Shaft Drive rebuilt, recomendation

[Merzuga]

Hi, I need to replace the shaft Drive and I am thinking un a rebuilt one. Has anyone experience?

Schermafbeelding2021-12-27om16.37.40_1024x1024@2x.png (47.56 kB . 768x523 - viewed 256 times)

[Past-my-Prime]

I don't know for sure but the splines on those look pretty good to me!

There's a post called "Spline replacement stubs kparts. . ." that linked to here:

https://kpartsholland.com/products/replacement-spline-for-drive-shaft-monolever-only-20-spline?variant=38052077732018

where you can also find u-joints.

But you either need to be a good welder, or know one!

One thing to keep in mind is that the corresponding final drive teeth may also be worn (if less so) and that would limit the expected lifespan of the new splines on the driveshaft. So replacing either the whole final drive or just the piece that the driveshaft slides on may be required?

[Merzuga]

Thanks, Past-my-Prime. I want to buy just the spline piece. There are several professional mechanic that can welde the spline piece yo my old SD. They are reparing transmision for truck, car and any kind of engine.
Muy concern IS about FD. I have read that sometimes new DS (or SD) can destroy the old FD.

[The Mighty Gryphon]

I suspect that the factory made the drive shaft splines out of a softer steel to let them take the wear to protect the splines of the final drive.  If the repaired splines on the drive shaft are too hard they will indeed wear the final drive splines.  It's also possible that the act of welding the replacement splines will anneal them, making the steel a bit softer.

My feeling is that as long as there is a good fit to minimize the impact forces between the the splines, annual cleaning and lubing of the final drive connection should provide a long service life.

[Merzuga]

I suspect that the factory made the drive shaft splines out of a softer steel to let them take the wear to protect the splines of the final drive.  If the repaired splines on the drive shaft are too hard they will indeed wear the final drive splines.  It's also possible that the act of welding the replacement splines will anneal them, making the steel a bit softer.

My feeling is that as long as there is a good fit to minimize the impact forces between the the splines, annual cleaning and lubing of the final drive connection should provide a long service life.

Thank you for reply.
I have written to producer. I Will wait for their reply but They Will say that everything IS ok with the new splines, I guess.