vibration after toytec boss lift

[arsonbear]

Just got a 3” Toytec Boss lift on my 01 limited 4wd. As soon as I jumped on the highway to head home, I noticed a pretty bad vibration starting around 55 and getting worse as I went faster (only went up to 70). Basically feels like driving over washboard at speed, or those rumble strips on the side of the highway that tell you you’re driving off the road. Not as severe as that, but same feeling. Issue is unchanged if in 2 or 4, and acceleration has no bearing on it.
Went back to the shop that installed the lift (and who had also just balanced my new duratracs- 265/75/16), drove it with them and they said it felt like a driveline issue. Talked to Front Range Drive Line here in Denver and they advised I remove the rear driveshaft and see if it goes away. Did that, and the issue remains the same, but now it gets much worse when accelerating. At 65, push the pedal down and the vibration gets way worse, let off and it goes back to the previous level.
Had Front Range replace the axle side U joint (they thought it was getting to be that time) and balance it, threw it back in and removed the front drive shaft (could not find confirmation online if 01 Limited T4R uses an ADD or not). Same issue, back to the way it was before (acceleration has no impact, vibration from 55 up).
Should also mention everything was perfect before the lift, and the vibration got somewhat better as the new springs settled (not sure there’s a direct correlation there, but it kinda seemed tied to that).You can feel this in the whole truck, but especially in the steering wheel, and it feels front end-ish to me. What do you guys think? Where do I look next, CV joints in the halfshafts? They did install the diff drop that came with the Boss kit.

 

[KaliKid]

Did you get an alignment? You didnt mention it in your post and that would solve the problem if it hasnt already been done. My guess is they took off your LBJ to put the lift on and the caster/camber were knocked out of place.

 

[arsonbear]

Bah, knew I'd forget something. Yes, alignment done right after the lift, and then re-aligned two days later because they didn't get the steering wheel straight.

 

[sport05]

Just got a 3” Toytec Boss lift on my 01 limited 4wd. As soon as I jumped on the highway to head home, I noticed a pretty bad vibration starting around 55 and getting worse as I went faster (only went up to 70). Basically feels like driving over washboard at speed, or those rumble strips on the side of the highway that tell you you’re driving off the road. Not as severe as that, but same feeling. Issue is unchanged if in 2 or 4, and acceleration has no bearing on it.
Went back to the shop that installed the lift (and who had also just balanced my new duratracs- 265/75/16), drove it with them and they said it felt like a driveline issue. Talked to Front Range Drive Line here in Denver and they advised I remove the rear driveshaft and see if it goes away. Did that, and the issue remains the same, but now it gets much worse when accelerating. At 65, push the pedal down and the vibration gets way worse, let off and it goes back to the previous level.
Had Front Range replace the axle side U joint (they thought it was getting to be that time) and balance it, threw it back in and removed the front drive shaft (could not find confirmation online if 01 Limited T4R uses an ADD or not). Same issue, back to the way it was before (acceleration has no impact, vibration from 55 up).
Should also mention everything was perfect before the lift, and the vibration got somewhat better as the new springs settled (not sure there’s a direct correlation there, but it kinda seemed tied to that).You can feel this in the whole truck, but especially in the steering wheel, and it feels front end-ish to me. What do you guys think? Where do I look next, CV joints in the halfshafts? They did install the diff drop that came with the Boss kit.

Had the exact same issue on mine after my Toytec lift was installed. The 3 inches of lift was too much angle on the CV axles. Lowered the coilovers and completely fixed the issue. Also, hope you dont have stock CV axles.. Both of my boots ripped badly within a month after I installed the lift. Lower ball joints possibly? Had mine replaced with lift.

 

[arsonbear]

Had the exact same issue on mine after my Toytec lift was installed. The 3 inches of lift was too much angle on the CV axles. Lowered the coilovers and completely fixed the issue. Also, hope you dont have stock CV axles.. Both of my boots ripped badly within a month after I installed the lift. Lower ball joints possibly? Had mine replaced with lift.

Yeah I did LBJs too. Still on stock CV axles- expecting to possibly do the CVJremans with the silicone boots- what CV axle did you end up doing? How much did you drop your coilovers? Did you replace rear springs to match?

 

[KaliKid]

Yeah I did LBJs too. Still on stock CV axles- expecting to possibly do the CVJremans with the silicone boots- what CV axle did you end up doing? How much did you drop your coilovers? Did you replace rear springs to match?

What ride height are your toytecs at? All the way up? That would do it.

 

[arsonbear]

What ride height are your toytecs at? All the way up? That would do it.

