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Old 07-25-2008, 01:15 AM   #31 (permalink)
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Danger Ranger - '01 Ford Ranger Edge 4x4
90 day: 14.52 mpg (US)

Moms car - '05 Ford Freestyle Limited
90 day: 21.92 mpg (US)

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Belly pan and side skirts would work well. And i'm thinking it has the good ol' reliable C6 trans. and probably a Sterling or Dana rear axle. You should be able to find an AOD trans for it and it would be a bolt in, then just have to figure out the computer portion which can be a simple control box.
as a side note, your trans doesn't sound right. i think the C3 trans way back in the early 60's was RPM shift sensitive. A c4/c6 should be from load. You might have some problems inside of it, like the valve body is gummed up.

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Old 07-25-2008, 09:26 AM   #32 (permalink)
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2k2Prot5 - '02 Mazda Protege5
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Thanks for the advice. Maybe next spring I'll take this thing to a truck shop for a total overhaul. This year's budget is pretty dry and it does still drive, i just need to go slow. I'll try to source a rebuilt or junkyard 4OD over the winter, and at that time, maybe pre-calculate my gearing for optimum highway travel.
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Old 07-25-2008, 04:02 PM   #33 (permalink)
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Toyauto Pickup - '94 Toyota Pickup 2WD
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Your best fuel efficiency will be found at the slowest speed you can go and still have your transmission in the highest gear. There might be some additional gains to coasting down hills and general pulse and glide type driving, however I can understand your concern for the transmission, I probably would not do it with an automatic either.
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Old 12-28-2008, 10:55 PM   #34 (permalink)
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The Clunker (retired) - '90 Honda Accord EX sedan
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Originally Posted by MazdaMatt View Post
I have a 94 Ford F350 chassis with a 20' (that's big) box on it. I use it for hauling my race car to the track because I can sleep in it and the car is out of the elements.

This thing is HORRIBLE on gas. Not only is it a rolling brick (it has a bubble on the box over the cab, but still). It has a 7.3L non-turbo deisel V8 and a 3-speed transmission that shifts by RPM, not by engine load (so i can cruise at redline in city traffic for some reason). Redline in 3rd gear is about 115km/h.

I learned that I can get about 30-50% improvement by going 90 instead of 115.

How the heck else can i sqeeze mpg out of this thing? I try to only stop once at stop signs and I try to time lights. If i try to coast it slows down SO fast that it isn't worth coasting.

HELP ME! It costs me about 100 dollars in gas to go to a race track, then back to the shop.
I just found this thread because it was mentioned elsewhere. You may want to go on the Ford truck forums and see if somebody knows what's wrong with your transmission. It could be as simple as a cable or wire that's disconnected. I've never heard of an auto from the factory that doesn't shift until redline. That would make a huge difference in both economy and engine life.


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