Friends need help. Vibrate after 70 mph.

[Svetla]

I need help. Vibrate after 70 mph.
Good afternoon. Not so long ago, I bought a copart dodge ram 1500 2018 from auction. Mileage 30,000 miles hit a casing axle housing. I replaced housing axle, axle shaft left, right. After 65-70 miles per hour, I have a vibration in the body. I replaced the drive shaft, 3 times did balancing the wheels in the center and on the mounting holes. Nothing helps. Good people tell me what to do to remove the vibration. I don’t know what to think. Wheel camber is not broken. body geometry and frame were not affected.

 

[Tim Garceau]

Sway bar, links, upper and lower control arms, and track bar should be new as well. If you still have issues, the frame or mounting joint is skewed. Input Shaft needs to be laser aligned to rear diff.

Always risky fixing a chassis not parallel to the body.

 

[Svetla]

Sway bar, links, upper and lower control arms, and track bar should be new as well. If you still have issues, the frame or mounting joint is skewed. Input Shaft needs to be laser aligned to rear diff.

Always risky fixing a chassis not parallel to the body.

Thanks. Rear suspension levers that were damaged. They're all new. The camber and convergence of the wheels showed that the bridge is in tolerance. You say Input Shaft needs to be laser aligned to the rear diff. Which one are you talking about?

 

[Svetla]

If you still have issues, the frame or mounting joint is skewed.

But if the frame was skewed or fixed, then the rear axle would be crooked and I would be pulled to the side. But the car goes exactly in a straight line. He doesn't want to go anywhere.

 

[Tach_tech]

When you had the tires balanced, we’re they road forced?

 

[Svetla]

When you had the tires balanced, we’re they road forced?

Yes, I balanced the tires 3 times. And changed the tire. The wheel geometry is smooth.

 

[Tach_tech]

Yes, I balanced the tires 3 times. And changed the tire. The wheel geometry is smooth.

Do you remember what the road force numbers were? Any of them on the high side?

 

[Svetla]

Do you remember what the road force numbers were? Any of them on the high side?

sorry. what do you mean ?

 

[Tach_tech]

Are you sure the tires were road force balanced? Tires can balance fine but if the road force is excessive you’ll have vibrations.

A shop has to have the right machine to test for road force.

The road force is measured in lbs. once you start getting up past about 25lbs of road force you may start noticing a vibration.

 

[Svetla]

Are you sure the tires were road force balanced? Tires can balance fine but if the road force is excessive you’ll have vibrations.

A shop has to have the right machine to test for road force.

The road force is measured in lbs. once you start getting up past about 25lbs of road force you may start noticing a vibration.

This is the first time I've heard of this. To be honest, the vibration from 0 mph starts. It’s just palpable after 65 mph. I definitely exclude the wheels. They are balanced. There are no vibrations in the steering wheel. I have it in the body, it looks like a driveshaft, but I changed it. Yesterday I took off the front driveshaft and tried to drive. No changes. Today I'll try to throw the whole rear differential from another car. On the service was 3 times in different places. Everyone does not understand.

 

[Tach_tech]

Out of balance tires don’t just shake the steering wheel. That’s only if the fronts are out. If the rears are out, you’ll feel it in the seat or cab.

You’re saying the vibration starts as soon as you are moving just gets much worse at highway speeds?

 

[Svetla]

Friends. Has anyone changed the transfer case? Is it possible to change it without a service and a pit? I have oil dripping from there, which is very strange on my mileage of 30,000 miles.

 

[Svetla]

Out of balance tires don’t just shake the steering wheel. That’s only if the fronts are out. If the rears are out, you’ll feel it in the seat or cab.

You’re saying the vibration starts as soon as you are moving just gets much worse at highway speeds?

Yes exactly. It starts from 0 to 20 miles per hour. Then it decreases and after 65 mph it intensifies. This vibration broke my front crosspiece of the driveshaft. That is why I am so worried about this problem. I would not want the second propeller shaft to break.

 

[Tach_tech]

The transfer case rear output seal is easy to change. Just have to remove the rear driveshaft.

Are you able to put the truck on jack stands and run it in gear while watching the driveshafts for any wobbling.

It’s entirely possible the output shaft of the transfer case is damaged causing an imbalance.

 

[Svetla]

The transfer case rear output seal is easy to change. Just have to remove the rear driveshaft.

thank you friend. I meant to change the whole box. I have the same car nearby. I want to remove from a working car with a mileage of 13000 mile and put it on mine. Is it difficult to change the transfer case if there is no service?

Are you able to put the truck on jack stands and run it in gear while watching the driveshafts for any wobbling.

It’s entirely possible the output shaft of the transfer case is damaged causing an imbalance.

Yes, I jacked the rear wheels, turned on 2WD mode and turned it around. Visually, there is no hesitation. But at speeds greater than 70 miles, an inner beat is felt. I decided to act by exclusion. Today I will change the rear differential as a whole. And try to ride. If this does not help, I want to try changing the transfer case. This can go crazy, but I have no choice)))

 

[Svetla]

I will try by exception

View attachment 198545

 

[Svetla]

changed the entire rear axle. No change.

 

[chri5k]

I would lean towards a rear driveline issue since it took a good hit to the left rear wheel. Imbalance, bent or misaligned parts can cause undue stress on the drive shaft which may be what caused that seal to fail prematurely. Your best bet is to take it to a driveline shop so they can check the alignment, balance, etc of all the rear drive line components. The engine mounts, transmission /transfer case mounts, rear axle, and rear suspension all function as a system with relation to the drive line. It is hard to diagnose the entire system one piece at a time. The shop really needs to see / work on the whole vehicle.

 

[Svetla]

I would lean towards a rear driveline issue since it took a good hit to the left rear wheel. Imbalance, bent or misaligned parts can cause undue stress on the drive shaft which may be what caused that seal to fail prematurely. Your best bet is to take it to a driveline shop so they can check the alignment, balance, etc of all the rear drive line components. The engine mounts, transmission /transfer case mounts, rear axle, and rear suspension all function as a system with relation to the drive line. It is hard to diagnose the entire system one piece at a time. The shop really needs to see / work on the whole vehicle.

thanks. I will try to change the transfer case from another car in 2018.We have a problem in our city with the maintenance of these cars. No one knows them.

 

[Svetla]

dear friends, I need your advice. I want to try changing the transfer case and see what changes. I have a 2017 car. a friend is willing to lend me his handout box from the 2018 car. But we have different numbers. Can I try on the rear-wheel drive without connecting the front-wheel drive? would it hurt my car?