JXB Driveshaft Center Support

[Dereku]

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.

The rear axle won’t cause any issues with this. Unless the frame is bent or rear axle is seriously misaligned. The oem driveshaft has an allowance for balancing based on how much the oem bushing can absorb. All that absorption is a lack of efficiency. Im trying to find a happy medium between rattling my teeth out and limp noodle feeling. Efficiency is the reason I modify things. Making part of a system more efficient makes me feel successful. Going fast is typically a fun byproduct

Sponsored

 

[JoeDirt03]

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.

I talked with Jay and he had me measure the angle between the two halves of the truck. He wasn't too worried about it being at a slight angle. I've got a lot of weight on the back of mine so it sits down into a lot of its travel.

 

[Racket]

We'd have to assume the bracket itself is perfectly aligned along the driveline well? Understanding there is tolerance built in and a squishy stock bushing would make want to isolate where these vibrations at specific speeds ranges are coming from.

It's a premium accessory and I'd expect a premium experience.

 

[JoeDirt03]

Did a mini launch on my way home from work. The shifts were so firm it chirped the tires hitting second not even full throttle. I only saw 15 psi of boost but each shift was hitting hard. I can't say I ever remember the shifts being so firm until getting the JXB carrier.

 

[Dereku]

Did a mini launch on my way home from work. The shifts were so firm it chirped the tires hitting second not even full throttle. I only saw 15 psi of boost but each shift was hitting hard. I can't say I ever remember the shifts being so firm until getting the JXB carrier.

I agree. I would say a crisp feel verses just firm. Its decisive. I launched the other day and seen just over 20psi. It responded instantly.

We'd have to assume the bracket itself is perfectly aligned along the driveline well? Understanding there is tolerance built in and a squishy stock bushing would make want to isolate where these vibrations at specific speeds ranges are coming from.

It's a premium accessory and I'd expect a premium experience.

Bracket doesn’t need to be perfectly aligned per se. it grips the bearing, thats it. And when you go poly anything on a vehicle you get more vibration and noises. I have received a premium experience by getting a slightly softer bushing mailed to me for free. If you have never done poly or solid motor mounts then you wouldn’t understand the trade off here.

 

[Racket]

It sounds like the reason I don't experience any vibrations at the speed ranges above is because of the pillowy factory bushing - the poly (regardless of the stiffness) transmits it to the frame a those specific speeds. This reminds me of when I rebuilt suspensions in sportier cars - sometimes solid steel bushings in cradles, aircraft quality bearings in control arms, delrin or poly or spherical bearings in end links. Sometimes new rubber was best.

The JXB goes from solid mounting against the frame to poly bushings. I wouldn't expect a lot of isolation there. The two poly bearing choices are transmitting the vibration at specific speeds to the frame at differentperceptible levels. The cause of that specific vibration at those speeds probably can't be resolved with this option although if it was eliminated it would make it more appealing. I'm not downing anyone's choice to go with it but if it led to actually refining driving I would incorporate one. I get the 20 psi boost according to my Banks guage and can chirp the Michelins when I desire already and the drivetrain isn't an issue (yet) although I expect lubing the driveshaft yoke is in my near future. It's almost time for another differential oil change and I've got another thirty five thousand or so miles before I change the transmission fluid and filter again.

 

[Dereku]

It sounds like the reason I don't experience any vibrations at the speed ranges above is because of the pillowy factory bushing - the poly (regardless of the stiffness) transmits it to the frame a those specific speeds. This reminds me of when I rebuilt suspensions in sportier cars - sometimes solid steel bushings in cradles, aircraft quality bearings in control arms, delrin or poly or spherical bearings in end links. Sometimes new rubber was best.

The JXB goes from solid mounting against the frame to poly bushings. I wouldn't expect a lot of isolation there. The two poly bearing choices are transmitting the vibration at specific speeds to the frame at differentperceptible levels. The cause of that specific vibration at those speeds probably can't be resolved with this option although if it was eliminated it would make it more appealing. I'm not downing anyone's choice to go with it but if it led to actually refining driving I would incorporate one. I get the 20 psi boost according to my Banks guage and can chirp the Michelins when I desire already and the drivetrain isn't an issue (yet) although I expect lubing the driveshaft yoke is in my near future. It's almost time for another differential oil change and I've got another thirty five thousand or so miles before I change the transmission fluid and filter again.

