new to the site and little help needed

[derekb]

Hello all. Short story...about 31 years ago I bought my fist vehicle which was a 72 Chevy LWB (couldn't find a SWB) which I rebuilt from the ground up. 29 years later I still miss that truck and decided that I wanted to find a project that I can spend some time on and came across a 72 SWB which I bought. 250 cid, 3 speed tranny. Been doing much of the mechanial stuff myself but I am somewhat limited on my "knowledge". Thank goodness for manuals and the internet. Here is the question...3 speed tranny moved to floor by former owner. It has been on the road with tranny working fine but now if I try to put it in any gear and let out the clutch, it only wants to move forward and it seems to be straining like something is stopping it. This happens in reverse, 1st, 2nd and 3rd. I haave researched everywhere and am at a loss. Any ideas? And since I am new to the sight I hope that I posted this in the right area. If not let me know.