changed the ujoints....vibration worse

[saint60]

i changed the rear ujoints in my 60 today and then drove it home on the highway. i don't think the original ujoints had ever been changed and were pretty bad. anyway-while replacing the ujoints i took out the short end of the driveshaft and shot some grease in there. i don't know if i put it in the exactly right spot. would that screw up the balance on the driveline? the cruiser doesn't really vibrate, but makes a very loud annoying sound. kind of like when you drive on the highway with a rear window down and it makes your ears hurt. wtf could that be? if it's the driveline i can go have that rebalanced tomorrow no problem. should i?

 

[gulp3000]

Had the same problem recently. I was told the front and rear joints do need to be positioned correctly (I believe 90 degrees from one another) but when I took mine out to fix that, I discovered a hairline crack in one of the new joints.

 

[Mace]

If the U joints are out of phase you will have vibrations.

 

[saint60]

If the U joints are out of phase you will have vibrations.

what do you mean by "out of phase"?

 

[roscoFJ73]

what do you mean by "out of phase"?

Basically it means out of alignment. If you pull the shafts apart they should go back in the same splines. If you have moved them around by even one spline the front and rear are out of phase.

Have a look at your front driveshaft.

You should mark mark them before you pull them out

 

[saint60]

dayum-i didn't do that. so how do i get them back in phase? do i need to have the driveline re-balanced?

 

[kling-on]

look at it the ears should be 90* of each other

 

[lovetoski]

dayum-i didn't do that. so how do i get them back in phase? do i need to have the driveline re-balanced?

There's a pic in the FSM of how the driveline goes back together. Rebalencing is a good idea though too.

 

[saint60]

There's a pic in the FSM of how the driveline goes back together. Rebalencing is a good idea though too.

I don't have an FSM. Would it be possible for anybody to scan the page and email it to me or just to explain it? my email is saint6t@yahoo.com
thanks.

 

[jwest]

Assuming of course that the ujoint was the cause of vibration, that it was installed correctly and finally, that the driveline was in phase to begin with...

It's not a question of how it goes back together. It's a question of re-installing in exactly the same orientation, flange to flange and shaft to yoke.

This is the reason for match marking.

It's difficult at this point, but see if there are any tell tale indications, or patterns that might clue you into how exactly each piece fit.

Otherwise, you're looking at rebalancing.

.

 

[kling-on]

to start of with look at the solid tabs on the shaft that the u-joints mount in to are the same or 90 deg of eacj other if there 45 or so they will shake cause there out of "PHASE"

 

[jwest]

These should help you some with orientation or phase.
Note the symmetrical consistency on both ends.

The last two illustrate match marking.

 

[saint60]

that does help a lot jwest. i'm going to pull it tonight and check it all out. i don't know that the ujoints were the cause of the vibration in the first place, but it seemed to get worse after installing the new ujoints. i called a driveline shop and they quoted me $35 for a rebalance. i may end up taking that route and chalking this one up as a "lesson learned".

 

[ajfriz]

It also helps if you aren't a dumbass.

 

[lovetoski]

i called a driveline shop and they quoted me $35 for a rebalance. .

That's a fair price....and many of us...most of us maybe, learn by first screwing up. It's part of the fun of learning...