JXB Driveshaft Center Support

[Stevedbvik1]

Are both of you “stock” with no lift?

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[Dereku]

I have 5100s on the lowest setting other than stock. It is like 0.8” or something. If anything it improves the driveline angle by shifting weight backwards. I added a washer between the top isolation bushing and the cross member today. See pics. Less vibration. I will try their other bearing bushing tonight. I think I know my recommendation for the street bushing, slightly harder isolation bushings and a track hardness bearing bushing with the vibration holes in it. See if my DIY engineering degree pays off.

 

[Dereku]

Zero vibes now. Not as solid but I am a picky ass lol. Ran my idea for a more solid mount past them, ill see what they say.

 

[Racket]

Surprised their R&D didn't find this. It's a good looking accessory- not that I'd invite people to crawl under the truck to admire but I would hope the function is to stabilize the driveshaft. That there is vibration at specific speeds makes me wonder what goes on with the standard Ford product and if - with fine tuning the driveline could be refined like a high end vehicle.

I'm curious how the manufacturer responds and how this progresses.

I leveled my Ranger with Eibach pro lift struts up front then the UK multileafs in the back took the rear back up. Am I really changing the drive train geometry on my RWD?

 

[Dereku]

Surprised their R&D didn't find this. It's a good looking accessory- not that I'd invite people to crawl under the truck to admire but I would hope the function is to stabilize the driveshaft. That there is vibration at specific speeds makes me wonder what goes on with the standard Ford product and if - with fine tuning the driveline could be refined like a high end vehicle.

I'm curious how the manufacturer responds and how this progresses.

I leveled my Ranger with Eibach pro lift struts up front then the UK multileafs in the back took the rear back up. Am I really changing the drive train geometry on my RWD?

Technically yes. You are supposed to shim the rear axle so the pinion faces slightly more up. But 1-3 inches is probably fine unless you experience shudder. Will your u joints fail at 150k instead of 175k? Maybe, or maybe not. The added shudder after lifting is the tell tale sign. You might benefit from putting a few washers to lower the oem carrier bearing as well, if you experience shudder.

 

[JoeDirt03]

Are both of you “stock” with no lift?

Stock.

 

[JoeDirt03]

Zero vibes now. Not as solid but I am a picky ass lol. Ran my idea for a more solid mount past them, ill see what they say.

I emailed back and fourth with them today and they offered to send the different bushing and also gave some tips of how to soften the ones I already have. Honestly driving to work today I notice the vibration but it's not terrible and the truck drives so much better I'm not sure I want to change anything just yet. They didn't seem worried that the vibration would hurt anything.

 

[JoeDirt03]

If I try anything it would probably be option 2 or 3. I'm not sure I like the idea of putting the spacers in between the two halves

 

[Racket]

I'm not sure about an even softer bushing is the way to go although seeing the bushing detail is interesting. I don't know if giving the bearing a loose mount would be desirable for long and if it wouldn't introduce other movements. It may be inherent in the rear end and how the alignment sounds like it's playing into this but a truck that might be carrying a load, towing or on rough terrain seems like it's going to experience a lot of changes and I've never imagined how to compensate for that.

 

[Dereku]

If I try anything it would probably be option 2 or 3. I'm not sure I like the idea of putting the spacers in between the two halves

The spacers made mine feel worse. I am not cutting holes in my bushing so I didn’t try it. I do want to try the street bushing on the bottom and the new bushing with holes on top. Give me a balance. Because with the new bushing there is some more play but far better than stock. I really this it is related to the softer mount to the cross member. Either way the end results are worth it. Even the slight vibration isn’t bad.

 

[21rangerCactus]

I would put some miles on it before changing anything. The bushing will break in a bit.

On my gto I switched to poly motor mounts. At start up there was a noticeable vibration. Driving at 3500rpms i could feel the vibrations. A few weeks of driving and it was all gone.

Thinking back.. It was the same situation when I replaced all the suspension rubber bushings to poly. Intially it vibrated and then it all smoothed out.

 

[Dereku]

I would put some miles on it before changing anything. The bushing will break in a bit.

On my gto I switched to poly motor mounts. At start up there was a noticeable vibration. Driving at 3500rpms i could feel the vibrations. A few weeks of driving and it was all gone.

Thinking back.. It was the same situation when I replaced all the suspense rubber bushings to poly. Intially it vibrated and then it all smoothed out.

That’s a good idea. I did put 1000 miles on it in last 2 weeks. Might not be enough

 

[Dereku]

I'm not sure about an even softer bushing is the way to go although seeing the bushing detail is interesting. I don't know if giving the bearing a loose mount would be desirable for long and if it wouldn't introduce other movements. It may be inherent in the rear end and how the alignment sounds like it's playing into this but a truck that might be carrying a load, towing or on rough terrain seems like it's going to experience a lot of changes and I've never imagined how to compensate for that.

Go wiggle your stock driveshaft lol. There is no softer bushings unless you want to use a balloon. I was amazed by the movement. The softer bushing from JXB is substantially harder than stock. Overall driving experience is more solid but smooth. The street bushing was extremely solid feeling but the vibration at my most common in town speed was too much.

 

[Stevedbvik1]

Go wiggle your stock driveshaft lol. There is no softer bushings unless you want to use a balloon. I was amazed by the movement. The softer bushing from JXB is substantially harder than stock. Overall driving experience is more solid but smooth. The street bushing was extremely solid feeling but the vibration at my most common in town speed was too much.

Jello comes to mind. Watered down Jello

 

[Racket]

Jello comes to mind. Watered down Jello

Ah well. The goal would be to get alignment as close to perfect as possible and keep it there first? But then a truck - when used as a truck - really goes through a range of suspension travel.

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