Does anyone know how I can drop my speedometer down 10mph? It is in accurate and need to fix it by dropping it by 10mph. I drive a 1991 firebird. Can I just tweak the speedometer itself or do I need to by a gear with more teeth?

 

gotta change the gear

 

Is it off by 10 mph at all speeds?

 

yeah its off by 10 at all speeds. If I change the gear what do I change it to?

 

Changing the gear won't fix a constant error. You could try carefully pulling the needle off and putting it back on in the right spot.

 

When taking the needle off, I just gently pull it off? I don't have to undo anything?

 

you can use a fork to pry the needle off

 

I don't know, I've never managed to pry hard enough to get a needle off without chickening out for fear of breaking it.