Racer: Slow in fast out Mechanic: Grease in dirt out

Small note: Driveline components should be rated to transmit torque, not horsepower.

Wyatt is a rare talent. Thanks for all the great videos!

what we used to do to the cv's on the vw baja bugs was to take the cv a part and have the cages re heat treated to a rockwell c38 i think and it would make them not to brittle and they would last a lot longer

Outstanding show as always 👍🏼thanks for sharing your knowledge, cheers.

wyatt! your videos are the friggin best, bought a fiesta st because of you guys

You guys are great! Now I won’t complain about my MK3 Focus RS horrible turning radius anymore;-) Thanks

This was interesting, especially after finding out from the service writer at my deslership that the car I daily is starting to sling grease from the CV boots.

i find adding just a couple drops of gear oil to EP2 or 3 axle grease will keep it from drying out inside the boot and allows the grease that is flung outwards while driving to flow back easier through the CV joint

Thanks for all your videos !

I was going on a 300 mile journey, so I inspected my car, and the cv boot was torn. Put some high pressure moly grease in and made a patch out of gorilla tape, worked like a charm! Made the trip with no vibration clicking or complaints while maintaining 75 the whole time. Definitely works in a pinch.

Thanks, I clicked to find a good race “driveshaft”... but now I am well caught up on axles and cv joints.

Quite often the diesel version of the car has a higher torque capacity drive shaft fitted. Ford does a sports diesel variant and I have found the drive shafts to be very tough with almost no failures other than driver errors.

Very good explanation why rear wheel drive is great. I one broke a cv joint on a 75HP VW Golf, guess what, it happened when the steering angle was maxed.

Thank you for your knowledge I am learning alot about different car parts iv only got into this in 2016 and I'm 32 years old

Loving these videos, Wyatt is a good presenter.

Now I know what to watch out for when I have a pick up lifted. Thanks.

Great video Guys!

Thanks for all the valuable info! 🙏

Wyatt, man, your boss is awesome 🙌

It would have been useful to discuss those aftermarket split boots that could be installed without taking the joint apart; are any of them any good? There was some car model back in the '80s (maybe a number of them) that had a lifetime warranty on the CV joints as long as the boot was not broken, but I have no idea if it covered joints with boots that had been replaced.

Love the vids Wyatt, keep em coming guys! Can you please do a video for the more grass roots motorsport competitor wanting to take their car from a road going car to a more competition based car. Going over what to start out with changing weather to go for harnesses first or a good pair of seats and that sort of thing in an list of what to do first to last, and than once getting on things like suspension and roll cages weather it might be a better idea to build our own suspension or to buy it from a company that already makes it or may it even be better to use the suspension out of a heavier car from that manufacturer if it happens to bolt in for rally use? Also as a lower budget competitor would it be better to pay someone to build a cage for my car or is it going to be worth building a cage at home with a bit of help from someone that may have done it before, and what are the types of things that are top priorities when building a rollcage. I'm currently building a Mercedes 190e for autocross competition in Australia (what you call rallycross in the states) which I plan to eventually do rally's with once I turn 18 and am trying to work out all of those little type things and choices of what I do when modifying the car. Also could you please do some videos on how to set cars up out in the field for different conditions like where would I would want to have a higher or lower spring rate with examples of the different terrain and conditions. Sorry about the paragraph but I'm trying to learn all I can about how to set up a car and your videos are the best and so far have been helping me heaps aswell as practicing the driving techniques that have been explained in some of you're older videos and I have been getting much quicker in competition! Thanks for the amazing videos and please don't stop making them!

This was fantastic!

Is there a video along these lines for RWD live-axle cars? Most of these parts are for wishbone or a-frame suspensions and are most commonly found on FWD/AWD cars. I can't imagine everything you'd find in a rally event has that heavy double wishbone. What would be good suggestions to keep a long driveshaft and differential in use?

I hav a question I install exedy performance clutch on my ford fiesta and my 5 gear counter shaft teeth worn out.Does this mean the the countershaft 5 gear cant handle the power of the clutch

super informative ... where can I order driveshaft - cv joint for evo 4 I build fiesta proto with evo 4 mechanical at my garage big thanks

I had a Mits Cordia GSR Turbo front shaft pop going up a long hill , a few clunks then it hit the rev limiter , ballbearings and shells everywhere lol...had to wait 3 days for one to arrive from another state!

