How a clutchless racing transmission works 

Shifting with that shifter sounds like you're loading a machine gun.

My goodness… The amount of engineering and workmanship to bring these mechanical pieces of art to life is astonishing! We are living in the tail end of mechanical artistry.

I had a Doug Nash in my car for about a decade. If you ever drive a car with one of these, you will never know what its like to truly speed shift. I can see that Mike Long an company have made some upgrades to keep the main shaft from moving around and those splined plates for the end are pretty impressive. If you have an automatic, even with a brake, you have no idea how hard a car hits with a clutch. God Bless the manual transmissions and the people that drive them, it truly is the best.

I can honestly say I had no idea how it worked. I 'thought' I had an idea, but this was great. Thanks for the insight.

Growing up, I called that shifter a Vertigate. We called that type of transmission a Ram-Shift. If you let off the gas, or, the engine stops, it looks like the transmission would throw itself into neutral. Does the shifter lock, or is it designed to decouple, to help maintain control of the car? For drag racing, I prefer a disconnection, to keep from skidding the drive wheels. Definitely NOT for street use. Any transmission with straight cut gears, were called Rock Crushers, because of the distinct whine, accompanied with a rocky sound. Noisy, but very durable. The straight cut gears don't produce the axial thrust loads that the quieter helix gears did. Beautiful transmission! Thanks for the video, My first look inside one of those.

Great video! Love these types of how-to vids and it was explained very well, not too complicated to understand.

4:20 That sound, for a gear selecting, identical with what they did use in NFS game franchise to option selection... and it's basically 420... this video couldn't be any better

When I raced my 1970 SS 396/402 Chevelle in the 80's, I used a Hurst Super Shifter 3 in my car. It had very short throws and a separate shifter with a Lock-Out reverse lever. Back then there was a company that made a 4-Speed in line shifter. You pushed it forward for first, pulled it straight back for second and so forth, but you could do the same thing in reverse to downshift. My question is why doesn't lenco make their shifter so you can downshift all of your gears like the old inline shifter?

Super cool explanation, finally understood how a dog box works and why it doesn‘t have syncho rings

everyone is now a transmission expert

To be honest, I learnt two things here. 1. the racing transmission is DIFFERENT. 2. How it works. Thanks buddy. Keep up the good work. My professors probably skipped on many other things I needed to learn, so will keep an eye for your videos.

Wow, another thing learned. Awesome gate mechanism, very unusual to anyone not involved.

As a mechanical engineering student, I'm just speechless. The amount of effort of mechanical design, material science, thermodynamics and even fluid mechanics calculations-design while the process of making this gearbox just amazes me. It's just beautiful, kinda art in my eyes.

That was an awesome video boys, thoroughly enjoyed every moment of it. 👍 When is another episode of Project Redline coming?

That was informative and understandable. Thank you for sharing!

Interesting. I had not seen inside one before. People complaining about clutchless (you can shift withput a clutch), and I think they missed describing the "sliders" a bit better. They look like they are two pieces. Each piece, on the dog side has one edge of the dog with a square edge, the other with a taper. How I think it works, is if it is in first, then the first slider is engaged. If the then put it in secnd, the second slider is also engaged. This causes the first gear to go faster than the slider and it pushes itself out of gear on the tapered edge, and the same through the gears If it didn't work like this, you could be in two gears at once or there would be a period in the shift where there was a neutral between the gears. It also means that the transmission disengages on overrun.

Used a heel and sequential in a corsa RWD I built for rallying. Totally fantastic. Wish I had one in my s2000. Why Honda went H pattern is beyond me. If they ever replace the S2K I do hope they go sequential.

trying to explain a race trans to someone who doesnt understand how a regular manual trans works gets painful fast. that Vgate shifter was available for all the big 3 muscle car transmissions, my bro had one in a montecarlo with a super T-10 on the street. with a normal synchro trans you can go up and down through the gears as easily as a an H pattern shifter. if he took the clutchless sliders out of that 5 speed and put road race sliders in he could street drive it up and down through the gears. the clutchless option is what makes that box drag only.

I love the sound of switching gears like in this video. Would love to try a dogbox or basically something like this.

Straight cut gears, bet the whine sounds like heaven.

Mr. Gasket was the originator of that shifter mechanism, made almost 50 yrs ago. It was a great unit. Can't find them anymore.

Rotary counter weight right there on the table

1,2,3,4,5 N parachute. Repeat.

