Front Driveshaft Question

[Kilian]

Is there a grease seal or cap that's used on the 4WD front driveshaft to keep dirt out of the spline area where the two parts fit together and slide?

There's a cap that's threaded on the short end...does that retain a seal?

Thanks for the help!

 

[SquareRoot]

It would have to be shaped like a starfish to be effective I imagine.