I am replacing the reverse lock out cable on my 66 4-speed shift handle, and have trial assembled and then disassembled the parts about 20 times in the process. The last time I put it together, the spring just disappeared into the handle tube and when you drop the detent piece into the bottom of the handle tube it has no spring tension on it. Must have been a piece up in the tube that the spring seated on - and it fell out? I didn't see any odd pieces around, but I don't even know what I am looking for. Anybody know? And what do I do now???