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Old 05-24-2006, 11:30 PM   #1
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'04 Unlimited Automatic Transmission Question

I am towing a 3,000# camping trailer with my '04 Unlimited (3,500 tow rating) and am uncertain as to what is normal automatic transmission expectations. I have always had manual shifts which, to me, are so much easier to manage when towing. My problem is that the transmission drops into low gear and jumps to 4,000 to 4,200 RPMs when climbing 4-6 degree grades on the mountains in our area. I find it's necessary to maintain that level of RPMs for anywhere from 2 to 11 miles distance uphill. Is that continuous uphill demand a problem? I also use the Wrangler off road as well and certainly don't want to do it any harm. I'm probably a bit overcautious about all this and know how tough Jeeps can be, but my lack of experience with automatics requires I ask for your help. The engine doesn't seem to overheat but I don't know about the transmission. I am uncertain about the use of a transmission cooler in light of my offroad use. Any advice is most welcome. Thanks!

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Old 05-25-2006, 08:26 AM   #2
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Redline is 51-5200 rpm. If it were me i would lower my speed to try and keep the rpm's around 33-3500 for a long sustained period. To avoid overheating the tranny avoid letting it shift up and down by disengaging the overdrive and use the shifter to hold it in the lower gears. 3000 lbs is within it's capacity, but depending on how often you pull you may want to install a cooler. At least change the fluid more often than is calls for.

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Old 05-27-2006, 12:24 AM   #3
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Thanks!

Thanks for the information. It's appreciated. We're heading out this weekend and I'll let you know how it goes. Again, thanks!
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Old 05-27-2006, 12:42 AM   #4
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Quote:
Originally Posted by kbart
depending on how often you pull you may want to install a cooler.
It already has an external transmission cooler.
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Old 05-27-2006, 09:45 AM   #5
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Thanks Jerry
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Old 06-13-2006, 09:17 PM   #6
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Thanks!

Hey, kbart, the advice was indeed helpful. Drove it through the mountains including one 5 mile grade (coming and going) as suggested and had no problems whatsoever. Thanks again!
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Old 06-14-2006, 07:58 AM   #7
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Glad I could help.

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