Hypershifter is a Valve Body modification designed only for Chrysler Transmissions made from 1956 - Present, which makes the Torqueflite Automatic Transmission, front wheel drive or rear wheel drive, one of the sweetest street transmissions you will ever drive.  Sweeter than driving manual transmissions too.

Hypershifter opens up the Torqueflite's kick down function so that the transmission shifts down a gear, or two, rather than lugging the engine and heating the transmission fluid.  This gives longer transmission life.  The vehicle feels lighter, quicker and more powerful.  The downshifts feel natural, putting the transmission into the gear a good manual transmission driver would put the vehicle in for a given speed and acceleration.  Being an automatic, the car is in the right gear at the right time without you having to think about it, so you can concentrate on the road.
With the extra shifting that the transmission will be doing, it is essential to firm up the shifts so that the transmission has a long life.  All Hypershifter Valve Bodies are programmed to have at least a RV - stage 1 shift.  Firmer shifts are available upon request, see below for more about Shift Feel.

By comparison, Transgo, B&M and Fairbanks shift kits modify the Valve Body about 30% as much as the Hypershifter modification, because those kits deal mostly with shift feel rather than overall drivability.  Hypershifter vastly improves when the up shifts and down shifts occur.

A Hypershifter Shift Kit installs without removing the transmission.   The possible exception to this would be the Premium version of Hypershifter.  The Premium version of Hypershifter has virtually zero overlap on the 2 - 3 and 3 - 2 shift, which works best when the front clutch is modified for lightest possible piston spring pressure.  The light front drum spring pressure gives a much better seat of the pants feel on the 2 - 3 gear shift.

As one customer put it.  "This is the way the car should have shifted from the factory."

A former stick shift driver put it this way "It's like the car is reading my mind, just when I was reaching for the shift lever, out of habit, the car was shifting into the gear I would have put it in."

Few Chrysler automatics had part throttle downshifts until 1971. Downshifts were done by manually shifting the transmission, or putting the accelerator to the floor.  Even after 1971, part throttle downshifts require the accelerator to be aggressively pushed before the downshift occurs, and only shift the transmission from 3rd down to 2nd.  Hypershifter increases the sensitivity of part throttle downshifts and extends them all the way to 1st gear.  The kick down sensitivity is adjustable by adjusting the kick down linkage or cable.

Shift Feel

The Hypershifter shift kit includes reprogramming the transmission for firmer shifts.  RV or Street/Strip performance can be specified.  Brauer Engineering has spent many hours refining the shift kit so that the transmission does not bind up between gears.  This causes the inertia of the engine to go to the wheels when the transmission shifts, giving a good seat of the pants slingshot feel.

A premium shift kit is available which virtually eliminates the 2nd to 3rd gear overlap while maintaining fully automatic operation.  The Premium Valve Body can actually slingshot the car forward while laying rubber on a 3rd to 2nd gear downshift, depending on the vehicles weight, power and gear ratios.  The Premium Shift Kit works best when the transmission is removed from the vehicle and the front clutch spring pressure is reduced - see Premium Shift Kit Installation on the Torqueflite Tips page.

The Hypershifter shift kit is sold as a complete valve body (see pictures  top right of this page).  All you have to do is identify your transmission model and year, or send in your valve body to have it reprogrammed, and specify the engine (power) and vehicle (weight).