Hi, I have a th350 on my 78 cutlass. After a loud bang, it no longer drives forward in any gear, but reverse still works. After doing some research, I believe the problem is the forward clutch. Now my question is, Do I have to remove the pan, valve body etc to get to the forward clutch. Or can i just leave all that intact and start removing the pump assembly etc. I dont want to do a complete rebuild , I just want to fix the problem.