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Old 12-12-2010, 04:19 PM   #2 (permalink)
JasonG
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Join Date: May 2009
Location: Charlotte NC / York SC
Posts: 728

05 DMax - '05 Chevrolet 2500HD
90 day: 18.48 mpg (US)
Thanks: 120
Thanked 56 Times in 52 Posts
I believe I have the same tranny, and I love it.

I got good results putting synthetic and Lucas in the rear pumpkin. I cant give up my 4.10 gears with the trailer though. You should be able to find around 3.5
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I can't understand why my MPG's are so low..........
21,000lb, 41' Toy Haulers are rough on FE!
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