1994 s10 blazer

I am having tranny problems its makes a noise when going in drive and overdrive but it runs fine once it goes in them and you can shift them in it manually ' its an automatic ' and it doesn't make a noise can anyone help:banghead:

I suggest you have a professional take a look or listen to it. Check the fluid, hot, in park on flat surface while running.

You need some experience to know what sound is what and to properly smell the tanny fluid and look at it's color.

Is it a 4x4?