To Double Carden or NOT ? (1 Viewer)

[cc93cruiser]

Well, I never that it would come to this, but my cruiser has some slight vibes on the highway between 60-70mph coming from the front driveshaft. I was always the lucky one that got away with putting on Heavies with no vibes, then J's and now currently Slee 4" springs (all with minimal caster correction, ome/slee bushings).. I guess my cruiser was one of the best off of the assembly line with a tad more positive caster than its brothers and sisters.
My perfect, and harmonious world with no vibes on Slee 4" springs came crashing down with my smart idea to fix something that wasen't broken- install new u joints and dissassemble and assemble the front driveshaft with new grease (grease up the splines the correct way). I guess I assembled the driveshaft wrong or something, I mean it must have been by a spline or two, because I usually am very observant about my work, and don't make mistakes, but I have this grr/vibe at the posted speed after I took the driveshaft apart.. As mentioned before it was working perfectly before I messed with it..
All this brings up the question I have.. Should I take my FR DS to a DS shop and have them look at the shaft and see if they can put it in perfect order/balance etc..? Or should I invest my money in a Slee double carden shaft knowing that I have minimal caster correction (with 4"springs) and my pinion angle might not be suffecient enough for the double carden?

 

[BB]

If it were me, I'd take a second look at the DS and make sure I put it/them back together right. Check the service manual - I think 80 series driveshafts go together out-of-phase (correct term???). A driveshaft shop could double check and balance them as well. Since this problem happened right after your work, I'm pretty sure you could isolate and solve the problem without a new Slee driveshaft and save some $$.

Brian

 

[cc93cruiser]

Brian, thanks for the suggestions.. I have my FSM and I have seen the pics in it, but I can't figure out what in the hell in phase/out phase, whatever phase crap means, or looking at.. This coming from someone who has done a couple successfull headgasket R&R's and countless front and rear diff R&R's etc..(not claiming to be an expert, but am mechnically inlined) Sometimes the simplest things stump me, my downfall... Can someone please elaborate?

 

[adamsclarke]

Phase is just the orientation of the Ujoints/yokes. If the they are parallel to eachother, they are in phase. If they are at 90* to each other they are out of phase. Unless you pulled the DS apart at the slip joint, it's fine.
I'm running OME 5" comp coils with a stock front shaft. A little vibe, but works fine for me.

 

[cc93cruiser]

Phase is just the orientation of the Ujoints/yokes. If the they are parallel to eachother, they are in phase. If they are at 90* to each other they are out of phase. Unless you pulled the DS apart at the slip joint, it's fine.
I'm running OME 5" comp coils with a stock front shaft. A little vibe, but works fine for me.

What are you running for caster correction?

 

[Tools R Us]

Mine runs noticeably smoother in phase, try it both ways.

 

[adamsclarke]

It's running the OME yellow bushings and drop brackets for caster. Works fine for me.