Anyone using a Gear Venders O/D unit?

I have been using GV for more than 20 years now and on many different apps, trucks and race cars.

Then i became a dealer and since then have done hundreds.

Depending on the vehicle use you could save enough gas to pay for itself in a year...
I did with my truck back in 87 saving more than a tank a week, and trips to the track saved a tank each way, paying for the GV in less than a year....
Remember what gas prices were in 87? like a 1.18