Does Selec-Trac use CVJs?

[dcmdon]

I'm figuring out the options I want on my Gladiator Mojave. Having owned an AWD car I'm very interested in having the front wheels driving when I'm on the street. Its huge if you are accelerating away from a stop in the wet. Especially while turning.

However I also intend to use this on moderate trails in the northeast, It won't be hard 4 wheeling, but there are a lot of sticks and branches that could pose a threat to CVJ boots.

If they all use CVJs, then I don't really have a choice.
If they all use U joints on the front axels then I don't have a choice.

But if the part time system uses U joints on the outside front axel and the Selec-Trac full time 4wd system uses CVJs, then I have a choice to make.

Any info on if the Selec-Trac on a Mojave uses CVJs is appreciated.

Thanks,

Don

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[CerOf]

Part time gets u-joints.
Selectrac gets cv’s.

I never had an issue with the CV’s in my old ZJ grand Cherokee nor the WJ.

 

[dcmdon]

thanks. I wonder why they do that. Any thoughts?

 

[ACAD_Cowboy]

So select trac doenst use a traditional front axle? I was under the impression the difference was in the transfer case via a viscous link or other such means to shed wind up.

Fwiw, cv are way better on road and can be built beefy. IRS german sporting machines have that nailed down pretty well. The slight but constant ramping up and down of joint speed can also be a drip drop leak of fuel economy.

I demand pictures!

 

[CerOf]

So select trac doenst use a traditional front axle? I was under the impression the difference was in the transfer case via a viscous link or other such means to shed wind up.

Fwiw, cv are way better on road and can be built beefy. IRS german sporting machines have that nailed down pretty well. The slight but constant ramping up and down of joint speed can also be a drip drop leak of fuel economy.

I demand pictures!

The front axle is just like any other. Only difference is the axle shafts themselves are cv joints where as the part time 4wd systems have u-jointed axle shafts.

CV joints have a wider range of smooth operation (i.e. wheels turned all the way)when power is applied. Thus, they are good for AWD systems.

u-joints aren’t as smooth when you turn at a sharp angle under power.

CV joints can be every bit as strong as a u-joint. But, if the boot tears, you need to get it fixed fairly soon.

 

[dcmdon]

That's right. I forgot that the deflection of a turning wheel is FAR FAR greater than the angular deflection of a drive shaft that moves with the suspension.

U joints lose a lot of strength when turned over hard. Much more than CVJs.

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