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Old 10-06-09, 08:52 AM   #7
Lexus 4 ME
Pole Position
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Join Date: Sep 2007
Location: CA
Posts: 317
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I am not sure about 4th position on the flat highway. I just towed 2700 lbs trailer and on flat highway with 2 people in the car, my RPM was below 2000. When I hit the hill and I put 4 my rpm inceased to 3000. When I was going down hill I put in 4th and it helped significantly.
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