Squeaky sound from rear of truck

I have a bone stock 2009 Prerunner. 75K on. I have a squeaky sound coming from somewhere in the back of the truck. It's seems to be rotational. The faster I go, the higher the frequency and then it stops around 25 miles per hour. It also noticed that it seems to happen more frequently when the truck is accelerating. I could coast at lower speeds and it wouldn't happen. Any ideas? There doesn't seem to be any weird vibrations either. I can't see anything leaking or anything that appears to be mechanically wrong, at least from just looking at it and not taking anything apart. Thanks.

 

Well first, Welcome to Tacomaworld!

Glad you took time to stop by, and ask.
Like many things in life, it's rarely is a simple one answer solution. I'll just share my own experience with my Tacoma. A squeaking occurred in the rear as well, about a year go, pretty suddentoo. Drove me nuts, could not figure it out. Heck, even the stealership and their 99.95$ they extorted from me to just take it into their bay and tell me it was just dirt in between the leaf springs. The stealership service bro said I may have been driving in dirt, said to just power wash it often. Go figure, I drive a TRD Off-Road Tacoma, dirt you say? But long story short, I came across a post here, to check the spare tire, the plate that holds then tire up against the frame may have been the squeak. It was. Good luck finding your culprit. And stop by often, search around the posts.

 

Would start at your spare tire. Take it off an put everything back tight an see if it does it. Or try to move it by hand an see if it makes any noise. If that aint it lube the crap out of your leafs and make sure ubolts are tight. If you think it could be something in the rear diff change fluid and inspect for shavings. Hard to pin point online like others say. Also make sure your bed bolts are tight.

 

Them trd offroads arent made for dirt what are you thinking. Haha

 

Have Toyota buy it back.

 

If its proportional to your speed I'd guess carrier bearing but more likely u joint. I've heard of the spare tire thing also but it wouldn't be speed related. It's worth checking for sure though. My friends f250 did the same thing and it was U joint.

 

Also if your slip yoke has a grease fitting it may not hurt to add some grease if you haven't done it.

 

True, well since I'm sure the Yota service bro mainly sees Camrys, Corollas and Priuses (Priusi?) he assumed Tacomas wouldn't drive on desert trails here in California. Our back yard is pretty much the Mojave Desert...hello McFly! But I digress. Lol

 

My truck developed an ear piercing squeak that is coming from the rear shackle. Try jumping up and down on the rear bumper and see if it reproduces. I thought mine was speed related, but it ended up being the rapid oscillation of the suspension at higher speeds.

 

I would guess it's a u joint. They can go in 75K. IIRC, Prerunners have sealed bearings in the U joints. If it checks out to be those, just have them all replaced with Spicer greasable joints.

Prii

 

Universal Joint for sure. Typical symptoms.

If one is bad replace all three with greasable units. Then grease them after installation until new grease comes out of all four seals, then every oil change.

 

Thanks guys for all the help. I'll take note of your suggestions. Gonna tackle that this weekend and I'll post what I find out.

 

???? So what happened when you tackled it??

 

Leaf springs bouncing

 

but the sound is rotational

 

I second this. My squeak was the spare tire. Drove me crazy, thought I had all these expensive things wrong with my truck. Finally realized it was the spare. Lowered it, cranked it back up tight and it was Gone!