Wow this brought back memories You just cant beat a dog box, the multi selector levers are defiantly the best way as well. The rotating selector rod adaptations are just are not as fast. I had an Impala Straight line and that sent many 3 speeds to an early grave.. I finally gave up on straight line shifters after 3 top loaders and several rebuilds behind a healthy SBC. The hours spent making and modifying syncros, well when you don't have money but you have access and time and can use a lathe and a mill. The MR Gasket I had was a nightmare to get just so it wouldn't split syncros but still change quickly. When is the August podcast due, looking forward. Cheers

thanks for showing us how this works! very cool

You might un-nerve yourself if not expecting it the first time you rebuild a standard transmission. I still distinctly remember the sound all those rollers made falling out of the cluster as they landed on the bench... did not think it would be like that, then sh!t gets real.

8:06 i could watch that on loop forever... wierd ASMR....

A kick ass Gearbox = FULLBOOST

Any Fool Boost video is a good video! 👍

I've never seen this trans before....What a great design! Case splits in half longitudinally and everything is just right there. Simple = Best. The only complex thing about it is that gated shifter. I've been in, out, and through perhaps a dozen automatics and 2 manual transmissions and after seeing this vid I hate them all. lol

Would be interesting to see a comparison of this type of gearbox and a sequential gearbox with straight cut gears. Both have dog engagement and if both have straight cut gears are there more differences than the gear linkage?

"Clutchless". Just like how the new SkyActiv is "Compression ignition"....with a damn sparkplug...

I have a Cat7 that had a pneumatic in it when I bought it but was just so slow shifting drove me crazy . Ever watch TopGear remember Jeremy Clarkson when he was talking about the trans on the Smart roadster I'd say the trans my car came with was 10x worse . I took it to a trans shop and they said there wasn't anything wrong with it . So I swapped it out for one with mechanical linkage instead of pneumatic . Up side is it shifts quicker . Down side shifting is a little heavier . Wait is that really a down side my mom never wants to borrow it anymore .

Fascinating stuff!

Hold it flat and jerk it hard..Hardest part is pulling it out of gear under load, the ramped dogs and plenty of space between them, lets it hook into the next gear with a bang..Brutal. All those smashable dogs and rings are sacrificial. Also looks like the ramps on the back of the dogs would spit it out of gear if you backed off or engine seized. This gearbox does one thing only, and does it well, smash through the gears one way and hard.

Is that slight ramp on the backside of the dog to allow flat shifting? If not, I can't get my head around getting it out of gear with full load on it

So I gather you can only upshift, not downshift.

I had muncie,s in my time,,these were not available yet,Doug Nash 5 spd.was race trans. Borg -Warner T-10 ,with Liberty gears was used also ,Would love to try a G or a Jericho now,,

What you didn't cover is how the ramps are set up so when engaging a gear, the ramps automatically disengage the prior ratio. However, nice video!!!

Any Constant mesh transmission is clutchless.. just blip the power and shift the lever.. easy.

Never heard a dog box called clutchless I clicked cause I thought they did away with the clutch but nope just a dog box that still has a clutch

That slider with the engaging teeth reminds me of how an impact drill works, of course this tranny should stay engaged once the gear is in.

learning something from fullboost yet again.. how do you "build boost" with a manual at the tree ? perhaps a new video on it?

Great video. Like the explanations re pros and cons. What would a gearbox like this cost in Aus? Keep up the tech and teach vids. can always learn from guys in the know. cheers

That looks far easier to work on then a transmission that needs a press to move the output-shaft to get to the circlip.

Thats a gift from god yo

Pretty cool, I always wondered how it worked.

I want to ask, can the gearbox without clutch be reversed? Thankss

Which clutch does a dog box uses? is it a dry type friction clutch or a wet type multi plate or a cone clutch? plz answer

I am fairly certain these boxes are used in Nascar road course. But ofcourse with a real shifter. Vertical gate shifters have been around a million years.

I never use a clutch anyway up or down, except to start and stop. But don't take it wrong as this has a definite use.

I want to put this in my daily driver mustang.

I like.... but I hate those exterior shift links

I presume the throttle is held wide open and the ignition is briefly interrupted to allow the shift? Is that also operated by the shifter? Saw a drag bike once that had a trans like that except it was operated by an air cylinder and a solenoid valve. The ignition interrupt worked in conjuntion with the solenoid valve.

Is that a Wankel block in the work bench?

Being straight cut gears they will make a lot of noise!!

good explaining thanks man

How does it look when the driver pulls one too many times during gearing and gets it in reverse?

So is there any way to go in reverse without being in 5th

Do you shift at full throttle with no lift or ignition cut? Literally slam it through the gears?

Thanks for the informative video is it sequential gearbox?.

Very clever design, I suppose it eliminates the risk of missing a gear or money shifting whilst in a drag race

Why would you prefer straight teeth gears to helical gears? i thought you would use the second type because of the extended contact arc and the greater tork appliable...

So it's not going to last long due to the sleeve ripping right?

That's what I need on my riding mower,

Can it be use for daily driving

I had a v gate shifter on my Muncie, ba

Now I believe I can make one for me.

