GMP Racing Products

(also known as a Shuttle Box)

Very strong gearbox, taken from a TransAm Sports Sedan

5 Speed "W" Pattern

Comes complete with a range of spare ratio's, some ok some not ok.

Strong casings, even has the fittings

Was taking 700hp with no worries.

See below for detailed info:

There are several features that make this gearbox special. The main feature is the set of quick change gears at the back of the trans that enables the car to have a simple final drive live-axle with no quick change gearset -less sprung weight, while also bringing the power flow back on vehicle centre and rotating in the right direction. The quick change gears can be installed to either underdrive or overdrive the output. This enables the car designer/builder to pick any engine, tire and final drive ratio they want. Quickchange ratios can be changed while the trans is still in the car. In fact all the gears can be changed in less than 15 minutes.
 The next main feature is the shift mechanism itself. We call it the "Shuttle Shift" or as the trans is now called -"Shuttle Box". Basically the driver has a "W" pattern shift instead of the universal "H" pattern. In other words, on a cross gate shift from say 3rd to 4th, the driver just aims for the gear position and slips it in, there is no distinct jog up-right-up movement to the shift handle, just a straight shot.
Another main feature is the dog gears are all on the pinion shaft- so the inertia is cut down tremendously with only the input shaft, layshaft and the 3 dogrings having to be accelerated or decelerated during shifts.
Several other key features: Low CG. The transmission is dry-sumped. There are 39 gear ratios available ranging from a 2.74 1st to a .94 5th. The gears are all straight-cut with dogs for quick engagement. The weight is 95 lbs, yet it can handle 1000+ hp with 1000 lbft of torque at 8000 rpm.

$7k - Please call to discuss

If you would like any further information on this product, please contact us during business hours or via the website.

Go back