I had one on my '86 F-350 4x4 Crew Cab. It had a 6.9 and a 3 sp auto and 4.10:1 gearing. The GVO helped immensely across the board in pulling power, highway cruise speed and fuel economy.
It wasn't cheap, I think it was $2600 installed. If I remember right it was a .87 OD and effectively turned the 4.10 to a 3.20 and I saw an 18% rise in fuel economy.
If I had it to do over again I think I would go with the Liberty OD box. It was set up to go between the transmission and transfer case to be able to use all the gears in both 2x4 and 4x4 modes. It would be more expensive requiring more mods but I think it would be more versitile.
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Today's Featured Article - Women and Tractors - by Teri Burkholder. The View from the Garage - Never a doubt, everything on our farm is a learning experience. I've been working very hard to get our two rundown Farmall A's sanded, primed , bondo�d, fiberglassed and painted before our big local tractor show called the Tulip Festival. My husband Ben came in the garage one rainy day to see if he could "help". Well if you knew Ben you wouldn't want him anywhere near your spray gun, fiberglass or bondo! So I pulled out the 2 old yucky looking magne
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