The Inner Working Of A 10,000 Hp Handling Big Black Rear End Explained!

okay we're going to talk about the inner twerking of my big black rear end right i'm sorry i love the the name of that big giant black ran so we're talking about a rear end and a top fuel car we're talking about 12 inch diameter ring and pinion this right here is the ring gear this right here is the pinion what do you think this thing weighs well let's show you so i got a scale here just the ring gear is 19 pounds now the pinion itself 20 pounds you guys see that 20 pounds anyway so 320 gear is what we run in top fuel that's the only gear that we can run a ring gear sets about two thousand dollars and it's kind of built like a ford where it has a a bearing on the back side of the pinion to help it not uh under torque right to pull away from the ring gear because it's spinning the ring gear and the first thing it wants to do is spin it away from the gear so that's what this does it helps support that all right let's go on to what is a connection between the pinion the ring gear that's the spool this is what the ring gear actually sets on the ring gear sets down on the spool you see here you want to say posi track well it's 100 positive track because it's all one piece and it's a one piece axle too so anyway so that's where the ring gear sits it spins the spool the spool inside of it you'll see is splined right there and we were talking about in a previous deal that one side of the axle is longer in between um the gear cuts you know the splines than the other side and the reason why is because the ring gear is clear over here because the pinion is setting here so you want it to be as close to the ring gear as possible you don't want to stay here and drive the axle on this side of the spool and that's how wide you know the the actual case is you know that this sets in anyway so you can see inside the the splines are really close on that side compared to where they are on that side anyway so that means the axle itself is shorter on one side than the other this is a particular axle is a slope is taken out uh it's a steel axle and um this one here you could probably ever not do anything to it it's it's a thicker series of axles they have different thicknesses for how much weight you want to carry so this particular one and this is on the heavy side for sure so this particular one is right around 23 pounds almost so there's a lot of reciprocating weight um you know going through this thing so uh spindle's aluminum by and um so it's pretty lightweight 15 pounds is that what it is yeah 15 pounds so gotta add bolts to that so anyway so the axle you know is going in this and you can see the splines are actually the same on the hubs as it is in this so this here slides down in the spool and the spool drives the axle next thing what drives what drives the actual wheel this piece right here it's called the hub this hub is on actually this is the drive hub this is actually what is rotating out on the spindle so this kind of spindle design has been around for a long time all your dualies and all that kind of stuff have this stylus spindle one tons things like that so this hub this is connected to the center section so this hub goes in on this via a couple bearings they're not small and then those bearings are on this and then they're tightened up with this nut right here and they're pressed up against basically a crush sleeve so you get it pretty damn tight because you don't want this thing you know flopping around on here what happens over time after hitting the gas the axle flexes there's no doubt about it it flexes and what it does is it makes this end out around actually and you can see on the edges on a used one where it's actually hitting uh the side of the spindle and the spindle it's light it's aluminum next thing i want to talk about this drive hub so the drive hub sits on this it bolts down this is how the wheel is kept on of course the lug nuts or lug studs sorry and but what's cool about this and people don't understand is that on normal cars right they're actually drove from the studs the studs is what turns the wheel not in our case we had a situation a a while back where it sheared the studs off and lost the tire and the tire and wheel flew off and it went into the crowd so what they did is they decided to change it more to where it's driving off these lugs the studs just hold the wheel on these lugs is actually what is basically a gear you know uh into the actual wheel and and after this i'll actually grab a wheel and i'll show you how this sits down inside of it so this part here is on the end of the axle so it this is what drives the drives the wheel [Music] so these are one piece weld delta uh ones top fuel wheel and see here we all have to run the same tire a goodyear tire um and this is the opposite side and i was telling you about the how this thing is is driven by the rear end so this is the hub it sets inside the wheel and that's how it drives it does not drive off the lug studs it drives off basically these cogs that are on here so there you go so in a nutshell real quickly that's the inner workings of one of the big black rear ends

Channel: Rob Wendland

Views: 58,834

Keywords: Top Fuel, Horsepower, NHRA, How it’s done, Race cars, Fast, Nitro, Dragster, Learn from me, Rob Wendland, Wendland, Crew Chief, Mechanic

Id: ZLX6bUQV2wo

Length: 6min 58sec (418 seconds)

Published: Sun Apr 04 2021