Double overdrive for 6.4
Senior User
Joined: Jun 2004
Posts: 156
Likes: 0
From: Gillette, WY
i am fortunate to have gotten this on my 99. I think it's worth it. Helps me to get places faster w/o chipping. I like on my other thread did 110 GPS MPH. Which is actually the most accurate. It does help in acceleration w/ gear splitting but it does bang gears and allow flare ups in rpm. But all in all it is worth it the rpms drop dramatically. I have 4.10s and at 85 I am doing 1800. That is compared to 60 at 1800. I have noticed the fuel gauge dropping slower at same actual speeds comparatively.
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