I have also had fwd cv shafts also called half shafts and a transverse transmission a trans-axle

Do you guys have any good automotive books or online data loggers so we can track mileage, parts, buy date, how long it last, maintenance and so on for aftermarket and maintenance intervals?

Thank you for the video. I do some grip turn/trac racing with a lowered suspension. I noticed my rear cv joint boots leaked(rwd) and I know the boots can be replaced. Does it make more sense to have higher grade cv joints for cars with lowered suspension?

I need help on my 2012 Acura tl sh awd , i want to take the bmw 7 and use their setup on my car, and I can’t find any information on how to build a custom front or rear cv axle.

hi bro just asking which size the axle of b20b engine manual using ek 4

Thanks, very informative video

Suggestions for axle grease? Synthetic? Brand?

Thanks guys, very interested.

I've heard most rally cars run about 540 deg of steering. Is this because of the limited steering you guys mentioned or do some rally cars actually change the steering ratios as well for less turns to full lock?

great educational videos

Any problems with breaking other parts when using upgraded cv shafts? Like trans issues or diff issues?

Sooo good info keep up man

Do you ever notice any significant longevity gains when increasing power and decreasing the weight on a race car? I have a Mini Cooper S that I am looking to rally and swapped with a AWD 4g63. I am wondering if my stock Mitsubishi axles can handle more power in the Mini chassis since it's overall weight is lighter than the original donor car by about 400 lbs. Perhaps it's not significant enough of a change though

I just recently did a video. Where I replace my CV boots. It's a messy job. But having custom axles. It's definitely worth just replacing the booth.

the auto parts store i work at has split boots-- two halves that are glued together, it saves a lot of time and you need far less equipment to replace them. this plus the ghetto version the video mentions means there is NO excuse for naked cv joints.

Very interesting insights

Okay where can I buy me good front cv axle for my 3" left element 2003

935 racers found some kind of coal furnace cart grease that could handle 3x heat and pressure of what racers usually used. I would have to look at back issues of European Car to find manufacturer and product name for bullet proof CV grease.

Super informative as always, I didn't know a thing about drive shafts before this. At 4:51 ish, Tim starts talking about absorbing energy. In a rally car is it sometimes preferable to use stock clutches and mounts so that they can absorb more shock, rather than have solid parts everywhere?

this just confirmed that I need a new drive shaft

The inner joint can also wear out. I had one causing problems on a car I had - and it wore out because it was right above the silencer that overheated it over time.

Wyatt you are my favourite

How many miles and/or years should OEM CV axles last with basic on the road regular driving - Jeep Grand Cherokee 4.7L V8 and Toyota Camry 3.0L V6?

In Brazil, Ford only sells a complete driveshaft, not parts. And if you has a Focus MK2, most of the original parts are difficult to find.

If I gently lower a fwd car to keep the cv closer to level under normal driving conditions, is it feasible to dial in a little more steering angle? If so, how does one go about it?

how do you stop boots from getting cut open, seems like something that would happen a lot in rally.

soo if my half shaft is rated to withstand 500hp can my left and right cv joints be rated for 1000hp? :P or vice versa? I dont know what the hell im talking about

Great video! How often do you reckon I should *service* them joints?

How often do you see Subaru engines blow up? I know ringlands are a big issue for modified street cars, but do all the (close to stock) Subaru rally cars have the same issue? I would assume a racing driver knows how to take better care of their car than the average tuner, I'm not sure if that makes a difference though.

0:24 I was used to the term "half-shafts" for shafts that go from the differential to one wheel.

Does braking while in gear (or just engine-braking with throttle lift) wear out CV joints and/or the gearbox?

thank you! 👍

No mention of replacing a torn axle boot?

I race in Lemons, and I've replaced axles at least a half dozen times, and it has ALWAYS been the inner cv joint that failed. Never the axle or the outer joint.

looks like the upgraded CV joint is from the diesel fiesta

Another reason I insist on RD. Some excellent ideas there.

i had so much problems with this parts on my 350 hp cupra but i was faulty cause didn't put nought grease inside it was overheating :) learn by mistakes to put more then lessss

Ye, my ultimate question would be on normal cars, street drivinv, buf fast. is there any risk? Grip(not rally) sport driving with normal car(or basic sports car).

