Vibration when going 35 -45 mph

So I have a big question that I’ve been stuck with for the past month. A month ago I notice a very slight vibration when accelerating to 25 mph but then it went away. It didn’t really bother me, because it was very settle and most people didn’t notice it. Then it came to two weeks ago I noticed a weird squeak/ grinding noise at the right rear of my truck it Sounded like dust cover rubbing agents my disk break but there is drum breaks at the back. I check everything in mind and nothing.it wasn’t that bad so I let it be. Then came this week and the vibration got so much worse I automatically thought it was going to be my carrier bearing and then I checked under my truck and then it had to be replaced so next morning I went to AutoZone and got the doormen carrier bearing and then replacing it this morning. Thinking it would solve the problem. It did not. The vibration is still there still the same strength as before replacing the carrier bearing now I’m stuck and I don’t know what to do or what it is if anybody has any answers, please help me.

 

My truck does have a lift kit on it with a axle drop kit so needle bearings shouldn’t be a problem I’ve also checked for play on the CV axle and got nothing……..
I will attach a vid soon so it’s more clear on what I’m talking about

 

bad tires? Belt separation, balance.
U-joints? definitely check the yoke connection.

 

Wouldn’t be the tires I just got a new Mickey Thompson last month they are balance I know for sure it wouldn’t be it. Also what do you mean by belt separation? And also yoke connection what should I look for

 

steel belts or crown ply in the tire can separate. Had it happen to an old thunderbird.
try rotating the tires
I would also check all them tie rod ends and bushings everywhere.
I mean there are so many places to check for speed vibrations. Lucky me I just had the normal lifted truck vibrations around 1.5k to 2.5k RPM in second (probably the same you had* at 25 mph) so I changed my pinion angle. I don't think this is what you are experiencing but, could be the cause so yoke and u-joints I would check. slippage and or worn down from rubbing, ovaling. I too would have checked the center bearing as you did.
Did you check the wheel bearings? You can do it as your rotating tires. Wished I did on that T-bird as I lost my driver side hub you know the one w/ belt separation problem I had earlier. One might have caused the other but was it the chicken or the egg 1st?

 

I totally forgot about wheel bearings!! I replaced my whole steering knuckle on the right side from an accident that happened in the beginning of the year and I had a fear I would eventually replace that part because i got it off of an old sequoia at a junk yard. But u joints I did check already for play and nothing I also greased up everything down there too. Later today I’ll check play on the wheel bearing and see what’s up I hope it’s not that those are a pain to replace

 

I had an issue with the bearing in the driveshaft causing vibration between 25-35 mph. Could be that?

 

That'd be the carrier bearing which OP said he just replaced this morning. So shouldn't be an issue. Seems more likely to be a wheel bearing.

OP, I'd also visually inspect the rear drums when you rotate the tires. Since you mentioned a rear end noise being the first symptom you noticed. See if the drums rotate freely and have a fairly symmetrical drag from the shoes. Perhaps you've got an out of round drum causing the vibration.

 

Check the inside of the drum for uneven wear? Is that what you mean by checking the drum ?

 

U-Joints @ driveshaft...

 

I already checked that brother, joints are as solid as can be next thing I’ll have to check is the carrier bearing

 

When I had my carrier bearing replaced the shop used an O’Reilly’s special. Within 2 weeks it started squeaking again. After that I bought a Spicer brand CB. It’s been good ever since.
That was 2 - 3 years ago.
I hope you get this solved. Good luck!

 

Yea. But a better way to test would be just slowly rotating the drum (while it's still on) and listening for where in its rotation, it drags on the shoes. If it only drags on a small portion of it's rotation, then good chance your drum is out of round (which is a known cause of vibration).

 

1) So I ended up testing both wheel bearings and no play at all
2) I also checked the rear drums and noticed a scratching/rubbing noise from the rear right side( where I first heard noises) ….. I also
https://youtube.com/shorts/gWxPsBOoVWs?feature=share
recorded a vid I’ll attach to the reply
3) I also recorded a video on the vibration Inside my truck https://youtube.com/shorts/lQoMBhBNlQE?feature=share

 

That scratching is good, it's the shoes dragging on the inside of the drum, as they should. Were both sides dragging about the same? Or did one not drag throughout it's entire rotation?

 

Nope only one side was dragging and rubbing, the left side didn’t drag nor made any noise

 

I'd look into that further then. Maybe try using the manual adjuster to adjust the shoes until they drag and see if they'll drag symmetrically (consistent drag throughout the whole rotation). If not that drum may be out of round

 

So drag is normal ? And then the manual adjuster is inside the drum? Honestly I don’t know much about drum breaks lol I’m pretty clueless

 

that's some mad vibs you got there. I'd put on my seat belt if I were you.
Good to hear it's not wheel bearings.
As for drums you could put in reverse and ease back while engaging the e-break on and off or
remove tire, sledge hammer the drum loose then remove, put oil catch pan under brakes an spray brake cleaner everywhere, then w/ a screw driver turn the adjustment wheel down towards you. Once you see it you know. Check and clean drum and reinstall
I would go w/ the latter of the two cause it's old and you can see what is going on.

 

Okay so just clean the inside of the drum and adjust the adjuster on the side that does not rub until it start to very little ?

and for the first option is it just putting the car in reverse and pulling the e break slightly repeatedly ?