speedometer going nuts...

[Junior Knight]

just installed a new cable and now the speedometer is going nuts! speeds up ...slows down...while I'm doin the speed limit...is the speedometer bad? I have another one that works fine, but the mileage will be off..how can I change it to the right mileage? Thanks! 67 ford f100...

[mrollings53]

Sounds like the cable is binding or some gears are missing teeth.

[PhantomoftheBumpside]

Definitely sounds like binding. Either it's got a less than minimum radius bend somewhere that you need to relax by re-routing, or, you kinked it somewhere (usually at the end when hooking up the dash), or the cable is dry and grabby and is asking for a little lube (grease)...

[Junior Knight]

ok..thanks, I'll lube it ..don't think its binding but will ck again...

[Whateverman]

if the needles freakin out and jumping all over its most likely the cable binding,if its not jumping around,check out the speedo gear the teeth can get chewed off if the cable binds up for too long

[mrollings53]

Another one, make sure the exhaust isn't cooking it. I lost one to that.

[michael69]

Be sure to use graphite grease.The others will attract dirt and become thick and gummy and case more problems.

[Whateverman]

Another one, make sure the exhaust isn't cooking it. I lost one to that.

me too

[cowbay]

Another one, make sure the exhaust isn't cooking it. I lost one to that.

me too

X3

[timmytim]

Speedomters seems to be a problem issue with our trucks. I cleaned and greased mine but it still jumped around. So I bought a new one from lmc. A few months later speedometer back to jumping around. I guess there is something good about electronics after all

[72BahamaBlue]

Another one, make sure the exhaust isn't cooking it. I lost one to that.

me too

X3

Yup, me too. X4.

[austin]

i had the same problem turned out to be the speedometer it would squeal really loud too