How difficult is it to change the input shaft bearing on a 1970 a-844 trans I've never taken one apart before? This trans was in a friends car and he said it worked and shifted perfectly but was starting to hum in front and he recommended I put an input shaft bearing in it before I install it in my car. I am pretty mechanical and am sure I can do it but I'm just wondering if the whole thing needs to come apart or is it as simple as just removing the front bearing retainer? Or should I just drop it off and have completely gone through by a reputable shop? What's the going rate for a complete overhaul these days?
