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Originally Posted by kblum
I just towed a 7 X 16 foot trailer with 3 motorcycles and do not know why so many of you owners rave about their X5's. I have a 2006 4.4 and I was not at all impressed with its towing. I towed the trailer form New Orleans, LA to Panama City, FL and ever little incline caused my X5 to down shift into passing gear and reved up the RPS to 4500 and higher. Sounded like it was going to explode. You definitely can not tow with cruise control unless you are on a level roadway . I had to actually get a running start and then slow my pace to prevent the tremendous down shift. We are not talking about any big hills in Louisiana or Florida. My 2003 Volvo XC90 T6 towed better. I suppose it had a different set up in the rear end of perhaps the 4 speed transmission had somethijng to do with it. How could you possible tow a 20' car trailer with that Viper?
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I'm the guy with the 31 foot 8,300 pound GVWR Airstream which I've towed over 30,000 miles and my 2001 X5 4.4i just turned 90,000 miles.
Your don't have transmission problems, you should just be using MANUAL MODE. I've written about how I use MANUAL MODE which you can look up. In MANUAL MODE the transmission will not "hunt" gears in an effort to maintain speed. In MANUAL MODE you CAN USE THE CRUISE CONTROL (I use it 95% of the time) since MANUAL MODE will allow the engine to be full throttled without shifting (above 60 mph). If you don't use MANUAL MODE when towing you do risk doing damage to your transmission as the constant "hunting" heats/wears the clutches and degrades the transmission fluid.