Originally Posted by
350RRC
Hi, Some recent experience of mine may help.
74 RRC with a 2" spring lift. Slotted the swivels 10 years ago to improve steering at speed, great mod.
Stock driveshaft, smooth as silk.
Recently swapped front whole diff out for one with maxi everything in it, along with radius arms. The new radius arms had caster correction bushes.
First thing I noticed was that the prop shaft was making contact with the crossmember. That never happened before. Put a slim tubular one in, all ok.
With the caster correction bushes the prop shaft lines up pretty well straight on with the front diff snout.
All good you might think, but no. The prop shaft angle at the front of the TC is noticeably increased, causing probs with the old crossmember.
Anyway, took it for a drive and felt the new vibes, not good. The prop shaft was in phase so I put it one spline out. Bit of an improvement, but not as good as it was with slotted swivels.
All I can say is with a 2"lift, IME slotted swivels will have the snout of the front diff pointing up about as much as the prop shaft points down from the front of the TC. i.e. roughly equal angles and just maybe less vibes.
cheers, DL