2000 Toyota Tacoma transmission squeak

My 2000 Toyota Tacoma 5 speed sometimes makes a squeaking noise when I let off the accelerator, most noticeably at speeds of between 25-35mph. If I press on the accelerator, the squeaking stops…it seems like it has to be related to the transmission. I was told it may be the U joint…any thoughts?

Here’s some info about Tacoma u-joints:

Try greasing all the zerks.