Gear Vendors overdrive unit can give your Mopar up to twice the forward gear ratios, unparalleled performance and the ultimate in horsepower handling of any auxiliary transmission. There is no competing underdrive or overdrive transmission available on the market that will give you the performance of a Gear Vendors. If you own a car with a TorqueFlite 727 or 904 3 speed auto or a 4 speed 833, you own one of the best transmissions ever built. By adding the Gear Vendors you get to keep this great trans and add overdrive and performance gear-splitting ratios to it. You will then have a 6 speed Semi-Automatic that is just the best performing, most durable transmission package out there. Big increases in fuel mileage (typically 22-28%) and performance while also increasing the fun factor, 6 gears are cool. Horsepower aside, there are several other reasons you will prefer a GEAR VENDORS to any factory overdrive automatic or manual. You will have a dashswitch that allows both manual and automatic operation. With the switch in “auto” the vehicle will act just like it came from the factory with overdrive. The overdrive will kick in at 47mph or whatever the eprom is set for in our electronics and turn back off at slower speeds without attention of the driver. The ratio is .78 to 1 (see Final Drive Ratios). This equates to 28.6% faster vehicle speed at the same rpm or take your existing rear gear multiplied by .78 (ie 4.10 X .78 = 3.20). In this example a vehicle with a 4.10 behaves just like it had 3.20s when the overdrive is engaged. Other examples would be that 3.55 becomes 2.77, 3.23 becomes 2.52. With the .78 to 1 ratio you’re good with any torque converter you choose for high performance street/strip use.
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