To UCA or not to UCA?

I am running this same size tire, 3" lift, with SPC LR uppers. I have 25K miles on this setup with no adverse tire ware. Get new arms, and you will be glad you did. Check out pic with tires.

 

It's not the needle bearing. My needle bearing vibrates, and I feel it all speeds, even 10-15 mph.

 

It only vibrates at high speed under acceleration, when I let off the gas it stops

 

Definitely your rear driveline then. You only feel it accelerating because that's when it's under a heavy load. That can all be fixed with some axle shims and carrier bearing spacers.

https://www.tacomaworld.com/threads/drive-shaft-vibrations-solved-step-by-step.244535/

 

check ujoints in rear drive shaft, mebbe I had a vibe and a squeak, one bad ujoint replaced fixed both

 

At 2.5" and up, I would UCA.

Stocks can get you by for the short term. But having the right UCAs will be best for the long run.

 

My driveshaft bearing is not centered in its rubber bushing, it kind off sits at the bottom of it. But when I asked about it at the dealership they said it was normal.

 

I checked,all u-joints feel rock solid

 

what are your 5100s set to with the 885s? 0??

 

Yep, they're at 0 with no top plate spacers of any kind.

 

One more question, should I do dif drop kit or see what it does first?

 

Most say you won't need it, but it won't hurt the truck either. My truck came with one installed when I bought it and I am having no issues.

 

I second this. The difference is negligible, but it does help a tiny bit. May as well do it.

 

I am not sure. It could be the needle bearing but you will want the carrier bearing drop anyway when doing the lift. I would think the needle bearing would cause vibration at lower speeds if it where that. If you are stock now I assume the vib you currently have is cause by a worn part but if you don't do the carrier drop you will have a new one at lower speed also.

 

I think I might go that route. I'm at 2.5 on my 5100s with factory springs and it's pretty rough..

 

I had an upper ball joint break on my stock uca on my lifted '96 taco (previous truck) in traffic. Thank God no one was in the lane next to me when it happened. It's not pretty. When I got this truck, aftermarket uca's we're an automatic purchase with the lift.

 

So does everyone run the LR UCA'S?ive been thinking about yhe JBA UCA'S on this truck

 

Dont think i want the uniball issues,dont care about the name...just want a good quality replacement for the stock UCA's