I have no noise at all in my truck until I put it into gear (usually 1st) and accelerate. I have a 84 Ford F250 with a 460, and a t19 with a new clutch, pilot, pp, and throwout bearing, new slave, new master, and new clutch hose. I am kind of worried about my trans giving up the ghost. But I changed the fluid a little while ago, few weeks I'd say. I found no metal shavings or any water. I also have no problems shifting it is just a noise, hard to say exactly but its not a grinding noise or anything. If necessary for diagnosing I will take a video, but I just hoped that low gears may cause something like this...4.10 gears if it matters.

 

T-19 is an old school tranny, so yeah i's going to have some gear noise. Combine that with the T-case and rear axle there is going to be some whine. I would suggest driving it for a while and see if you notice any significant change that would indicate a problem.

 

Ok great was what I was hoping to hear.

 

It's normal for 4th to be quiet, especially if 2wd, because no gears are transmitting drive in 4th.......there is just a locked shaft right through, direct from clutch to driveshaft

In the other speeds, the drive is being transmitted by gears, so you get natural gear-tooth whine, especially in 1st & reverse, but also 2nd & 3rd.

Worn bearings will also make noise, but different to gear-whine......more like a rough whirring.