Inside the Transmission of an NHRA Pro-Stock
HTML-код
- Опубликовано: 20 май 2015
- Gray Motorsports gives a quick run down on the Liberty 5speed found in their ProStock cars, via Team Valvoline.
Check out TeamValvoline.com for more great content. 
Авто/Мото
The metallic sounds as you shifted through those gears was incredibly satisfying to hear.
“We do a tear down and gear change in about 10min.” My mechanic- “we’ll call you in a couple days... maybe.”
XD I know right
that looks so much easier to work on that the trans we have in our cars lmaoo
Auto Dealership repairs want that comment removed 😂
thats gonna be ahh about 800 for labor and 500 to source parts we only do oem straight from the dealers so you know your in good hands
Not sure if you're aware but when you do the same rebuild thousands of times it becomes easier and you have all the parts required on hand. Not every dealer ship has worked on your nissan Micra, nor do they have the parts on hand kid.
I never knew how these shifters worked. It always looked like a sequential to me but never pulled itself back to center so i knew there was something more to it. This was cool to finally figure out, lol.
Amazing how quick they row through those gears
0:25 Hank car chief (handkerchief?)
Wow I was surprised on how compact and light that transmission is considering the horsepower and torque running though it.
Me too, it looks like the size a Muncie/T10.
When you look closely you'll see two secondary shafts running in mesh with the input shaft instead of one. This alone makes the gearbox twice as strong as an normal gearbox. Then you'll notice the straight-cut gears which makes the gears itself stronger and more efficient.
Straight cut gears are NOT stronger. Infact all else being equal helicals are stronger simply because they have more teeth meshing at any one time.
The real reason they use straight cut is to avoid the axial forces generated with helical gears.
If the axial forces is the weakest point then aren't straight cut gears with no axial forces stronger? That was my point exactly. Therefore not only race cars who prefers efficiency, also most heavy duty machinery who prefers strength uses straight cut gears.
The problem arises when you put alot of torque through helical gears you get big axial loads. Big axial loads require big thrust bearings and a stronger housing - both of which results in added weight.
Added weight is obviously very detrimental to any racing application.
The helical cogs are much stronger, both because of the aforementioned multiple meshed teeth, but also because the shearing plane(not sure what the english term would be) of the tooth is larger.
i love the gear changing sound 😍😍😍
Way cool. Perfect video for showing the basics. Love the shifter. Reminds me of my old Mr. Gasket V-gate. Design was probably taken from it. Thanks for sharing.
The shift mechanism is soo perfect. Mine needed an adjustment after every few dozen shifts.
I figured the oil would be thin, but that stuff looked like water. Love those Liberties!
I love the Liberty 5 speeds. Really brings it back to the driver.
I remember reading where Grumpy Jenkins would grind off every other tooth on the gears in the transmission. It made it easier to shift. Back then they had to use the clutch for every shift.
I think that was a synchronizer modification.
Great video!
Best video I've seen in a while!!
That is a serious setup. Thanks for sharing.
Wow. Awesome info. Never knew they changed the gears every run.
My favorite NHRA class. A lot of work goes on in the cockpit of a Pro Stock car to turn on a win light, not to mention the driver has to have cat like reaction times! Love the class!
It's my favorite too. I honestly never cared at all for the funny cars or top fuel; only the stock cars. Back in the 80s for two or three years there was a class called Factory Modified. It was IHRA and was similar to pro stock but it was small blocks. Those were the best! Winding up those small blocks to insane RPMs and watching them tear down the track just like the big block stock cars was very satisfying.
Way cool Valvoline. Thanks for the quick overview. Love them stick shifts. What's the benefit over a Lenco, besides the extra gear? When the 5 spds came out in the mid to later 70s, I didn't think they were as favorable as the 4 spd Lencos.
NHRA Prostock with that 5 speed transmission is probably the best sound in dragracing...definately in my opinion it is!!!!!
I agree
I agree
+Zironi Miller I like the fuelers but Pro Stock and Pro Mods kick a$$!!
They used 4 speeds in the 60's and 70's prostock racing
I love Pro Stock. When you can qualify 16 cars within a 10th of a second of each other, let the fun begin!
