New CV driveline now what?

heep70 · Nov 20, 2006

Ok, so I went and got a rear CV driveline built to solve the noise issue my Toy was having with the junk non-CV stock driveline.

So now as far as I can tell the noise is gone, but it vibrates while going down the road. Here is what I got.

1980 short bed w/ a 6" lift and dual cases.
The drive line from flange to flange is 43" long.
The angle of the rear pinion is pointing up 15*.
The drive line angle is sitting real close to 16*.
The rear pinion is 1* to 1.5* off from being straight with the rear driveline.

What could be the cause of the vibration?

4xjunkie · Nov 20, 2006

Is the driveline in phase??

Are the two yokes lined up with each other.

heep70 · Nov 20, 2006

4xjunkie said:
Is the driveline in phase??

Are the two yokes lined up with each other.

YES, the driveline was built by Highangle drivelines.

Roccrawler · Nov 20, 2006

4xjunkie said:
Is the driveline in phase??

Are the two yokes lined up with each other.

How is a CV driveline not phased? cv joints cancel out each other and the joint on the axle doesnt matter?

4xjunkie · Nov 21, 2006

roccrawler said:
How is a CV driveline not phased? cv joints cancel out each other and the joint on the axle doesnt matter?

So are you saying that I can take the yoke off turn it 90* and it won't be a problem?????

heep70 · Nov 21, 2006

This ain't helping me :flipoff:

crash2 · Nov 21, 2006

roccrawler said:
How is a CV driveline not phased? cv joints cancel out each other and the joint on the axle doesnt matter?

The CV portion is but not the other side of the shaft--the yokes have to be in phase with the CV....

4xjunkie · Nov 21, 2006

crash said:
The CV portion is but not the other side of the shaft--the yokes have to be in phase with the CV....

HA. I thought so.

Totalled · Nov 21, 2006

CV at t-case, singe joint at the pinion? Pinion needs to point inline with the shaft on a CV setup.

EDIT. Read yer post again.. yeah, 1 degree down should be right since it will point up more under acceleration.

Is the CV angle maxed out at ride height?

Roccrawler · Nov 21, 2006

crash said:
The CV portion is but not the other side of the shaft--the yokes have to be in phase with the CV....

Just to double check, According to Driveline NW . THe cv will cancel out it self at the transfercase side and the rearend should be pointing inline with driveline. so that being said it wouldnt matter what position the yolk at the axle side was... except if you driveline was balanced then it would throw it off.

Interesting

crash2 · Nov 21, 2006

roccrawler said:
Just to double check, According to Driveline NW . THe cv will cancel out it self at the transfercase side and the rearend should be pointing inline with driveline. so that being said it wouldnt matter what position the yolk at the axle side was... except if you driveline was balanced then it would throw it off.

Interesting

yES that is true but what happens when the housing articulates

Wanna hear an funny noise but a shaft outa phase and it makes really a really cool pissed off rattle noise :redneck: And what happens when a rig that gets lets say 3-4 degrees of axle wrap and the yoke is outa phase----really pissed rattle noise :;

Roccrawler · Nov 21, 2006

crash said:
yES that is true but what happens when the housing articulates Wanna hear an funny noise but a shaft outa phase and it makes really a really cool pissed off rattle noise :redneck: And what happens when a rig that gets lets say 3-4 degrees of axle wrap and the yoke is outa phase----really pissed rattle noise :;

It doesnt matter because the axle side ujoint isnt phased to anything,, the front cv cancels out eachother.. so it doesnt matter what you line it up with its always out of phase

crash2 · Nov 21, 2006

roccrawler said:
It doesnt matter because the axle side ujoint isnt phased to anything,, the front cv cancels out eachother.. so it doesnt matter what you line it up with its always out of phase

Just telling you what I have learned from experience and not reading :;

Roccrawler · Nov 21, 2006

crash said:
Just telling you what I have learned from experience and not reading :;

For the record I would line it up.. but, ..........:kissmyass:

heep70 · Nov 21, 2006

Totalled said:
Is the CV angle maxed out at ride height?

Don't know? Explian please.

The noise that Crash has mentioned is probably what I was getting with the non-CV shaft I had before. It was almost to loud to listin to.

I don't have that noise as far as I can tell now. But instead it vibrates. I put it all together with out setting the pinion angle then took it out for a spin. It vibrated really BAD. Then I measured it and put in 6* shims to get the pinion lifted. It help alot, but still vibrates a small amount. Should I alighn the pinion and D-shaft dead nuts on with each other?

Roccrawler · Nov 21, 2006

You might watch to see when its doing it, you may be gettin a axle wrap situation when taking off or braking. and the pinion is not lineing up very well, sometimes you can help it by twisting it above straight or below at a neutral position

heep70 · Nov 21, 2006

Yes, I have thought about the axle wrap issue. But then what has every lifted toyota owner done to fix it. No what I am saying. Ther should be all kinds of folks chimming in with the one and only fix. Thats what I am looking for. I am almost possitive it is the alighnment between the pinion end and the driveline with a CV driveline.

I Read this tech article.

http://www.4crawler.com/4x4/CheapTricks/Driveline-101.shtml#Double-Cardan-Measurements

Good article except (maybe its me) it wasn't real clear on what is the better way to line up a CV driveline. It meantioned that it is OK to have 1* differance between the pinion and driveline (pinion lower). It also said to static line up the pinion with the driveline. Then finally it said to have them lined up with each other at an operating angle.

I realize that there is one answer for every lifted rig, but what is better?

Also, how does one figure out what the operating angle of pinion is?

Not trying to make a mountain out of a mole hill, just trying to not waste alot of cash and time on this fix. Thanks

Totalled · Nov 22, 2006

heep70 said:
Don't know? Explian please.
If you unbolted the D-shaft at the pinion, would it droop down any more, or would the CV run out of angular travel and bind up?

CrustyJeep · Nov 22, 2006

roccrawler said:
It doesnt matter because the axle side ujoint isnt phased to anything,, the front cv cancels out eachother.. so it doesnt matter what you line it up with its always out of phase

No no no :flipoff:

The CV cancels itself out (it's just a really short driveline). That leaves the axle end joint with nothing to phase against. Therefore, it *must be straight*. It matters.

If it's not straight, it will be out of phase and will have nothing to cancel it out, thus vibrations.

heep70 · Nov 22, 2006

CrustyJeep said:
No no no :flipoff:

The CV cancels itself out (it's just a really short driveline). That leaves the axle end joint with nothing to phase against. Therefore, it *must be straight*. It matters.

If it's not straight, it will be out of phase and will have nothing to cancel it out, thus vibrations.

OK, so do I line it up striaght while the truck is stationary or try to figure out where it would be lined up under working conditions?

Yes, I f I unbolt it it has more then plenty of movement. The CV was clearenced ground.