My 1986 manual transmission is a little noisy in all gears except 4th. 4th is nice and quiet, I only hear the motor hum... In all the other gears it sounds a little whiney or slushy but easy to get used to and tune out. It shifts into and holds every gear just fine. Is this fairly normal for a truck with almost 200k miles? I just rebuilt the motor myself last year and used a new clutch kit and throw out bearing so I'm pretty sure it's the tranny. I took it to a local shop that has a good reputation and he said I ought to go ahead and rebuild it before it gets worse. He said it could be simple and cost as little as $400 but probably $1k to $1800 if he has to fully rebuild it... and that's with me pulling/ installing the transmission myself. I'd love to hear any and all advice or experience from fellow Ram 50 enthusiasts, thanks in advance!!