SYE or custom driveshaft?

[2TALL1]

Wow I would have never guessed that.
I used to have an old ford with a divorced transfer case and had to time the drive lines every time after you went 4wheelin. The little input driveline had to line up with the rear driveline. Otherwise you had bad vibrations.
So are you just going to keep rotating it until you find the sweet spot?
I’m actually blown away I’ve never heard of this being an issue.
I’ve pulled mine and put new u joints in it and didn’t think twice about the clocking of it.

 

[u2slow]

Doesnt the tcase and driveshaft (yoke) have a master spline? (i forget) ...so theres only one indexing that it fits together?

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[mercdudecbr600]

Wow I would have never guessed that.
I used to have an old ford with a divorced transfer case and had to time the drive lines every time after you went 4wheelin. The little input driveline had to line up with the rear driveline. Otherwise you had bad vibrations.
So are you just going to keep rotating it until you find the sweet spot?
I’m actually blown away I’ve never heard of this being an issue.
I’ve pulled mine and put new u joints in it and didn’t think twice about the clocking of it.

What’s interesting is that almost every mechanical instruction states to mark dl position before removing. So I infer that clocking is a thing to the more initiated.

I also didnt think it mattered - and maybe it only does because my tc output shaft and/or dl is slightly bent and getting that assembly just right is what helps the vibs. This has been quite a journey!

 

[mercdudecbr600]

Doesnt the tcase and driveshaft (yoke) have a master spline? (i forget) ...so theres only one indexing that it fits together?

You must be registered for see images attach

No it doesn’t. It’s the opposite, it has a blank and the output shaft has no master spline

 

[mercdudecbr600]

story continues. After fussing and fussing (indexing), I did find a position that allowed me to get to 75mph with minimal but predictable vibration. I tried 8-10 positions. But despite my intuition I never found a spot that allowed smooth driving. I felt like I exhausted the rear driveshaft and pulled the front driveshaft. Smooth driving to 85mph.

I’ve replaced 3x’s already with a “balanced” lifetime unit, so I’m starting to suspect that I’ll have to index the front driveline. To be continued…