Far out, I'm 70 years old I've never gotten to see the inside of a pro stock transmission fantastic
Absolutely mesmerizing, just awesome
The things we create for a few seconds of woohooo ahh it’s chute time dang it freaking sweet dude
im watching from Dipolog city,Philippines...thank you Sharing your video
NHRA pro stock is #️⃣1️⃣🏆 I don’t feel it’s given the coverage it deserves
That shifter reminded me of my Mr Gasket V gate shifter in a Mopar I had in the seventies.
I had one in my Nova, it was bolted to a Muncie, I had some people look at it & ask if it was a 4X4 cause of the other stick
So is this considered a V gate(vertical gate) shifter or does a v gate operate the same as this shifter?? Cool vid overall & Thx for sharing the knowledge.
Good info Very interesting Thanks for the vid
I watched Dave Connelly @ US Nationals changing gears every round in 2008, he was very, very focused.
So, it is a fully synchronized transmission like a a bike, except it is not sequential? Is there a system where no clutch is depressed to go? Handicapped. Or...I can do an air clutch for starting at tree. I need a better system than what I am doing.
Damn that's a small ass transmission, I figured they would have to be bigger, very interesting video
This man personifies every reason America is the greatest country in the world
Nice vid !
What do you do after 5th? You can’t put it in nutral or down shift too fast
I wonder what year the Pro Stockers went to Liberties? I'm thinking 1996 was still mostly all Lencos. By about 1999-2000, I think they were all Liberty. Not as much in-car camera back then to tell.
Looks like the SS/AH Hemi's use the same transmission .. or Lenco's ...?
WoW ... this is AWESOME ;]
Wow, must take some crazy skills to operate.
is it necessary to use the clutch to shift up?
I want to study like you. you are great I really salute
I want this for my honda city type 2 car what is the pricee?
this is an automotive piece of art.
so where can i get one of those for me 96 escort?
Let me get this right, the two cluster gears on the left and right take up the loads evenly, which makes this gear box twice as strong instead, of one in normal gearboxes, right.
That's the idea behind it yes. The correct terminology for those "cluster gears" is actually countershaft. Mack Trucks have a gearbox with 3 countershafts! It gets to a point where weight and space becomes an issue. The idea of spur gears is to remove the axial load when using helical cut gears, thus relieving the shafts, thrust bearings and gearbox casing of stress. However a spur gear is weaker than helical due to having less tooth contact and will generally have to be of larger construction to compensate. By using helical gears but with a shallow tooth angle you can increase the maximum torque limit but without as much thrust load or as much noise as a straight cut gear. But back to the original point it's just another way to go about increasing the strength of the gearbox... but there are other options out there depending on the application of the vehicle and or characteristics of the gearbox required by the driver.
i think this is the most informative comment ive ever heard thanks
arado240dd yeah, i watched the video too
+Ham94 Great work mate, loved the reply
the size of the thing compared to the performance abuse it takes. is just amazing...
Can this transmission goes on any car cuz it I want that for my car cuz my car is a manual
These guys are mecanics, rare breed these days.
Sir what is mean by gray surface 🤔🤔
Is it sequential, motocycle-like gear box?
Billy Bill yuh
No, it isn't. This transmission uses an external gear shifter, sequential and motorcycle gearboxes use an internal sequential (i apologize for the redundancy here) shifter, usually forks mounted on a shaft, with a desmodromic drum that drives them up and down said shaft and they, in turn, drive sliding gears
No. Straight cut gears like many motorcycles though...
what was the time of the last one?!
how do you refer to this kind of transmission?
13 dislikes? = prius drivers!
Or cars that can downshift and make turns?
Hidhir Abdul Wahab except when you do that you lose speed and et!
Hidhir Abdul Wahab. dumb fuck. go back to your happy tree
Bryan Keith lol. A butthurt Big Mac lover here
13 Ferrari drivers
these is awesome
Some of the comments 🤣🤣🤣 love it! Nothing like banging gears in a liberty;)
Impresionante,que precisión!!!!!
Brutalidade pura!
Go for a revolving gear shift mechanism.
Space saving. Ease to operate.
Can be Hydra/electro/Pnuema/leveraged.
wow now i'am up to date .
The closest competition most reliable running class in NHRA. Not given the coverage it deserves.🏁
Greg Kom Nope I believe they should have stuck with the carburator set up instead of EFI , there would be more teams and a full field on race day . Those v-8 's are amazing up to 1300 + horsepower naturally asperated .
What oil I know he said vavolene but which one exactly?
