Hey there,
I have a 2001 Ranger 2wd w/manual transmission and when I'm coasting at low speeds in neutral I noticed there is a ticking/clicking noise coming from under the vehicle. If i disengage the clutch the noise is still there. I'm guessing it's coming from something behind the transmission. Maybe a u-joint or the rear-end. Any ideas? Thanks!

 

ChecK for something simple like rocks in ur tread, which will make a clicking noise during low speed coasting. Prolly not something so easy, but it wouldn't hurt to check before u go tearing into the truck!

 

Did you solve the problem? I'm having the same issue.
It almost sounds like a wet shoe on a gym floor creaking. I'm thinking it might be rear bearings.
With the window down driving in town so it can echo off of the buildings, the noise slows to a clicking just before the truck stops moving.
Neutral or breaking doesn't make a difference and it goes away when I accelerate. It's only there when I'm coasting or at speed.

 

Turned out to be loose wheel nuts.]

I did my breaks a few weeks earlier and used an impact to take the nuts off, and I thought I used the impact to put them back on, but they were not tight enough.

 

I currently have a similar problem it sounds like the same thing is going on with my manual 94 3.0 v6 it starts usually in second and third gear and goes away usually in 4th , it doesn't go away slowing down in neutral and braking doesn't seem to help either I have no idea what it is any ideas guys