Alright I'm still chasing this issue.....i had everything apart this weekend and noticed the cable really has no way for lube or contaminates to get inside it, i removed the plastic connector and tryed to get the nozzle down in the cable but noticed that there was a bushing with a hole no larger than the cable itself, the cable spun freely and seemed fine.....However I'm thinking it could be coming from the Speedo itself, even though i put a new cluster in i used the orgional speedo, since its all mechanical I'm sure a spray of WD40 or some type of lube on the speedo gears themselves may be in order. I have the graphite base spray i was going to use on the cable, would that be alright on the speedo gears? or should i lean towards something more triditional? I know the sound is from right behind the dash and the speedo itself is my last culprit.
Any other info would be great. Thanks!