Question about 2001 Jeep Grand Cherokee

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I have a 2001 Jeep Grand Cherokee 4.0L, 2x4. The transmission has been slipping. The code came up 0740 pointing to the torque converter. I replaced the Pressure transducer, Pressure solenoid in the governor, fluid, new filter and I drove it for a few days. The slipping seemed to be gone. Then the transmission icon on the dash came on. This was the first time it came on, with the prior slipping it did not. The same code 0740 came up again (AutoZone). I drove the vehicle on the freeway for about 35 minutes. At my next stop, I had no reverse and there was smoke coming out of the transmission stick tube. Since that time I have continued to drive it to work about 10 minutes away. I never go over 35 mph. I hear this rubbing, whining sound about seven minutes into the drive. Now here?s the kicker. Yesterday, reverse started working again. if the torque is damaged, should reverse gear be going in and out? and if it is NOT damaged, what sensors or valves or electrical parts need to be replaced? Or is it now time to drop the dreaded transmission? Sorry for so much detail. Thank you in advance.

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  • adjava007 Nov 22, 2009

    I have a 2001 Jeep Grand Cherokee 4.0L, 2x4. The transmission has been slipping. The code came up 0740 pointing to the torque converter. I replaced the Pressure transducer, Pressure solenoid in the governor, fluid, new filter and I drove it for a few days. The slipping seemed to be gone. Then the transmission icon on the dash came on. This was the first time it came on, with the prior slipping it did not. The same code 0740 came up again (AutoZone).
    I drove the vehicle on the freeway for about 35 minutes. At my next stop, I had no reverse and there was smoke coming out of the transmission stick tube. Since that time I have continued to drive it to work about 10 minutes away. I never go over 35 mph. I hear this rubbing, whining sound about seven minutes into the drive.
    Now here?s the kicker. Yesterday, reverse started working again. if the torque is damaged, should reverse gear be going in and out? and if it is NOT damaged, what sensors or valves or electrical parts need to be replaced? Or is it now time to drop the dreaded transmission? Sorry for so much detail. Thank you in advance.

  • adjava007 Nov 22, 2009

    Hello roniecon



    Thanks for your response. I have a couple of questions in my description that maybe you could talk to specifically. What about the reverse in and out. Right now it is still workining. Could a damaged torque manage that.



    Also, since you can see what I replaced, it there any other sensor (input/output, etc) that might need to be replaced before I assume it is the torque. I believe you are painfully correct, but thought there might be something else that would trigger the 0740 code.



    Thank you.

  • adjava007 Nov 23, 2009

    I do plan to accept your solution and give you a good rating, regardless of how you answer this part. But you haven't yet address my question about the REVERSE, which I did ask twice.



    When we removed the pan to put in the sensors, there were no particals and the fluid was still pretty and red. Still I got the 0740 code. But the new sensors didn't help so I was thinking i didn't change enough sensors.



    Now, if the torque was bad and after a 35 mile dirve on the freeway I lost reverse, why did revesre come back? The is the question I keep asking ... about the capability of a broke torque.

  • adjava007 Nov 23, 2009

    Tech was reponsive and adressed most questions.

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  • Jeep Master
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It is no telling what has tore up,but it doesn`t sound good.There is no doubt,that the original code was correct,but the the cause could have been metal particals,that coded it in the first place.I assume the correct ATF was used.This metal,may have lodged in the valve body also,but the tearing down,will most likely reveal worn drum,and clutch pack fail.When the transmission heats back up,I assume the trouble will return.If the torque converter bushing turned,and became out of line,the port for the fluid may be narrowed,or blocked.They have only one fluid port in the bushing,and only one in the pump housing for the torque converter.A tear down is the only way to fix the problem.If this was helpful ,please let us know,sorry it was not more positive,but the truth.

Posted on Nov 22, 2009

  • Ronny Bennett Sr.
    Ronny Bennett Sr. Nov 22, 2009

    I wish that it could be something else,the torque converter would need to be replaced also,because of debris in it,and could be damaged because of metal debris in it.Sensors,are not going to help at this point,The tear down ,and rebuild of the transmission will get you on the road.A total flush of the radiator cooler for the transmission will be a must also.I wish I could give you better news.

  • Ronny Bennett Sr.
    Ronny Bennett Sr. Nov 23, 2009

    The torque converter has no effect on the reverse,sensors do not have anything to do with the reverse.Selection of the reverse has to do with fluid direction,and valves in the valve body.Clutch packs have clutches in them,and seals.cooling down of the transmission,and the heating up,may give you reverse once in a while,pressure loss,causes these problems,and the transmission,power,and shifting are done with the torque converter.I do believe the transmission has been helped,but from what you have told me,it is a pressure problem in the transmission.This rubbing,and whining noise,is not good.Sensors do not cause this noises either.

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  • Master
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Hello. I recommend that you take your jeep into a transmission shop ASAP. The longer you drive it this way the more potential damage is being done. Regards, Joe

Posted on Nov 20, 2009

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