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romee619, Mechanic
Category: Jeep
Satisfied Customers: 1
Experience:  Let my online troubleshooting skills speak for themselves!
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My 2000 MY Grand Cherokee 4.0 auto gearbox cycles in and out

Customer Question

My 2000 MY Grand Cherokee 4.0 auto gearbox cycles in and out of overdrive when I am out on the open road. It used to go into o/drive with a mighty lurch and a drive shattering bang unless I took my foot off the gas at the right time. This stopped about 1500 miles ago and now it wont stay in gear.
I can switch it in and out of overdrive with the gearstick button OK.
It feels like there is a problem with the `lock-in` or something like that.
Is the box repairable or scrap?
Vehicle has done 131k
Submitted: 2 years ago.
Category: Jeep
Expert:  indy-tech replied 2 years ago.
Name is***** goal is to provide you with excellent service – if you feel you have gotten anything less, please reply back,
Is the O/D light ON or flashing .
Is the check engine light ON when the engine is running .
Did you ever check for malfunction codes .
Customer: replied 2 years ago.
Hello Greg,
O/D light is not on nor is it flashing. It only comes on when I press the O/D button on the shift lever.
The `perform service` message on the overhead console sometimes comes on when I first start up then quickly goes out.
I do not have facilities to interrogate fault codes.
Sorry, not v helpful. I`m afraid.
Somebody told me about a clutch in the gearbox, that performs the `lock-in` for the O/D, cracks and fails to perform correctly - could it be this?
Customer: replied 2 years ago.
I realise we are talking about a 15 year old vehicle here with considerable miles on the clock but I would like to ascertain if it is worth persevering with or to cut my losses and exit left!!
Expert:  indy-tech replied 2 years ago.
Hi . When i get into work i will send you a test sheet on how to check for codes .And give you other possible options on what your problem maybe . Rgds Greg