I wanted to keep my max towing ability, so I went with a gear venders over/under drive. Yes, a bit pricy, but in the long run, it's been well worth it. When viewing on my scanguage, I've been up to 123mph at 3K rpms (not towing). Takes a bit to get use to the unit, but I find turning it on at 35mph is perfit and smooth. It's about an added 20% overdrive (to keep it simple). Some times I run with the GV and no ford OD, or whatever driveing or towing conditions there is. Bad part is your looking at approx 4K for the unit and pro install. requires driveshaft mods. If you need a photo of it installed, I can get one.
Gear Vendors Under/Overdrive Ford 2-Wheel Drive Manual Transmissions.
Last edited by Brickhouse : 11-05-2008 at 06:57 AM.