Over drive
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New User
Joined: May 2003
Posts: 19
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Over drive
I seem to recall an after market bolt on OD for the early Ford Diesel trucks. I am racking up about 700 miles/week on my truck these days and I would really like to drop the RPM at highway speed. Was there such a after market add on or is my memory playing tricks on me again? By the way, it was minus 30 C outside this morning and the truck fired up with out any problems after being plugged in for 4 hours. Who says the 6.9's had cold starting problems?
Posting Guru
Joined: Sep 2002
Posts: 1,897
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From: Northeastern Pa - USA
Gear Vendors can provide an overdrive unit for your truck. I had one on my 88 which had the C-6 trans and the unit worked well for me. I am not sure if there any other companies that provide od units, but I am sure there is other people that can provide info for you. Good luck and keep us posted. Bill
Post Fiend
Joined: Nov 2003
Posts: 21,285
Likes: 15
From: Nutter Fort, WV
www.gearvendors.com
These guys have a nice looking unit, but it only works in 2 wheel drive high range. Install looks fairly easy. about 2600 US dollars.
www.usgear
This unit works in all gears and drive modes, but the install looks like a nightmare revisited. Shorten gas tank, move transfer case, refab linkage to transfer case, front drive shaft longer, rear driveshaft shorter, bend floor pans on crew cabs and on and on.
These guys have a nice looking unit, but it only works in 2 wheel drive high range. Install looks fairly easy. about 2600 US dollars.
www.usgear
This unit works in all gears and drive modes, but the install looks like a nightmare revisited. Shorten gas tank, move transfer case, refab linkage to transfer case, front drive shaft longer, rear driveshaft shorter, bend floor pans on crew cabs and on and on.
Freshman User
Joined: Dec 2003
Posts: 28
Likes: 0
From: portland
I don't know how much of an overdrive you want but quite a bit can be gained by larger tires. Usually overdrives are from ten to fifteen percent over 1:1. Tires that were ten percent bigger around will give you the same thing for a lot less money.
