Strange humming noise after lift

I installed my 3in toyotec coil lift and have noticed humming even after getting an alignment. At about 40mph the hum is at its loudest and is pretty irritating. I did not change tires or anything, just added a lift. What the heck did i do!!?

 

Do you notice any minor vibes? Sounds like you need to install a carrier bearing drop that usually comes with the kit. If it didn't you can get one from toytec.

 

Does it go away if you switch into 4WD?

 

That is the only vibration i really notice. I consider it more of a humming noise tho. But no, my kit did not come with a bearing

 

It isn't a bearing. Its a drop/shim kit. Just a few pieces and a few bolts. Goes on your carrier bearing and drops it to fix your angle towards the rear end.

 

Yes it still makes the noise in 4WD. Did i not tighten everything or what?

 

Exactly which lift did you get? Post a link to the Toytec page. What kind of lift is in the rear? Add-a-leaf?

 

Ok i gotcha. Is it common to have this noise after installing a lift?

 

I'd say it's not uncommon.

This is why I asked about switching into 4WD:

http://www.tacomaworld.com/forum/2n...nt-differential-bearing-vibration-thread.html

 

Yeah. I have a slight one with my truck now. All I had with the old truck was a slight vibe. I notice it more with the auto than I did with the manual.

 

Yes an AAL is in the rear.

heres the link >

 

Get this and install it.

 

Ill get that and post some results. Thanks

 

If the noise is constant, then it's probably not the front diff CV bearing. More likely to be rear driveshaft U-joint angles becoming too severe with the rear 2" lift.

EDIT: Beefed also sells a carrier bearing drop bracket that's more rigid and more aggressive than the OME one: http://stores.streetacos.com/-strse-1/carrier-bearing-driveshaft-vibration/Detail.bok It's also more expensive and built to order (so there's a lead time).