serviced ?

Fault seems to point to either the electronic plug might be contaminated with oil/moisture or a build of gunge in the box which can happen if it only gets the specified service's, could be a dicky TC module though ......... thats assuming the oil level is correct and the right tranny fluid was put in....

oh no screen shots.................

Jeep Jeep DTC P0741

Make:
Jeep
Code:
P0741
Definition:
A/T Torque Converter Clutch Circuit Performance
Description:
While in Slip Mode operation, the TCM detects TCC slippage greater than a calibrated value
Cause:

TCC hydraulic control circuit
Lockup control valve sticking
Torque converter
TCC solenoid
Internal transmission
Valve body
TCM

[Simmo1987]

Originally Posted by drover

How may kms up on the rig ??

How often has the tranny been serviced ?

Fault seems to point to either the electronic plug might be contaminated with oil/moisture or a build of gunge in the box which can happen if it only gets the specified service's, could be a dicky TC module though ......... thats assuming the oil level is correct and the right tranny fluid was put in....

oh no screen shots.................

Jeep Jeep DTC P0741

Make:
Jeep
Code:
P0741
Definition:
A/T Torque Converter Clutch Circuit Performance
Description:
While in Slip Mode operation, the TCM detects TCC slippage greater than a calibrated value
Cause:

TCC hydraulic control circuit
Lockup control valve sticking
Torque converter
TCC solenoid
Internal transmission
Valve body
TCM

Ohh not sure why the pics didnt upload, but yes that is the code i was getting, so the gearbox was a replacement that i was told from wreckers was about 80k old, when it was serviced since ive had it the tranny shop said fluid etc looked all good when drained. Where is the TC module located and is it kind of easy to try clean out the electric plug on transmission?

[Treebreakerbob]

Originally Posted by Simmo1987

Hi,
So recently i notice sometimes when going up a hill while towing the power starts to drop, revs dont increase like nothing slipping, can put foot down more and nothing happens, but after about 3-5 seconds it then finally seems to drop a gear and shoots off very hard and gives this fault p0741 torque clutch converter circuit performance. Then it only stays in 4th gear not going to 5th and the torque converter also doesnt lock anymore until i stop and cycle the ignition.
Its also happened now once again going up a hill while not towing too.
It has a diesel tune which im thinking of reverting to standard to try diagnose as when it does eventually drop a gear it shoots the rpm to about 2000 which is the peak of most torque set by the tune.
Fluids have been changed in transmission with original mopar oil and still no improvement.
See attached screenshots of the fault
Any other ideas?

My thread “loss of power” is worth a read, ok same shit I get, try having fuel economy on in evic and see it your instant fuel consumption drops back as you push the accelerator pedal down or won’t go above 20 Ltrs (it’s like a safety mode). With mine I have never had any codes or lights come on. Twice I have had my gearbox rebuilt and the problem has gone away but comes back some ten thousand kilometres later. I recall my car starting this shit from 20,000 k’s but only fleetingly, also you put your foot down and have this lack of power then a few seconds later off you go, as I said I have never had any codes or lights and the dealers were of no use as nothing was logged although one brave workshop manager said if I find out what it is he would like to know as he had two other cars doing the same thing
Bob

[Treebreakerbob]

Interestingly your code is outside of calibrated slippage of the torque converter clutches but you are not experiencing over reving as I don’t either. Mine is good until the gearbox warms up and then it starts to play up. When the first gearbox was going you could feel the lack of power kick out (lol) when the gearbox temp went above 65 degrees C

Bob

[Simmo1987]

Originally Posted by Treebreakerbob

Interestingly your code is outside of calibrated slippage of the torque converter clutches but you are not experiencing over reving as I don’t either. Mine is good until the gearbox warms up and then it starts to play up. When the first gearbox was going you could feel the lack of power kick out (lol) when the gearbox temp went above 65 degrees C

Bob

Have you been able to fix it or improve it?

[drover]

Here's Bobs thread http://www.ausjeepoffroad.com/forum/...=loss+of+power

The electronic plug is front RH corner of the box, probably not the issue but worth checking, oil or moisture in there can be problematic... don't remove the socket in the casing though, it bolts into a very expensive circuit board, the plug is okay to remove and look at ..... The Transmission Control Module not to be confused with the TCCM I can't remember where that is on the 5 speed wK2 but someone will chime in.....

I have been told by an auto shop that oil can be clear looking but crud build up in galleries slows the flow so oil levels in areas isn't enough and things go to sh*t and a bench strip and clean needed luckily mine having 40K km changes didn't have the crud..............