Does a new yoke come balanced?

Are yokes balanced from the factory? I took one off to install a carrier bearing on my T800 and now have vibration from 35 MPH to 47ish MPH. The vibes don't show up when the dump truck is loaded.
I didn't know to mark the yoke but did line it up with the front one when reinstalling it.

I've wondered if it could possibly be 180 degrees out and causing the vibration?

I thought I'd try the harder urathane orange carrier bearing because I'm tired of replacing the softer ones every 1.5 years.

If its not the yoke I'm thinking the softer carrier bearings have been masking the vibration that's causing premature carrier bearing failures.

 

Ok I might have to look into that bearing.

I found out last night the shaft definitely has some wobble to it. With some vice grips I clamped a stiff bracket to the carrier frame about 1/16 " off the drive shaft and took it a test spin more like 10 to get the mark I needed. The 1st metal I tried was to springy and left a mark all the way around.

I did finally get a heavy side marked about 1/3 of the way around the drive shaft that also suggests one side of that yoke could be heavy. Its also the side where a 3/4 hole was drilled into the yoke to help balance it.

So with a heavy side established I made center mark and used 2 hose clamps on the opposite side of the heavy side and spread them out in opposite directions back towards the heavy side.

If you picture heavy side at top the hose clamp screws are moved almost to 3 and 9 Oclock position and this has softened the vibes up considerably. I still have some tweaking to do.
I plan to turn the yoke over and try that before taking the shafts to the balancing shop.

When I 1st changed the carrier I also discovered a bad bearing at the back of the 8LL transmission so its been out and completely rebuilt and that came with an $8802.83 bill. And right now I don't have a dime to take this thing to the shaft balancer.

 

Thanks for the comments everyone.

I finally got the chance to flip the yoke 180 degrees a couple hours ago just to see if my assumption was correct, and all the vibes are gone.
Its run out is smooth as glass like it should be.

Its taken me this long because I could not get that 1-5/8 nut loose with the tools I took it off to change the carrier bearing originally - 3/4 ratchet and a 42 inch cheater bar.
I think red loctite and being able to put a downward foot on the socket with with a pull bar 4 good times must have put about 400 ft lbs of torque on it.
I couldn't pull up on it and break it loose to save my life.
I might could have but I don't think my 3/4 ratchet would have stood it.
Or maybe my wrists would have snapped?

I have since learned that drive shafts are balanced with all of the pieces together even with a temporary carrier bearing in place, so it can most definitely matter if the yoke is put on 180 degrees from the position it was originally balanced in.

So mark the yoke before you take it off for any reason.

I had ordered a 1" to 3/4" adapter to run that 3/4 drive 1-5/8" socket with our 1" tire gun. And I was surprised it took that thing about 20 seconds to get that nut moving. I hated using a 12 point socket with all that power but its all I had.

The tire gun is definitely not user friendly under the truck but it did the job.
The urathane bearing seems to be a non issue.
I'm so glad to have those vibes gone. I just hope it hasn't damaged anything else.

So yea mark the yoke. I should have known this stuff man! This has cost me much grief and aggravation. Anything that has been precision balanced has to go back like it was.