Supposed to be a 3" lift, of course I didn't measure before so I can't confirm the measurement. Not sure how much room is left on the spring (don't have the truck with me at the moment). I will say the whole thing looks higher than I expected based on other owners' photos. Makes me wish I had gone with some 285s (though I stand by the prudent decision to retain fuel economy with 265s)

 

[SpidermanGeek]

You didn't install a diff drop?

 

[KaliKid]

Supposed to be a 3" lift, of course I didn't measure before so I can't confirm the measurement. Not sure how much room is left on the spring (don't have the truck with me at the moment). I will say the whole thing looks higher than I expected based on other owners' photos. Makes me wish I had gone with some 285s (though I stand by the prudent decision to retain fuel economy with 265s)

Yeah a 3" lift almost needs 285's, been there. But if there arent any threads left on the coil overs, your up to high. Back them off and get that CV angle down.

 

[KaliKid]

You didn't install a diff drop?

"They did install the diff drop that came with the Boss kit."

 

[SpidermanGeek]

Ah.. I see it now.

 

[snivilous]

I assume you balanced your tires and checked all your joints for slop...?

 

[steezemcqueen]

Front could be sitting too high.

Yes its a 3 inch lift but every truck weighs a little different which means the same setting on the coilover will give different heights on different trucks.

Measurement from the center of the hub to fender lip. Stock is 20 inches so you don't want to be over 23.

 

[ExploreMore4Runner]

Going to jump on the 'too-high' band wagon. 3" is just too much for the stock geometry. 2.5" is pretty much the max.

One thing to remember when you are measuring height gain, is that you should compare it to the additional height over stock when the OE suspension was new. Often forgot about factor.

 

[Gadgetguy]

Mine does a little too after alignment. There seems to be just a slight amount of slop in the uca and lca bushings. I'd start tracking all those down. Bushings and u joints all tell a long story when they are put into a stress zone they aren't familiar with. I've been down this road a few times with a few trucks that I lifted.

 

[sport05]

My center of hub to fender is 22.5. I would suggest that. Those CV axles are going to be goners here pretty soon.

I'm pretty sure mine went so quickly because I had it jacked up too high at first. I went with new Napa axles. They are about 100 a pop after core swap.

I have the Toytec 3 in coils in the rear. I wanted level at first but I like the look with the rake

 

[arsonbear]

My center of hub to fender is 22.5. I would suggest that. Those CV axles are going to be goners here pretty soon.

I'm pretty sure mine went so quickly because I had it jacked up too high at first. I went with new Napa axles. They are about 100 a pop after core swap.

I have the Toytec 3 in coils in the rear. I wanted level at first but I like the look with the rake

Are these measurements good with the limited fender flares as well? I'm at about 23 all around, except front passenger side, which is sitting at about 23 3/4".

Regarding bushings- UCAs are new light racing, so should have new bushings, we did LBJs, but not LCAs, so those bushings are something to check from the sound of it.

Current plan of attack is to replace the halfshafts with the CVJremans with the silicone boots, and drop and level the front a half inch or so, to 22.5, assuming that measurement is still correct on a limited fender flare... I don't think I'll mind the rake at 3 in back and 2.5 up front. kind of dumb that toytec markets thsi 3" kit when the consensus is 3" is too much on a 3rd gen

 

[steezemcqueen]

Are these measurements good with the limited fender flares as well? I'm at about 23 all around, except front passenger side, which is sitting at about 23 3/4".

Regarding bushings- UCAs are new light racing, so should have new bushings, we did LBJs, but not LCAs, so those bushings are something to check from the sound of it.

Current plan of attack is to replace the halfshafts with the CVJremans with the silicone boots, and drop and level the front a half inch or so, to 22.5, assuming that measurement is still correct on a limited fender flare... I don't think I'll mind the rake at 3 in back and 2.5 up front. kind of dumb that toytec markets thsi 3" kit when the consensus is 3" is too much on a 3rd gen

3 inches isn't too much. You just dont want to be over 3 inches. Bring that front passenger down and i bet it will ride a lot better.

Limited flares give pretty much the same readings as the regular flares or no flares

 

[sport05]

Yea 23 3/4 way too much. I'd lower it rather quickly. You can damage your coilovers.

I was at 23 and still has issues. I'd go ahead and just plan on 22.5 check it after you drive around. It will settle a little bit.

 

[k2damfc]

Seems like mine sit at 24.5” from center of hub to fender but that’s without adjusting the front coil overs. They should of only given me 2.5” of lift out the box. Also on another note when I did my cv axles I noticed that my driver side almost sat right on the lower control arm when i removed the lbj mounting bolts however I had to use the bottle jack trick on the passenger side. Bad uca? Maybe just bushings are goin? Or is this a lca issue? Also when jacking up the front end right in the middle my driver side tire always comes up first. Idk if that’s replivant but it’s something I noticed.