Suspension stiffness, no rear weight, causes discomfort

What's the deal with stiffness? Is it because there's no weight in the back? I hit insignificant bumps in the road and my passenger seat vibrates and shake pretty badly. In fact, to me I could imagine in time welds breaking in the frame of the seat. It's extremely irritating. I haven't had much weight in the back yet to see if it completely changes things, but I imagine it would.
So what's is the best option to be able to have some comfort light and adjust for pulling or having more weight?

Cause I almost hate driving it. It just feels like it's slowly ruining the truck and I'm taking normal driving on paved roads with slight deviations.
I know it's not just my truck and I would think there should be a solid solution
Any info would be interesting to hear

 

What are your tire pressure?
What vehicle are your comparing this ride to?

 

Also let us know what tires you have. E rated tires can be stiff.

 

Maybe your passenger seat is loose?

I have a stock 2018 SR5, and it rides most good. I did put a set of 2018 Sport wheels on it with 265/65-17 Toyo Open Country tires, but that's still a stock size.

 

I'll check tire rating in morning, but psi is 35 all around

 

because it's stock
-leafs
-hangers
-shocks

 

35 is high, I believe the stock specification is 30 PSI. Check tire load ratings.

Other than that, if adding +250-300 lbs of weight in the rear bed fixes it, you're good to go. These are (light) trucks, they are designed to carry stuff.

If adding weight doesn't fix it or makes it even worse, something is wrong with your rear suspension. Either the shocks, or the springs, or both, are worn out.

 

No. It's the fact that the seat isn't loose that bothers me. It's an extremely stiff wiggle, but i see it out of the corner of my eye all the time. Sometimes the rear almost feels like it slightly skips to the side a hair if it's a bump. It's only got 40k on it all driven by my father who passed away last year. It looks like it's 100% brand new all the way around. He kept up on everything and took it to all the recalls.
I've had it a few months and I like the truck but, to me, the suspension is just ridiculous the way it is and my last truck was a 04 dodge ram 1500 4x4 P.O.S that I beat the shit out of. I drive the yota just like my dad did. Resale value of these things are jaw dropping to be honest lately.
I have a feeling ill be looking into a suspension that I can adjust with weight requirement.
Every time a piece of that mild steel wiggles on this truck it's just accelerating the aging process of the whole thing. It was probably intentional from the manufacturer to turn more vehicles and make more $. That's my opinion tho. If I can turn on cruise control and not have to touch a gas or brake pedal or worry about hitting anything... I'm pretty sure they can make the ride a whole lot smother than it is. But I'll check the tire type in morning.

 

A few weeks ago I had about 200# in back. Maybe a little more and I did notice it was not as bad.

I get it, it's a light truck. Especially in the rear where there no engine coupled to a transfer case and transmission. I know my dad would have set the pressure for the tires on the dash so I assume the "experts " that sold him the tires would have done it for him. But that's just guessing. I should probably look into the stuff before I keep complaining too much more.. hehe..

 

And the 3rd gens are almost 800#'s heavier than the 1st gens.
I've been driving tacomas, predominantly stock, for 21 yrs.
Without weight they're all like rocks skipping across water.
I put bigger/heavier tires on, beefed up the suspension, added 150#'s of weight and removed the swaybar.
Handles really well.

 

FWIW, I don’t think my 23 rides rough, but the shaking pass seat drove me crazy. It would rub on the center console and make noise. I folded a microfiber towel and jammed it between the side bolster and center console on mine and I haven’t thought about it since.

 

Tire pressure, find the sweet spot, I liked 32-34 psi

 

Welcome to the forum

Tire pressure makes a big difference in ride quality on lighter vehicles, the sticker on your door jamb probably recommends about 30 psi cold, give it a try and report back.

If you are carrying a heavy load increasing the pressure a few psi will make the loaded truck feel more stable.

 

defiantly start with tire pressures, even 2-3 psi can make a big difference,,,, especially in an unloaded bed/rear.
Post pics of springs, shocks, etc, maybe OP replaced or modified at some point? Even if they claimed stock or didn't tell you.