Strange Squeak

Dont know where to post this but my 2003 prerunner is making a very strange squeaking noise and was wondering if any of yall could help me out... Ive noticed a few things about it.
-it seems to be coming from the middle of my truck, driveshaft area
- only when im driving, and only accelerating till about 45-50, then it stops
- it sounds somewhat like a loose belt, but louder and from under the middle of the truck
-it seems to be happening on colder days
- it stops squeaking when i let off the gas

any suggestions? solutions?

 

see my thread on Carrier Bearing, I am about to post my solution for the same symptom. Turning up the music wasn't enough.

Short answer, check and grease the U-joints.

Let me know how it turns out.

 

Does it happen while the truck is idling? if it does, then you can put it on stands and investigate while its running. Sounds like something needs to be lubed, and when the truck reaches a high enough speed the heat and speed of what ever it is counter acts the noise created by the unlubed part.

Sorry but thats all I can offer from what you have.

 

OH! also describe the squeak is it a cycling squeak like E-E-E-E-E-E....
or is it constant like EEEEEEEEEE. theres a big difference and will help isolate the problem.

 

i just fixed my squeaks today the start up squeak came from belts now new and adjusted and then i had a squeak when i was driving (like yours) and it was solved by thoroughly lubing the U joints on the drive shaft

hope this helps

 

Lube the u joints and drive shaft spline. Guaranteed to fix er up.

 

Noob here as well.. so just attach the grease gun to the zerk and squeeze away? Until the old grease gets squeezed and we start seeing new grease?

I assume the zerks under my truck are all rusted and/or dirty.. unless we clean it up EXTREMELY well, aren't we injecting unwanted elements into the part itself?

For the ujoints where the zerk is at an unreachable angle, how do we turn the drive haft? pop it in neutural and push the truck a bit?