solving wheel hop

i just recently had deaver springs, archive hangers and shock relocates, and king 2.5 x 12's installed with a trutrac in the rear end.
upon hard acceleration the rear bounces rather aggressively. i know its not good. what are solutions for this. note- the truck is modified and supercharged. any advice would be much appreciated. thanks!

 

May have to install a trac bar. Especially if your heavy footed.

 

My man, this sounds like an issue that IRS vehicles have over SRA equipped vehicles.

If you are having hop issues I would strongly suggest inspecting the pack and making sure that it is not the cause of your hop situation, I would also put into question the valving of the shocks potentially if the pack can be ruled out as the main source of the cause. Trutracs are known to lay down the power to the ground so I doubt you have a faulty unit, but all must be considered here. How hard are you launching this thing at take off?

 

ive gt a fabricator on stand by with the same thought. just looking for feedback. does anyone have a traction bar design they would reccommend?

 

hard. im told these shocks were valved and set up for this truck. could the deavers be too soft?

 

Did you get the valving numbers? C & R?

It's very possible. What leaf pack PN is it? Overload retained or no?

 

i dont have them but i can ask the guy, glorifiedwelder. deaver u4201 9 leaf. just put the idels carrier in last weekend. what a bitch. custom mount had to be made. i ordered new shims to get my pinion angle better. those go in soon.

 

It'll definitely have nothing to do with the carrier bearing unless your angles are way out of whack, like over half a degree out of whack, but if that was the case you could actually peek under the truck and you could see the super off angle, it wouldn't look straight all the way through. No don't worry about getting the numbers, he's a good guy, smart too, he knows what he is doing on these trucks. Let me investigate the the U4201 pack. Something tells me it is very soft, like so soft you can jump on them and bend them.

 

the truck rides more firm than stock. im out 1.7 degrees. ordered 2 degree shims. i k ow i need those. i dont have the funds or desire to change springs. i think a trac bar is the solution. i appreciate you looking in to this.

 

It is the U402 expo pack right?

Whoa! You are out 1.7 degrees for the carrier bearing?! How much lift do you have in the front and I also need to know how thick the rear leaf pack is, height wise in inches.

 

thats the pack. i can measure tmrw. im not sure if its the carrier. think it was axle to lower shaft is out.

 

Yeah I'll definitely need some measurements to be able to better say what the issue could be. Pictures, any and all of it helps, I wonder if it actually is axle wrap, though based on how strong that pack is which is supposed to be stronger than stock it shouldn't be an issue. A lot of variables.

 

I’ve got an angle finder to test it. Total height is similar as before though, I don’t think it has anything to do with the carrier. I suspect it also has something to do with the new shock setup mounting both shocks on the forward side of the axle vs opposing sides to stabilize the axle like stock. That would allow more axle wrap to the point where the springs push it back and you could get into somewhat of a bouncing axle wrap effect. If that is the case a trackbar would resolve the issue.

 

ill get #s soon.

 

ive got shims coming. jim used his digital angle finder. 1.7 out. so 2* shims are coming.

 

Carrier misalignment would cause vibes, not hop though.

 

Actually I was thinking as well that the shock mounting locations could be a contributor to the issue as well, if not the source.

I'm interested to see more as this develops and if needed, ultimately putting a trackbar on his ride.

 

My thought is with the shocks mounting on just the forward side, vs opposing sides, they effectively allow the axle to rock back under acceleration far more than it would other wise. Basically causing really bad axle wrap without an opposing shock to reduce the effect (hence why all OEM setups have opposing shocks). Once the axle wrap hits a critical point and has loaded the springs with excessive wrap, the springs spring back forward and cause the hop. The process repeats until the truck has enough speed the excess torque is not an issue. At least that is my theory. If that is the case a track bar will prevent the axle wrap and resolve the problem.

 

@12TRDTacoma my spring pack measures 2 3/4"

 

i have a traction bar i would partially recommend. it's three parts, the bar and the front & rear mounting brackets.

i have a Budbuilt trac bar for my 3rd gen. the bar is good and the front bracket is fine. the rear bracket is 10 steps beyond a dumbass design and i have no idea how they let that go up for sale. it literally tore a big hole in my rear axle housing from the shit design. i fixed the hole and removed the bar for now. i have planned to have a fully gusseted solution fabbed maybe later this year. it will require a bit of added steel welded up to the axle housing to handle the forces. but the news you can use is that it performed beautifully before it started to tear stuff up.