Current Transmission Designs

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Let's use the factory Eaton 18 speed as our example. 1st to 2nd shift is a 30% drop. Say you shift at 3,000 RPM. That's an 900 RPM drop. If the tires don't break loose, what's taking that drop? Something has to twist / snap. I've talked with guys who claim they can shift without letting up. I then watched them destroy their driveline. Be honest with yourself, it's your wallet. A simple burp of the throttle will save you a ton of head ache. 

There's a LOT of different techniques. Long story short, the harder the part, the easier it shatters. With all the questions on this one subject, I've started to look into it much further. As of 10/14/2025 we offer cryogenic freezing. The process used takes days, not hours. Interested, click here for more info.

Started with 4 options, narrowed it down to 1, that works very well. Depending on rear gear selection, there's always a way to come up with something different. Have an idea you want to try, contact us, and let's see how to make it happen.

This is always a tough one to answer. A transmission is a torque multiplier. How you do it, is what determines the longevity of it. Think of a mountain bike. There's 3 gears up front with 4+ at the rear. Bigger the gear up front the harder it is to pedal, compared to using the smaller gear. You can select several combinations to achieve a certain speed with a certain amount of pressure applied to the pedals. Same thought process is what makes this transmission survive. 

 Air compresses. The more room you give it, the longer it takes to compress. The way the race unit works, there's no need to range anyway. So why have extra stuff?

The first race transmission shifted just like any other transmission. After watching, it became obvious that everyone (racing loaded) was finishing in 5th gear (high side). That requires ranging, which takes time. Why not eliminate it and run a rear gear that doesn't stress the driveline? For those who are 3500RPM+,  welding a plate in the place of the low side synchronizer ring, running 3.70 or faster rear gear in order to avoid ranging, stop it. You're still taring stuff up, I've been watching. There's several trucks doing this. You're shaking your head at this, but still reading. May I suggest 3.90 - 4.33 rear gear with a 1.80 (top gear / low side) in the transmission?

Use the clutch! Maintain RPM with your clutch. The sooner you get moving and off the clutch, the better. The "slipper" style has proven to be the go to. The geometry used in your linkage along with what weight you use will dramatically affect your launch. Learn what gear you can launch in without destroying the clutch. Graph out your mph/rpm to figure this out. Questions, feel free to contact

Once moving, get off the clutch and STAY OFF IT. (Been seeing a LOT of damage from guys who stab the clutch to shift.) Keep slight pressure on the shifter. Burp the throttle (do not mouse trap it). That slight pressure is all you need. If it takes more, you've got something going on that shouldn't.

Try this and let me know your results & thoughts. Feedback is welcome.

Have been working very hard on this! There's several designs currently being tested. The latest does have a very slight rake. There's been enough positive feedback, that we're going to start making these available for others to use. 

These are what I've seen and what guys are saying. When using a pull style, REMEMBER to SLIP it not side step it.

C Class: 2 disc has been proven to last. Some are going to a 3 disc. Balance your flywheel / clutch assembly!!! It works amazingly well.

B Class: 4 Disc Atlas

A Class: 5 Disc Atlas

Units come with:

• Iron clutch (bell) housing. Aluminum for non-race applications
• New yoke will be installed, of your choosing
• Reverse switch
• After dyno oil is drained, 50w AMSOIL is put in.
• You will re-use your pedal shafts. Too many different styles for me to keep track of.

After you get your transmission, there's on going service.

• Any questions you may have - phone call away.
• We will be at several events throughout the year. And will gladly help / answer questions. We have traveled to watch / help customers, when they go out for the first time. 
• At seasons end, get your transmission back to us for inspection. If needed, we can address any issues. Better to find them during winter, than mid-season.
• Ratio changes are limited, but possible. Want to try something different? Can do that. We will go over options. And a timeline.