vibration after toytec boss lift

[Pubrunner]

When I filled the tank put the big toolbox and 2 full coolers in the back it helped. Could this be a pinion angle problem?

 

[Renegade_Medic]

When I filled the tank put the big toolbox and 2 full coolers in the back it helped. Could this be a pinion angle problem?

It is the rearmost U joint, I can practically guarantee it. Mine did the same thing. They get worn in a certain spot where they spend their whole life, until you lift it. Also, loosen the lugnuts and Jack that tire up in the air and torque the lugnuts, in a star pattern, to 85 lb-ft (cant recall the actual torque spec, but that's close). I've noticed torqueing to spec alleviates a lot of vibes on my tacoma and 4Runner.

 

[thezentree]

It is the rearmost U joint, I can practically guarantee it. Mine did the same thing. They get worn in a certain spot where they spend their whole life, until you lift it. Also, loosen the lugnuts and Jack that tire up in the air and torque the lugnuts, in a star pattern, to 85 lb-ft (cant recall the actual torque spec, but that's close). I've noticed torqueing to spec alleviates a lot of vibes on my tacoma and 4Runner.

Could also be pinion angle. Adjustable rear upper links did a lot to reduce (but not fully eliminate) the vibration I have. A new rear U-joint, and then a whole new Tom Woods driveshaft didn't do anything for it.

 

[Pubrunner]

3” Toytec Boss lift

Not much help prying info out of Toytec on this. When I loaded the back down it soothed the vibration a bit. Making me think it was a rear pinion angle thing, but my ‘99 has a double carden at the trans end and should not be the cause. Still trying to figure it out.