Speedo or cable issue?

[79BIG10]

I've been trying to get the speedo cable in my truck working again for sometime. I had to do some wiring behind the bezel awhile back and when I reattached the cable and drove it it made a awful whinning sound. I think it's getting in a bind because my speedo (Autometer) is making me look like I'm driving 130 while doing 40. I've moved the cable many times. I'm stumped on this one and wondering if the gearing in the speedo is messed up? I've even tried spaying white lithium in the cable from the speedo inlet down with no luck still. Somethings not right and about to pull my hair out. I can't see how much MPG I'm getting and it's driving me nuts.