Speedometer Gear Wearing Out After 50 Miles

[El Kabong]

Is it cable replacement time if the speedo bounces a lot? for example the needle goes up and down 30mph to 40-45mph driving at a constant speed

That can be cable related. But a lot of times lubing the inner cable can fix it.

 

[Speedrdr]

Is it cable replacement time if the speedo bounces a lot? for example the needle goes up and down 30mph to 40-45mph driving at a constant speed

Maybe, maybe not. Have you tried lubing the cable yet? It may be that simple of a fix.

Randy

 

[77BroncoWag]

Maybe, maybe not. Have you tried lubing the cable yet? It may be that simple of a fix.

Randy

graphite I assume?

 

[DirtDonk]

Often times yes. But it's not the only thing that can make a speedo needle do that.
In no particular order:
1. Cable dry and needs lube.
2. Cable frayed and needs to be replaced.
3. Driven gear in the t-case/trans worn out.
3a. Hopefully the driven gear, because the drive gear is more of a pain to replace!
4. Speedo cable not attached to the speedometer correcty.
5. Speedometer itself is failing due to either needing lube, needing adjustment, or something broken.

So yes, it might be time to replace the cable. But unfortunately it's not the only possible fix, so you might need to do a little more digging.
Just don't assume just yet. Wait until after a couple of tests.

paul

 

[DirtDonk]

Interesting. Did not see Speedrdr's post or yours or any of the other followup replies until just now. Sorry for the duplicate effort.

Paul