Driveshaft-Differential problem

[The Hamsterball]

Oh yeah....

Can anybody verify if it is a BAD THING to use an S13 non-abs driveshaft for the S14 VLSD from an ABS equipped car.

The driveshaft of the S14 that the VLSD initally was on had a driveshaft that is .75'' shorter (as said on ka24development.com)

I had no problems getting the shaft to fit on the diff, but am wondering if it is a bad idea or if it puts too much stress since it's longer and has to kind of squeeze itself in to line up to the input shaft of the VLSD.
(I remember reading something about this, and think I read something that made my mouth open.. Something about adding extra pressure/stress to the inners of the VLSD)

I wouldn't have worried about this if I didn't have a new rumble noise coming from the rear occasionally on DECELERATION.
It comes very rarely.
That scares me lol.



But other than that, thanks for the suggestions.More importantly, Does anybody know about 240SX Rear U-joints, the ones that connect to the diffential shaft flange? Do you have to grease them or anything? Or do they not have grease?? I am kind of confused in this matter, and am wondering if there is a way to servicve them or just buy a new rear driveshaft section to fix the problem.