Bouncing at 50mph

My truck has a 3 inch lift and had 32’s. With the 32’s it slowly (I think) gained a bounce at 48-50mph so I did research and replaced my carrier bearing. Did nothing. Got a new set of 32x12’s. Did nothing. So I don’t think it’s an after market wheels problem, nor a balancing problem and carrier bearing is out of the way. Any other ideas? Leaf springs might be a little worn out. The truck does have 196,000 on it. Transmission bushings? Also when I did my carrier bearing u joints seemed fine to me although I’m not a pro. Also the truck vibrates at around 70 like an actual vibrate not a bounce like it does at 50. Someone help me please the bounce is getting quite annoying.

 

How old are your front shocks and springs and what setting if Bilsteins.
Air pressure in your tires as must be E rated so try lowering that to rule out.
New tires so hope they were mounted and a try road force balance done to test if out of round and/or heavy spots.
Rims/wheels will show up on that road force also and did you hit anything lately and if aftermarket are they hub centric and correct lugs.
If using wheel spaces they could be off.
With all the construction going on and big dump trucks in FL the roads here are all getting rippled so that has made my truck bounce more sometimes so try a different route and rule that out.
Then of course driveshaft angle can cause vibration/bounce feeling so if you have good jack stands run it on them (if properly supported and safe) and see if actually a rear or driveline issue.
Look at the rear brake drums as if they are original they can throw a weight off as mine did and you feel that.
That's all I got hope it helps.

 

Does it always do it no matter what road you are on?

I've found that both my tacomas are very sensitive to road imperfections. Certain stretches of highway on my commute with give me the slight bounce sensation. My 2nd gen did it stock with stock wheels and tires and it still does it with a lift kit, SCS wheels and new tires. Same with my bone stock 3rd gen work truck.

Seems like stiffer tires like e loads makes it worse.

 

I might try force balancing the wheels even thought the place that did them said there should ride like a Cadillac. I posted another thread with more information and another vibration I’m starting to feel. Rims and lugs should be all good. So I can rule that out.