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Old 05-06-2017, 05:08 PM
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Tyre pressures (Towing)

Hi folks,

Just bought a caravan for my Jeep to pull along, she's already fitted with what I believe is the factory fitted tow bar and I'm running with 245 70 R 16 tyres on standard alloys, I've been right through the Haynes workshop manual also the owners handbook and taken a look at the info label on the door shut but cannot find anything that tells me what tyre pressures I should be running with under towing conditions, I always have 33 p.s.i. all round running solo but was wondering what, if anything, any of you guys do when towing? The caravan has a max permitted laden mass of 1500kg but mass in running order with no user payload is 1248kg, I guess we would be fairly close to the max figure when we get under way especially with my Wifes' gear on board! I've been on a few caravanning forums but opinions differ for example some say just a couple of p.s.i. extra in just the rear tyres, (Would this have a detrimental effect on the 4wd system?). I also have another question concerning towing to do with an auxiliary transmission oil cooler,(My Jeep doesn't have one!) but I think I ought to be posting that one in a different part of the forum? Year 2000 Jeep Grand Cherokee 4.0 petrol coupled to Quadra Trac II 4 speed auto with overdrive.
Thanks for any info or experiences any of you can provide!

Best wishes,

Jim.

P.S. I think I should add that the max nose weight on the tow ball is 140kg but i'll probably be running with closer to 100kg, thank you.

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