Wits end

[no-tel-in]

Yes, I have searched the forums a good deal but cant seem to make this right.

My truck, cannot, will not and has never been smooth, since I've had it atleast, for 2yrs and 50k now.

Start with what I've done and replaced.
Rotors x4
Pads x4 (Hawk)
Caliper x1
Sway links x2
Sway bushings x2
All 3 rear U-joints (Spicer)
Totally new Carrier Bearing
Tranny (BTS)
Front Hub (Left)
Ball joints x4
Sets of tires x2 (Currently Kumho KL78 315/70/16)
Rear driveshaft balanced (Twice)
New Bilsteins x4
Bilstein dual stabilizer
Various CB shims
Multiple different Alignments
Tires balanced more than once.

Probably more than that.

My wondering problem I believe I have down to the steering gear (200k truck)
It will just go whereever it wants, PITA to drive. All the Tie rod ends are tight, as well as pittman arm to draglink.
Thoughts on that?

Vibration, I am close to the end of the road.
Had a different shop today balance the driveshaft and do a front end alignment and its better but still has an annoying vibration. Very hard to describe, seems to come and go, but above 73 mph, it feels like its going to come apart. From 0-30, pretty smooth. above that its hit or miss. It has the 43-49mph shake everyother super duty has, but this one is worse. Then it seems to shake sometime and not, nothing predictable. When I am braking it vibrates pretty bad indicating warped rotors... All new rotors and pads, same result. I really just want it to be pretty tight and smooth, IDK anymore, tried everything I can, now Im here lol

[no-tel-in]

Bump BTT.... Any ideas?

[Shadowfax]

leaf spring and trac bar bushings might need replacing.

[no-tel-in]

Originally Posted by Shadowfax

leaf spring and trac bar bushings might need replacing.

Already done both of them, tight as can be

[CT Performance, Inc.]

400lbs tight?
Swap rims and tires with someone.
Hub Centric ballance?
Take Rear DS off from TC and rotate 90*..till it helps, Flange is not concentric..
Rear pinion 2* lower.

What is the alignment set to..all specs

[no-tel-in]

Originally Posted by CT Performance, Inc.

400lbs tight?
The bolts, yes. Should I have a longer track bar for my add-a-leaf?
Swap rims and tires with someone.
Good idea, will do that tomorrow
Hub Centric ballance?
Yes
Take Rear DS off from TC and rotate 90*..till it helps, Flange is not concentric..
Done this many times, I have it in the position that feels best
Rear pinion 2* lower.
How do I do this

What is the alignment set to..all specs
I didnt get a printout

I now have a redhead gear on order, going to get the XRF Tie rods and do those while I'm at it, also thinking about doing X-code springs while doing all this (not 100% satisfied with the add-a-leaf)

Do I need a drop pittman arm with those springs, or track bar?

Thanks

[99dieselsmoke]

Originally Posted by no-tel-in

Yes, I have searched the forums a good deal but cant seem to make this right.

My truck, cannot, will not and has never been smooth, since I've had it atleast, for 2yrs and 50k now.

Start with what I've done and replaced.
Rotors x4
Pads x4 (Hawk)
Caliper x1
Sway links x2
Sway bushings x2
All 3 rear U-joints (Spicer)
Totally new Carrier Bearing
Tranny (BTS)
Front Hub (Left)
Ball joints x4
Sets of tires x2 (Currently Kumho KL78 315/70/16)
Rear driveshaft balanced (Twice)
New Bilsteins x4
Bilstein dual stabilizer
Various CB shims
Multiple different Alignments
Tires balanced more than once.

Probably more than that.

My wondering problem I believe I have down to the steering gear (200k truck)
It will just go whereever it wants, PITA to drive. All the Tie rod ends are tight, as well as pittman arm to draglink.
Thoughts on that?

Vibration, I am close to the end of the road.
Had a different shop today balance the driveshaft and do a front end alignment and its better but still has an annoying vibration. Very hard to describe, seems to come and go, but above 73 mph, it feels like its going to come apart. From 0-30, pretty smooth. above that its hit or miss. It has the 43-49mph shake everyother super duty has, but this one is worse. Then it seems to shake sometime and not, nothing predictable. When I am braking it vibrates pretty bad indicating warped rotors... All new rotors and pads, same result. I really just want it to be pretty tight and smooth, IDK anymore, tried everything I can, now Im here lol

I have the same issue. I have a new drive shaft, new u joints, carrier bearing. The only thing Im wondering is if it has something to do with my rear wheel bearings. I have 190k on it and this just started one day when I passed someone. Mine feels like my truck is gonna fall apart at 65 when I let off the throttle. But when Im on it, it isnt there. I hauled a car from Gregory, South Dakota to Norther Lower MI and when I had the car on the trailer, the vibration was gone.

[no-tel-in]

Originally Posted by 99dieselsmoke

I have the same issue. I have a new drive shaft, new u joints, carrier bearing. The only thing Im wondering is if it has something to do with my rear wheel bearings. I have 190k on it and this just started one day when I passed someone. Mine feels like my truck is gonna fall apart at 65 when I let off the throttle. But when Im on it, it isnt there. I hauled a car from Gregory, South Dakota to Norther Lower MI and when I had the car on the trailer, the vibration was gone.

Dont know, but we basically have the same number of miles, and mine has been doing this since like early 170's. And mine does all the time, weather im in the pedal or not