I Have A 94 Ford Ranger 2 Wheel Drive That Has Started Making A Howling Noise For The First Mile Driving.?

I used to drive Ford Ranger pickups in the era of the same age as yours. If the noise is coming from the back of your pickup, it could be a number of things.
(1)A wheel bearing is shot.
(2)A bearing out in your differential shaft.
(3)Rear end problems
(4)If your truck is a stick shift, check the transmission fluid.
(5)One of your brakes in the back are locking up.
If you could just go underneath with a dolly on some concrete and take a look at things down there for yourself, it might be something that you can fix yourself instead of spending a lot of money at a mechanic shop. Your u-joint bearing may be out.
It sounds to me like the noise could be a loose fan belt but you say the noise is coming from the back.
I like these trucks all except for in the wintertime, the foot speed accelerators like to stick. Hope you can get your truck in good working order!

This is typical. Sounds like the rear end bearings are worn. You can drive it like this for a while, but just take it easy on it. No power shifting or hard launching take-offs, and if it is a clutch, do not ‘drop’ the clutch at all. I had a 80 Mustang that would do the same thing, and drove it for a good 50k miles that way and then sold it. It had 260k on the car by then. You can look into getting it rebuilt, and that will probably run you around $500 for parts and labor, or you can scope out the local wrecking yards, and replace the entire rearend, housing and all and do it yourself in a day for about $75 -$100, but you have to make sure you get the same gear ratio as your current rearend, or you will have to get a new gear for your speedometer.