Get to Know Our TH400 "GRUDGE WINNER" Two Speed Transmission

Get to Know Our TH400 "GRUDGE WINNER" Two Speed Transmission

It's the time of year when we start reflecting on changes and improvements we want to make for next year, and we know lots of people are thinking about upgrading their cars. We think our Grudge Winner transmission could be the key to a brand new start. But don't take our word for it; we think the facts speak for themselves.
 
Maybe you know that our new two-speed TH400 uses an innovative billet transbrake valve body for second gear usage.
 
Maybe you even know that it works best in cars where traction is limited by tire size, chassis setup, or racing surface, because its numerically lower gear gives the car a lower starting line ratio, allowing for a less violent launch.
 
But we know the real question on your mind is this: How will switching to a Grudge Winner help racers the most? 
 
Not only does the lower ratio soften the launch, but the closer ratios keep the engine RPMs higher after the shift. Keeping the car higher in the powerband where it's making best average horsepower will allow it to run better. Plus, the design aspects of the 400 transmission make it more reliable than a Powerglide above 2800 horsepower!
 
Now that we've got your attention, here are a few other facts to keep in mind when considering the switch.
 
TH400 Grudge Winner by the numbers:
  • Hours to assemble—about 4 hours from component part preparation to final dyno testing
  • HP capacity—as much as 2200 for the first stage, but as much as 4000 with optional upgrades
  • Main line pressure—200-225 psi
  • Most popular first gear ratio—1.48 for most racers, but there are many ratios available. Note: this numerically low ratio isn't possible to achieve in Powerglide transmissions, making this a good choice for certain cars
Posted by Amber Ambrose at 10:30 AM