The Stovebolt Site Forums The Shop Area Driveline Spedometer cable R&R questions 55 C3100, manual trans, 235

Hey all,
Thanks for the suggestions - I have a new related question now - I was taking a closer look at the transmission end of the cable, and to my surprise, the spedo cable does not go directly into the transmission housing but goes to another unit in line that also has same type of connector (knurled thread ring) to the rear of the tranny housing. Perhaps it is some kind of adapter to get cable rpm correct for the 1/2 ton? Does this sound familiar to any of you? - Also, I have noticed several spedo calbes listed for my truck, with the shortest being listed as 63" (might have been 68" - don't quite remember) - anyone know the correct length? ( 1955 C3100, 235 inline 6, std 3 speed trans) - I am at a bit of a pause here. I sure hope it is only the cable - I also examined the possibility it is the spedo gauge itself that has ceased to function - Only thing I can find are more modern replacement sets for 600-800 bucks ( although that is a complete 2 gauge set with all new senders that theoretically fit in the existing dash holes)