Interesting transmission explanation. What is the difference between a car chief over a crew chief? Is this some PC culture?
Wow..i am impressed.
Very interesting!!!!
how long does it last?
Mudah dan pantas,tarik dan tolak jer gayezzz... Melompat² der...next
So are they basically sequential shifters?
Are the 2 countershafts just for mainshaft support?
Load distribution for additional torque/power capacity.
does it have a clutch pedal ?
Nice and smart system i like it.
It looks like an enlarged motorcycle transmission. Way cool
Wait how does downshifting work? Do you have to get all the way up to 5th and then go back down? Or does one of those levers do it? Not that you really need to downshift while drag racing but I'm curious.
They kill it on deceleration, drag it back to the pits, and rebuild the transmission after every run. I believe they just reset it to first after they rebuild it
Its the same as upshifting, but u need to pull the small lever up while doing that so the selector goes up and selecting smaller gear.. imo
Very cool!
How do you downshift?
How do you get it into reverse
Got a lever seperate to engage reverse
What could come close to this for the street ?
As far as transmission that could still downshift and corner
Hi Derek. Please contact our Product Support team at: productsupport@valvolineglobal.com.
Or try calling 800-832-6825.
but... how to shift the gear back?
What kind of stick is that??
how is the switch mechanism called? have drawings?
They make the inline shifter for most transmissions that use H pattern. Look up "inline 4 speed shifter" on Hurst.com
Pretty darn cool
How do you down shift
Hank-car-cheif lol
Lol!
Lol good one... took me a minute
That's exactly what I thought lmao
Sick, I wonder how one of these would go in a street car? Jerico's seem to work very well on the street from the NASCAR world
Liberty's work very well in NASCAR.
Using a Liberty's in a street driven application requires a specific technique when downshifting.
Fukin awesome!!! 👍👍👍
OUTSTANDING 🐢🐢🐢
What is this type of transmission called ?
So, it's just a heavy duty motorcycle transmission? Cool.
I agree. Damn near looks like a harley transmission. Main shaft, countershaft, 5 gears, and a case. Not much more. Always wanted to check one of these out. Good video
This transmission is also an sequential trany !
no it's actually a mini Eaton Fuller
Springfieldm14 308winchester Both are true
@@CHEVYK10 mini eaton fuller without the auxiliary part of the transmission;)
Wonder if u can put this in a daily driver
Not practical. You have to go full throttle all the time and cant gear back. for drag racing only
Sir please explain the how to work gear hand
does the ignition have to be killed for milliseconds like an airshifted bike? anyone know
no, full power always
Where did the Lenco go?
And now how you shift back?
Pull the other lever the left side to go into reverse
Oh mighty valvoline, when in the waterbox, for the burnout, do the drivers use first gear or second?
3 to 4th
nhra gold thank you, a question I’ve had for a while now
Did he just say they pull the transmission, tear it down, change gears, fill it up with oil, put it back together, and reinstall it within 10 minutes???
Yes, they are easy to take out, and as you seen when he bolted it back together, the cases are easy to split, and the gears are easy to take out and change. A manual tranny is a lot easier to pull than an automatic.
I wish my T5 was that easy to open up.
It's sequential, small and light-er
Yep. Why can’t we build shit that lasts longer than that?
Meanwhile AAMCO still working on yo shit from 2 days ago 🤣🤣🤣🤣
Can you modify them to run on the street
How do you not need the clutch after start? How does it change gears with that much load on the gears?
Basically, the gears match rpm inside so the load doesn’t change. The dogs inside are cut to grab the gear. If you don’t pull the shift lever hard enough they skip and tear up parts.
@@valvoline I actually watched a video on how these transmissions are able to do this, and yes they get damaged over time and interestingly they do not use synchronizers at all and is really how these gears couple to each other under load. You can not shift a transmission under load that are equipped with synchros, at least I have never been able to do it and is the reason why I could not grasp the concept.
this types of gears doesn't required a clatch?
Why doesnt the clutch need to be used after 1st gear? Surely there is a mismatch in speeds...
well i get that point. I'm talking technically speaking, how can the trans shift under power without breaking?
Synchronized gears, they all spin at different speeds but the sliders that engage every gear also work as a rpm synchronizer
So I’m guessing they don’t even use RTV to seal it?
That is sweet!
Can someone explain why there are two layshafts in this transmission
+Gio Alviz extra strength and support.
yep. time is everything we have