1994 Corolla DX
Long answer: The transmission has a VSS that sends an analog electrical signal to the cluster. The speedometer transforms the analog signal to digital to pass on to the ECM.Side questions: is the speedo digital or a cable on these? The previous owner gave me a cable but I was reading that it's digital. Pulled the cluster and def no cable. Am I tripping? How do I fix the inop speedo?
Short answer: For all practical purposes it's "digital" (as opposed to mechanical wire).
First thing to check is if there are any DTCs set, specifically for the VSS. If not, it's likely a capacitor issue with the speedo. There are some threads on this forum for how to fix, you'd have to dig those up (or if someone has those handy they can post a link).