The 66 Factory Shop Manual has a comprehensive section on all the transmissions, troubleshooting, adjustments for clutch and shifting linkages, etc - way more than could be covered in this thread! MyMopars has quite a few of the FSMs available for download - maybe the 66 is among them.
Thanks Dartman! I have a factory service manual on the way! I looked at MyMopars FSM's and downloaded it too. Really appreciate all your help! This is a great forum and everyone so helpful!