Wheel hop really likes to break half shafts.

excellent video!

spraying some silicon lube.. wether dry or wet type even some rubber conditioner on the outside of the CV boot from time to time will help it last longer..

Sooo, what's the difference between street and race car driveshafts?

Did anyone notice the heat marks on the outer from prob no greese

So im guessing theres no "Extra Angle" CV joints that we could purchase to allow for increased total angle? Allowing for more steering and more droop? Also, something ive wondered, is why drift cars will get massive angle but rally cars don't? cause i would assume axtra angle would be helpful in a rally as well. Is it just because a rally car has to put up with much more wheel vertical movement than a drift car and therefore the angles would be too great with extra steering angle?? thx

please hire me ! I am excellent at cleaning stuff !

brakes the spline section off of the ball socket then their is nothing holding the wheel hub and bearing together... rally use, get 800 miles out of a set so your throwing them in the trash every 300km?

Sorry, guys, but that video was about three times longer than it needed to be with so much repetition and rambling. Some points you missed were The importance of using a GOOD quality CV grease due to the very high loadings on the components. A basic precaution that can be used with driveshfts - when they are new draw a line along their length - sometimes a shft will fail catastrophically without warning but normally the shaft will twist first and the line will show this, a replacement would be a good idea with a 1/8 twist and certainly by the time it got to a 1/4, if it got that far. Shot peening will extend their service life, but may not be financially viable. Some things to watch out for when cleaning the joints, if they are servicable, is if any discolouration is present (indicates hot running), any metallic particles (can indicate breaking up of the cage or other part) or any markings on the balls. When purchased, the joints should be stripped, cleaned (not unknown for manufacturing debris to be left behind), inspected and, if budget allows, crack tested. Dry assemble the joint and check for tight points and, if they are present, polish them out with some W&D as they will affect the steering feel, add drag, and could cause hot spots - some teams will even replace the supplied balls with slightly undersized ones to minimise the joint friction. Many/most vehicles have the steering stop between the stub axle/bearing carrier and wishbone or elsewhere, if so, it is much better to build that up than build a stop into the rack - especially if that is solidly mounted - as otherwise and hard impacts will be fed directly into the rack on lock, increasing the probability of a breakage there (a flexible material will help cushion this, though).

When under steer do not give more steer give it less and brake put wait on the weels and get your traction back

#ProtectYourShaft

Ive snapped an axel before, and the story isnt that exciting. I live in NH too, was on an offramp in the snow, main road had been plowed already, spun the wheels a little at the light on the offramp, when the tire hit the pavement where it had been plowed better, the shaft kept spinning the the tire didnt. My mechanic said hed never seen it before.

Wish you guys would have done some close ups. But cool video nonetheless.

I'd like to see a real Bendix CV joint...

RWD for the win.... Mad angle :)

just a little nugget of useless info, in Bahasa 'Tim' means Team, so Tim O'Neil means "team o'neil" to someone who speaks Bahasa :)

Well I would appreciate greater steering angle in modern cars, it amazes me how it is easier to parallel park Volvo 940 (aircraftcarrier) in busy city or at stuffed yard than tiny C30. Every car is AWD (which actually doesn't turn rear wheels) nowdays anyways so it would be much of a journey to make RWD cars again, you get better economy, greater steering angles and more fun for the skilled (more death to stupid and collateral if everybody goes initial D).

I broke the axle on my mercedes 300 while taking off from a green light...

3:50 duct tape death match ~ initial d's night kids. Kenji? When repairing cv's, have plenty of brake cleaner or spray cans of degreaser on hand. Rags too. Ughh

52100 is ball bearing steel😁

Uhh, i really don't think propeller shaft is one of them, half shafts would be one of them though.

Interesting. I wonder if anyone is working on AI that can predict part failure?

Can you all work on my car for your class project. I be most grateful.

So where are the solutions ????? You put in a steering angle limiter, (which is unacceptable for a variety of reasons), but you don't appear to be upgrading anything. Do you really use stock parts on a race car ??

Torque snaps shafts, not power

All these problems will be solved if you have a RWD.

Wyatt seems to have ADHD.

no wonder front wheel drive cars drive so bad

Ford Fiesta, High horse power. Pick one, cuz we all know you cant have both.