Why do so many engines make that stuttering sound at high RPMs, like at the end of this video?

i wouldnt say he knows all about it or shows all... slider wear one example was fine on the drive side where his mate said it was ordinary at start of vid .. it was prob out of the other side and could be turned around as a perfect slider ... ...and the fact he missed on this early design he didnt say it stays in gear while youre driving and fork spreads the pair of what he called sliders with spring pressure that hold them together for purpose of having neutral .to get it into the next gear 1-2 eg

Can you still use the clutch in a serious pro street car to save wear on the Trans?

Why run such a long distance between gears? When the sliders are between gears theres probably 1/4" of play between the gear face plate and slider, wouldn't a much smaller distance be quicker and shortening the system will make it stiffer/stronger?

When you're at rest and going from neutral to first, and both shafts are stationary, if the dogs are not aligned with the slots, how do you shift?

Okay i get it,clutchless you guys mean is for "you dont need clutch when you shift"....... Many guys here think its actual clutch-less=no clutch at all....but turque conv can replace the ordinary clutch,so when you use torque conv+this kind of transmission,you got no clutch.....but still use concept of " clutching"

this is something like the squential gearbox, doesn´t it?

I'm familiar with the road-racing cousin but one thing I'm not clear on that might be different from road-race boxes is, do you shift under full power or the driver has to lift or some automatic system?

there was no explaination why there is no clutch to shift and how the links break from one gear into the other for the higher gear to catch the links and engage

When you say clutchless are saying you don't need clutch to shift or also you don't need clutch to start?

Thank you Sir

SO when you shift, lets say to 4 from 3, the motor go almost instantly from 7000 to 5000 rpm (for example). So the 6 little notch, which engage into the right gear have to resist from the instant deceleration of all the moving part inside the motor (crankshaft, piston ...) How the hell this survive more than 500 km without breaking or producing lot of iron filings ?

Could you theoretically drive this on the street? Down shifting would be a hassle but couldn't you just go from 4th to 3rd by holding up on that lever on the shifter, or just go all the way to the top and go back through the gears while holding in the clutch?

Nice Introduction

Libertys gears makes the best clutch less transmission

The Case splot vertically looks a lot like a Doug Nash / Richmond Gear 5 speed..

Wonder how this compares to SAMSONAS for drag racing

I'm sitting here reading comments and thinking you guys have no idea what you are talking about. *Commentors* This is basically a regular 5 speed transmission with cut down blockers and synco's. You remove half or more of the syncros and blockers and cut them at a specific angle and you do not need a clutch to disengage the tranny most guys use a rev limiter to slightly stop the power to change gears in a dogbox. This is a true clutchless transmission and basically the sliders are not fully locked and the only thing keeping them in gear is power on as soon as power is interrupted the tranny falls out of gear and can be changed, the shape of the slider dictates if you can do this or not. A standard street transmission the blockers and syncros are t shaped and keep the tranny locked in gear while coasting or in and out of throttle stuff, if you drive a manual normally and rest your hand on the shifter *which is really a bad idea btw stop being lazy and take your hand off the handle* the tranny can't come out of gear, these are designed to come out of gear on purpose. The shifter is called a long style shifter as the name on the handle suggests and they run a few hundred dollars or an inline shifter. There is styles of shifter that are v patterns and H pattern but the long style is the fastest of the shifters generally. Basically this is a really beefy version of a ford toploader with an extra gear. I hope this helps dispels some of the nonsense people are typing.

What abt for a gokart or buggy??

V gates been around forever kind of like that gearbox 🤣

Can you daily it?

This would be a good asmr for carguys 4:30

is this what Mike Finnegan used in Blasphemi?

The fth/reverse heim is either loose and or waisted.

Love how an Australian builds em Haahhahahahaah to rights

Do you have to let off the throttle to shift with one of those boxes?

the reverse right after 5th is risky, i can imagine you try to bring it into neutral after 5th and u accidently pull the shifter too hard...

this is a 'dogbox'/'facetooth' (describes the shift clutch style) with constant mesh (this means the counter shaft gears are in constant mesh with the speed gears on the main shaft). what makes this one 'clutchless' (I do not think it is a true clutchless as it appears to still need to break input torque to pull it out of gear unlike a true dual shift fork like the gf2000 from g-force) is the dogs are designed with an overrun ramp on one side that will knock the dogs out of gear. this box can be run with shift clutches that can be downshifted. if I recall correctly this guy has tried both styles and decided to go back to downshiftable dog rings for the street ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-3Me20NEtO0I.html

Feel free to send it to me to test at your leisure!!

is it necessary to relieve the load (take off the accelerator) in order to change the next gear? or is there an ignition cut-off system, such as the "kick shift"?

From Engineering POV, is it possible to put it into everyday Car?

Nice!!