Two-piece drive shaft phasing

[gcburdic]

Originally Posted by LONGHAIR

Well, from the looks of it, gcburdic, yours is off (out of phase) but that appears to be in the welded section. I suppose that since it is the section that is held by the carrier bearing, it "theoretically" doesn't have an "opposing" joint on the other end. The important part of the phasing would be between the middle and rear joint. Those two would need to be aligned.

The joints are supposed to be "in-line". Say you lay your drive shaft on the garage floor, standing on the "flat" of the yoke. Then all of the joints should stand the same way. Now, I know that your carrier bearing is in the way of this, but you get the point? When they are aligned like this, each joint is doing the same thing, meaning compensating for the angle of the drive shaft, at the same time.

Many times there is a "dead" spline that will only let it slip together one-way...but not always. All of the others I have seen have had an odd number of splines. This makes it so that there is really no way for it to be assembled 180 degrees out of rotation. Even if this wouldn't effect the phasing, it could effect the balance of the shaft as a whole.

Well crap....I guess I'll run it over to them and have them take another looky....I really appreciate you input Longhair....I'd hate to be rollin' and have it go ca-put!!!....Thanks again! Geoff

CoachMeason...PM sent

[Green Machine]

Should be like this - each "long" piece should have the ears lined up -



yoke hanger Rear


==[0==========0]============[0

[WorkinLonghorn]

Hmmm. OK I think I have it now,thanks everyone.
BTW,For what it's worth the Haynes manual says for a 4WD (mine is 2WD)rear shaft you line them up and then rotate the rear section 4 splines counter clockwise.

[gcburdic]

Hey Guys,

I wanted to bring this back to the top, and don't mean to hi-jack this thread, but I think it applies?!?!?
I stopped by the shop that balanced the driveshaft and installed the carrier bearing....he looked at it again and said that he knew it was 1/4 turn out, but said that is how some of them came from the factory?!?!....
I really didn't notice any vibrations while driving it home, but I can't say there isn't one.....ugh....should I take it to another shop and get it in phase, or should it be okay??

Thanks for any input!!!

[eightbanger]

Geoff, just for peace of mind take it to another D/S shop and let them give you a second opinion.....

[brad_man_72]

some 1st gen camaros were 15* out of phase. i cant imagine a ds shop would leave the shaft out of phase when they were going to ballance anyways. their are a ton of people that think they know how to build a driveline, most of them dont have a clue.
ive seen mechanics SLIDE a driveshaft apart get the yokes out of phase with a blind spline then use a BFH to BEAT the driveshaft back together, ruining several expensive pieces of the ds.