Advice Needed: Engine Light On - Transmission Repair Required

[Jeep Libery_KillJoy]

Hi,

Looking to get some advice here.

My 2006 Jeep Liberty's engine light turned on when i was driving along the highway. I went to multiple shops and said the problem is the transmission and might require some repairs. One of the mechanics said it could be the torque converter which the estimated cost to fix is around 3-5k. He also said that this might trigger more expenses since the engine will be looked at as well. I mean who knows what they might find that needs to be fixed (Im not sure how the process goes but thats what ive been told and i could be wrong on the connection between the transmission and engine.) I still drive it and there's no alarming issues when i drive (city driving). I guess the only apparent thing i see and feel is the fuel efficiency went down and power feels like its not as strong as it was before.

Either way, im torn if i should still invest more money on the liberty considering its age and mileage.

The body of the liberty is still in good condition with no visible rust at 250,000 km. I still have some pretty good tires that i can use for a few more years plus i invested on a good suspension on it too. With all these considered, any thoughts on what i should do my fellow liberty owners?

 

[benibiker63]

Did you check to see what trouble codes it's throwing? The transmission will throw check engine lights. It could just be a simple failing black box under the hood. If you don't have a code reader most parts stores can read it for you and then google it to see what the code is. Post it here too for more help.

 

[Jeep Libery_KillJoy]

Engine - P0700
Transmission - P0740

OBDII Coddes - P0700, P0740

 

[benibiker63]

Engine - P0700
Transmission - P0740

OBDII Coddes - P0700, P0740

I had P0700 after Jiffy Lube used the wrong transmission oil, it should have been ATF-4. It damaged the valve body in the transmission and had to be replaced; this was like 20 years ago. Libertys are very specific on the type of transmission oil they use and adding the wrong type will cause damage. I would suggest changing the transmission oil/filter making sure the correct type is used and go from there. If that doesn't work, yes it could get expensive going forward.

 

[always wrenchin]

I had P0700 after Jiffy Lube used the wrong transmission oil, it should have been ATF-4. It damaged the valve body in the transmission and had to be replaced; this was like 20 years ago. Libertys are very specific on the type of transmission oil they use and adding the wrong type will cause damage. I would suggest changing the transmission oil/filter making sure the correct type is used and go from there. If that doesn't work, yes it could get expensive going forward.

This is a good thread from a while back -

https://www.jeepforum.com/threads/p0740-tcc-failure-solved.3683809/

 

[HoosierJeeper]

That's what led to me getting a trans rebuild back in 2016. Still on the road today!

 

[Phuc Nguyen]

Hi,

Looking to get some advice here.

My 2006 Jeep Liberty's engine light turned on when i was driving along the highway. I went to multiple shops and said the problem is the transmission and might require some repairs. One of the mechanics said it could be the torque converter which the estimated cost to fix is around 3-5k. He also said that this might trigger more expenses since the engine will be looked at as well. I mean who knows what they might find that needs to be fixed (Im not sure how the process goes but thats what ive been told and i could be wrong on the connection between the transmission and engine.) I still drive it and there's no alarming issues when i drive (city driving). I guess the only apparent thing i see and feel is the fuel efficiency went down and power feels like its not as strong as it was before.

Either way, im torn if i should still invest more money on the liberty considering its age and mileage.

The body of the liberty is still in good condition with no visible rust at 250,000 km. I still have some pretty good tires that i can use for a few more years plus i invested on a good suspension on it too. With all these considered, any thoughts on what i should do my fellow liberty owners?

In 2020, my 04 Liberty Limited engine light came on with error code P0700/P0740. I replaced transmission fluid/filter, and valve body, didn't help. Engine light comes on on slight hills or above 60 mph. Last thing I replaced was the torque converter. 40000 miles later still running strong. I replaced mine TC by moving engine forward, enough clearance for the TC to go in.

I live in a development where you cannot work on your vehicle for more than three days in a row, home owners' association boards don't walk their dogs, they are looking for "things" so they can send you a by-laws letter. I need times to make sure things are done correctly. That's the reason I chose to move the engine forward with help from engine hoist.

NOTE: when installing TC, pour 1 1/2 quart of transmission fluid in the TC, and make sure it is seated properly by turning and feeling it catches two notches in the transmission. If installed correctly, the face of converter should be 1/4 to 1/2" beyond transmission bell housing. You should be able to move the TC to flywheel about 1/8 of an inch after engine and transmision are matted. Otherwise damage to transmission will occur. Hope this help. Good luck.

 

[Jeep Libery_KillJoy]

This is reassuring! Thank you!

I love my jeep and i dont want to part ways with it right now.

 

[Jeep Libery_KillJoy]

This is a good thread from a while back -

https://www.jeepforum.com/threads/p0740-tcc-failure-solved.3683809/

Thanks!

 

[Jeep Libery_KillJoy]

In 2020, my 04 Liberty Limited engine light came on with error code P0700/P0740. I replaced transmission fluid/filter, and valve body, didn't help. Engine light comes on on slight hills or above 60 mph. Last thing I replaced was the torque converter. 40000 miles later still running strong. I replaced mine TC by moving engine forward, enough clearance for the TC to go in.

I live in a development where you cannot work on your vehicle for more than three days in a row, home owners' association boards don't walk their dogs, they are looking for "things" so they can send you a by-laws letter. I need times to make sure things are done correctly. That's the reason I chose to move the engine forward with help from engine hoist.

NOTE: when installing TC, pour 1 1/2 quart of transmission fluid in the TC, and make sure it is seated properly by turning and feeling it catches two notches in the transmission. If installed correctly, the face of converter should be 1/4 to 1/2" beyond transmission bell housing. You should be able to move the TC to flywheel about 1/8 of an inch after engine and transmision are matted. Otherwise damage to transmission will occur. Hope this help. Good luck.

Wow, great job!

Im not confident enough to do this DIY so i will most likely be going to a shop for this.

My concern is, considering i already got 250,000kms on it, how long will it last? A previous post seemed like it lasted a pretty long time so that made me feel good.

I’m just in the fence right now if i should invest more in it or get a new vehicle.

 

[nbas]

To my mind, the 42RLE (if you have it) is the most vulnerable part of the Jeep. Although I take care of it changing oil frequently ( I have the PML transmission pan which has a drain plug), I recently had to do a rebuild (OBDII Codes: P0700, P0733, P0846, P0871, P0734)

 

[sota]

Engine - P0700
Transmission - P0740

OBDII Coddes - P0700, P0740

this is what a jeep I recently sold (with full disclosure btw) is doing.
next time he's out of country for a week i'm getting it back to drop the solenoid pack and clean it, to see if that fixes it.
trans was poorly maintained before I got it (never changed in 136k miles... yea brown ugly) so i'm hoping clearing the solenoids fixes it. if not, it's a torque converter replacement eventually.
I can trick enough things long enough to get it to pass inspection, so frankly he doesn't care as he's local driving only for the most part.

 

[sota]

Wow, great job!

Im not confident enough to do this DIY so i will most likely be going to a shop for this.

My concern is, considering i already got 250,000kms on it, how long will it last? A previous post seemed like it lasted a pretty long time so that made me feel good.

I’m just in the fence right now if i should invest more in it or get a new vehicle.

only you can make that call. I've seen several of these run north of 250k MILES (freedom units... that's 402k maple syrups ) and farther.
now will something else expensive break at some point? my crystal ball broke many decades ago.