Squealling noise

Hi,
I have a used '99 Tacoma prerunner. There is a pretty loud squealing noise coming from the rear passenger side. It seems to only happen when I'm going about 60 mph. Every once in awhile it happens about 30-40 mph. This noise is getting worse, I've taken it to the mechanic and he said he can't find or hear a noise. It kind of sounds like a really really loud cricket. I'm not very confident in this guy but he's the mechanic the dealer where I bought the truck, uses. I know this description isn't the best but it's kind of hard to describe. Anyone have any similar problems? I've done a little research online and from other people's posts, it seems maybe the rear u-joint? Any other possibilities?
Any suggestions or tips would be very much appreciated. Thanks in advance.
Jon

I had the same problem. There is a hidden alimite in the U-joint. The joint closest to the tranny...u will need a needle fitting for you grease gun.

[brayboy]

crazyhorse3030 has a legit claim. Are you running with both windows down or is this sound coming from the interior? The A/C fan can make this 'cricket noise' but it's on the passenger-side behind the glove box area. Bray [img]/ubbthreads/images/graemlins/40BEER.gif[/img]

Hi,
Thanks for your response. I am hearing the noise with the windows down and up. The noise seems to be more towards the rear, or right behind the passenger seat, but definately underneath. I think the post before, about the "alimite"? sounds more like it might be the problem. Thanks
Jon

[bowyer2002]

This was done on my '01 4x4 Tacoma Double cab but the rear driveline should be the same for a pre runner.

I had a similar noise in my driveline when it was cold, below 30 F. It almost drove me crazy!! I greased the U-joints and even removed the carrier bearing (between the transfer case and rear diff)that supports the rear drive shaft to check if it needed replacing. Finally I unbolted the drive shaft from the rear differential flange as well as the next forward flange (at the carrier bearing) While this was out I put a light coating of grease on each flange face, re-installed the drive shaft and haven't heard a squeak since. Just my experience with a similar sounding problem. It only took about 20min to grease the flanges.

[haireball]

yeah that one grease fitting in the center of the driveshaft, i have to remove the bolt every time just to grease it.

[bowyer2002]

I forgot to mention that I also greased the slip-yoke. But I still had a squeaking squalling noise until I greased the flange face. It never can have too much grease! That is until it slings all over the place!! [img]/ubbthreads/images/graemlins/40BEER.gif[/img]