75' gauges in an 81'.

[327power]

Ok...I have an 81' C10 that has a very noisy speedometer. I got a instrument cluster from a 75' C20, but it has a mechanical oil gauge. Can I still use any of it? Thanks.

[slammed79]

You can swap the speedos without any issue based far as I know. I'm sure if I'm wrong someone will chime in.

[78 Chevyrado]

Dont use the AMP guage from the older truck or there'll be smoke and flames.

[Captkaos]

The actual speedo gauge is making noise or the cable going to it?

[1980c10]

My bet also would be the cable if you haven't ruled it out. If it is just take it out and lube it.

[327power]

Yeah, it seems to be coming from the speedometer. While driving, if I put my finger on the speedometer I can actually feel the vibration. Super annoying.

[slammed79]

Still could be the cable, try lubing it first, they like it periodically

[1980c10]

Mine was the same, lubed the cable, now nice and quiet.

[Captkaos]

Its' the cable.  There is nothing in the gauge that will make that much racket.

[327power]

It appears to be a 2 piece speedo cable...should I replace the whole thing? It also leaks from the cable connection at the transmission. Just so you know. Thanks!

[Captkaos]

Pull it out and look at it.  If it is dry you need to lube it.  If it is frayed, you need to replace it.

[327power]

Well, I pulled out the cable a couple days ago and apparently it was loose at the speedometer. I bought a crappy "replacement" cable from a chainstore and it doesn't work 'cause it has a threaded connection that is supposed to fit the gauge. Of course it is a slip on so it won't work.
I going to just put on the old one and see if it stays on the speedometer tight enough that it won't loosen up. I think that is why it was noisy in the first place. Thanks!
 

[Captkaos]

I think you can still get the actual inner cable from NAPA.