Carrier bearing good or bad?

Thnak for your help, man! As soon as I drive the truck, I'll test it out! Forgive my ignorance, but what difference does it make whether you accelerate or not while going 60 mph? Isn't this part supposed to be in constant motion?

 

OP,
I just ran out and recorded video of my CB while trying to emulate your movements. I am an '08 PreRunner TRD Offroad with around 129k miles on the original CB. I'll never claim to be strong, but the video is of me trying to move the DS as much as I could.

https://youtu.be/U4FuDOAtG1w?si=aRwOJ7GFzsNPEKsk

 

Awesome! Thanks for everything, bro! And for the video. That was great! I don't think mine is too far off from yours. I don't know what to think now! Are you sure you don't have any symptoms that it's bad too? My truck was lifted 6 inches for years. In my ignorance, I think that maybe the incorrect angle of the drive shaft could have accelerated the deterioration of the CB. I found a video on YouTube with a before and after of the repair. I tried to contact that guy, but it's an old video from a year ago. I don't think he'll respond.
https://www.youtube.com/watch?v=vsUXkni4rlk&list=PLsKE-dl8SpnbQTTD2EvEIxuSVzc0Px028&index=14

 

I don't drive my truck very often these days. Maybe 1-2x every two weeks. I'll reread your symptoms and see if I have anything similar. I did have bad vibration in the past and I was tearing my hair out trying to resolve it. Coincidentally, when I upgrade wheels/tires earlier this year, it fixed a LOT of my vibes....so I deducted that it had to be wheel/tire related.

 

Yes, the same thing happens to me! I don't drive it much either. I've changed tires several times, and when I've had balance problems, it's usually between 40 and 50 mph. Now, between those speeds, I don't have any problems, but at 60, this strange vibration starts that is reflected a little in the steering wheel. It doesn't help that the roads here in TX are crap. I used to live in FL, and they were a little more decent. I think the bumpy road plus the vibration intensify the problem.

 

OP, how many miles on the truck? I had a stock 2nd gen and had to replace mine at around 90k miles. It seemed about like yours. For 70 bucks it seems like it's worth a try.

 

The truck currently has only 78,000 miles, but I think that perhaps being lifted for 8 years (now leveled only) and the CB being at the wrong angle could have accelerated its deterioration... maybe?
What symptoms did your truck have when you replaced the CB?

 

Yes, I'm sure a 6 inch lift would put a bit more strain on it. Mine was sagging a bit, looks like yours is as well. It's been a while, but from what I recall, I had vibrations from about 45 up to 60.

There's a staked nut on the driveshaft that I had to get from Toyota, but it's only a couple of bucks. Grab 2. I think some people re-use them, but you're not supposed to. I used an SKF from RockAuto, and it looks like it now comes with the nut that you need, didn't at the time. But they want too much for it -- if you can get the Spicer from Amazon for $70, I'd go that route.

 

Thanks for the tip, bro! I really appreciate it! Yes, the Amazon spicer looks like a good option, I already have it in my shopping cart. And I think I'm also going to change that u-joint since it practically needs to be removed. The others look pretty solid. Impossible to move them by hand. I'll try to find the part number for the nut to go to insurance. These people in the parts department at the dealer are complete jerks. Is that the nut that goes to 130 lbs of torque?

 

If it’s pushing the vehicle, ie under load, certain characteristics will be present, meanwhile if you’re coasting, it’s just spinning with no load on it. In the video I linked the driveshaft with the bad u joint would vibrate while it was under load and not vibrate while it was coasting (no power from the pedal being pushed).

 

Yes, that's the nut. You are supposed to stake it down after torqueing. You kinda need access to a vice for this job to hold the driveshaft when you remove and re-install. I'm sure there are some crafty workarounds, though. With the amount of lift you were running, replacing that u-joint is not a bad idea, but if there is no play I would personally leave it alone. If it has a zerk, fill 'er up.

 

had a worn CB. Got IEDLS poly. That tore. After that, MitchMade billet.

I don't see what CB has to do with a steering wheel shake.
Propshaft connects to back of trans. Outputs rotation to rear axle.

Steering is not connected to that.

 

Watch the Royalty Auto video with the blown out u joint. The whole truck is shaking but you’re going to get more vibration through hard mounted parts like the steering shaft if the drivetrain is vibrating rather than a bushing mounted sheet metal body and soft materials mounted to it.

 

I was going to say something similar. I always feel vibes in the steering to some degree. When I was working out my driveshaft angles after my lift, I could feel it just a little in my butt, but much more in the steering even though it had nothing to do with the front end.

Either way, with a center bearing where the rubber is letting the shaft drop noticeably, I'd replace it. It's a cheap and easy job to do.

A friend had an ML 500 and was driving up to visit, and his disintegrated when he was about 100 miles away. It's pretty much undriveable when they completely fail, unless you can pull the rear driveshaft and run it in front wheel drive.