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Old 09-01-2010, 05:02 PM   #1
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My Jeep won't climb steep hills on the highway

Hello all. I am new to the TJ Jeep Wrangler Forum so I do apologize if this issue has been posted before.

I have a 2000 TJ Sport (6 cylinder) that is stock (except that I have upgrade the original tires from 215-75-R15 to 235-75-R15).

Recently, when trying to climb steep highway hills, my jeep loses speed and will not downshift. It just coasts to a slower speed to the point where I need to get into the far right hand lane (the SLOW lane )

When I try and force the accelerator, it jumps 2 - 3 times (like it is going to stall) and will not downshift or rev higher to get over the hill (these are moderately steep hills). If I ever can get it to downshift, it will rev up for 2 - 3 seconds and then return back to the rpm's it was originally at.

I have 135 000kms and have recently changed plugs and cleaned the throttle body in hopes it might help...but no improvement.

My local Chrysler dealer suggests just keep changing perfectly good parts until they find the issue...which I laughed and said...."Do you really think I am made of money??"

Does anyone have any ideas what might be the issues?

The car runs fine otherwise. I have no issues with acceleration, passing or cruising on the highway or city streets.

Thanks for your input and suggestions!

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Old 09-01-2010, 05:34 PM   #2
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I assume you have an automatic transmission? Has it been serviced?

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Old 09-01-2010, 08:45 PM   #3
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I just replaced my transmission filter and fluid on my 04 X with 76,000 miles and it shifts so much better. The 42RLE can slip on steep inclines especially with low or worn out tranny fluid. This may not be what's up with yours but it's a thought.
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Old 09-02-2010, 10:54 AM   #4
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Hi there. Yes, I forgot to mention that I have an automatic transmission. I've had the transmission serviced about a year ago (maybe less than 30 000kms ago). Some are suggesting I install a transmission cooler to help, but the fluids are clean and there isn't any sign of burning or overheating in the fluids. I've had them checked.

Thanks for your comments. I you have any other ideas, I would appreciate it. I really hate being the guy being passed on the hills!
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Old 09-02-2010, 11:54 PM   #5
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If u had ur tranny serviced a while bak u should go bak and complain lol do u have warrenty
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