What does the speedometer cable need to work properly in a 1978 Oldsmobile cutlass supreme 350 hydramatic transfer. Fluid is leaking where the cable goes into the transmission?

For the speedometer cable to work properly in a 1978 Oldsmobile Cutlass Supreme with a 350 Hydramatic transmission, it requires a secure connection to the transmission and should be free of kinks or damage. The leaking fluid at the cable's entry point into the transmission suggests that the sealing mechanism, such as an O-ring or gasket, may be worn or damaged. Replacing the worn seals and ensuring the cable is properly seated can resolve the leak and restore functionality to the speedometer. Regular maintenance of the cable and its connections is essential for optimal performance.