Question about 2002 Jeep Grand Cherokee

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02 GCL tranny problem

02 Grand Cherokee Lerado,The tranny slips in and out of 1st gear and then starts in third gear I had a couple of 02 sensors gone but I have had them fixed.and the engine light is no longer on but the tranny still acts up and trying to avoid replacing the tranny.

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  • shadowwolf71 Jul 16, 2008

    Thanks for the help ,I am leaning towards having the solenoid replaced but I have gone under the truck and played with the wires and the tranny worked fine I am wondering if it could just be the plug to the speed sensor on the side of the tranny??You also mention remanufactured units ??Where would you find those units.

  • Anonymous Aug 28, 2008

    1995 grand cherokee starts out in 3rd. had tranny rebuilt worked well for 2 months now is doing the same thing.

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The transmission in your vehicle is a 5-45RFE model.Check,or have the fluid level checked.I would have the vehicle scanned for trouble codes,and with the scan tool,there is a feature in the data stream called "clutch volume indexes".I always look at those to determine clutch pack wear as a tool to evaluate the condition of the individual clutch packs inside the trans.A way to look inside the trans without removing a single bolt.Backing up to the codes,if there are any,thats the direction the repair will go unless the "cvi"'s indicate otherwise.I have seen shorted out O2 sensors cause transmission shift problems as you had described,but the trans always went back to normal operation after the O2's were repaired/replaced.The solenoid packs i replace with every rebuild, with a remanufactured unit as they are prone to problems also.It is possible to replace the solenoid pack without a rebuild too.The solenoid assembly is located on the valve body,just inside the trans pan.

Posted on Jul 12, 2008

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1 Answer

2005 jeep grand cherokee laredo transmission shifting problems


  • A/T or M/T (auto or stick, gee)
  • if A/T is this the 42RE box>? are you in DRIVE? or 1 or 2 gear.
  • does rpm rise above 3000 rpm > at your attempt? if not ,its a bad engine (weak)
  • is the shift linkage even shifting correctly (movement top and bottom)
  • check levels yet. (and for pink ./red AFT not black-metal flake
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The TCM commads the gear change, there is no valve body brain.
the TCM shifts to second with good inputs to the TCM
if the TCM sees bad inputs it will tell you, SCAN IT.

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ANY SLIPPING EVER in the life of that trans,
will eventually lead to a rebuild

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Most rear drive transmissions, last ten years & transaxles
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Unless you actually back probed the sensors with an oscilloscope
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