Ok i retract my statement you get poly and the trade offs. I didn’t think there was anything wrong with the oem bushing until I tried this. The clunks are gone. I thought I had to lube the shaft again. The comfort bushing they sent me is perfect. Less play zero vibration. Definitely a more direct feeling. It was this or a one piece in my future. This did it and im happy.

 

[Stevedbvik1]

Ok i retract my statement you get poly and the trade offs. I didn’t think there was anything wrong with the oem bushing until I tried this. The clunks are gone. I thought I had to lube the shaft again. The comfort bushing they sent me is perfect. Less play zero vibration. Definitely a more direct feeling. It was this or a one piece in my future. This did it and im happy.

Wondering if I should reach out to them and get what you’ve done? Or should I just try the street bushing first? One thought that I’ve had is that I have a Tremor that comes with a bit more lift from factory than stock 4x4 and also the Rzeppa/CV joint at the rear differential. So things may respond differently than what you’ve experienced. I’m also going with their full set up, bearing and all. Nice that there’s options though.

 

[awd.nv]

I wonder if any of you guys take the truck to a driveshaft shop and have them balanced, would the issue go away completely. I can't image it cost too much. Even if it was $200, would be great to do anyway.

Never saw this product before but will keep it in mind.

The issue I have is that I almost feel axle wrap if I have a spirited launch in sport mode. I have wondered about the center support wrote it off since I didn't think there were parts available.

Cal Tracs only makes their bars for older rangers

 

[Racket]

I didn’t think there was anything wrong with the oem bushing until I tried this. The clunks are gone. I thought I had to lube the shaft again. The comfort bushing they sent me is perfect. Less play zero vibration. Definitely a more direct feeling. It was this or a one piece in my future. This did it and im happy.

I mean that's what I'd expect and appreciate someone who did the extra work sorting out the better bushing. My understanding is the one piece isn't recommended by Tom Woods for trucks going over certain speeds... If - and I haven't tried to find out - the stock Ford driveshaft is essentially the same as a Mustang or any pursuit vehicle Ford makes for the police this bearing bracket makes more sense. I haven't looked on any other forums that might be using it more than us on 5G (Mopar?) and frankly I value how our little forum drills down on parts and helps weigh the values.

I've worn out poly bushings too.

I mean, there was some heated exchanges about bumpstops...

 

[Dereku]

I mean that's what I'd expect and appreciate someone who did the extra work sorting out the better bushing. My understanding is the one piece isn't recommended by Tom Woods for trucks going over certain speeds... If - and I haven't tried to find out - the stock Ford driveshaft is essentially the same as a Mustang or any pursuit vehicle Ford makes for the police this bearing bracket makes more sense. I haven't looked on any other forums that might be using it more than us on 5G (Mopar?) and frankly I value how our little forum drills down on parts and helps weigh the values.

I've worn out poly bushings too.

I mean, there was some heated exchanges about bumpstops...

The reviews I seen of this were on the Challenger/Charger, Audi and BMW forms. Thats what made me pull the trigger.

Impressive to wear out a poly bushing, I have never done that and I put some miles/abuse on my trucks.

Were those heated exchanges with me? Hope not lol. I know I can get carried away.

 

[Dereku]

Roughly 1000 miles on the comfort bushing and im happy. Zero shakes, still feels solid. Driveshaft hasn’t fallen off yet and pole vaulted me into an overpass.

 

[JoeDirt03]

Roughly 1000 miles on the comfort bushing and im happy. Zero shakes, still feels solid. Driveshaft hasn’t fallen off yet and pole vaulted me into an overpass.

I've got maybe close to that on the street bushings and it's feel like most of the vibrations are either gone or I don't notice it anymore. When it's hot the vibration is gone completely.

 

[Dereku]

I've got maybe close to that on the street bushings and it's feel like most of the vibrations are either gone or I don't notice it anymore. When it's hot the vibration is gone completely.

Thats awesome! Might try the street bushing again in the future.

 

[JoeDirt03]

Thats awesome! Might try the street bushing again in the future.

Yeah. The temps went back down to the 60s today (was in the 80-90s) and I noticed it a bit more.

Sponsored