speedo having a fit

[Colby844]

Gidday guys i have just replaced my VK speedo and was wondering if anyone knows of this prob. it go's up to 50kph perfectly then starts to jump around like from 50 to 80 to 60 to 50 to 80 and on and on it cant keep still and gets worse the faster i go until yeh im doin 50 or below then its all happy again!! the old speedo worked fine (this ones the segmented cop job i just like the look of better) also does anyone know if these need additional power supply or somethin cause there is a spot with prongs for a socket on the back of the speedo- the stock speedo just has this blank but hole is there for it as in the pic.. or is the speedo shaft maybe slipping or something? thanks heaps for any help

[Tom_1569]

Make sure the cable is clipped right onto the speedo. Are you using the same cable?

Also if its a fualty speedo, you can get them reco'd (about 90 bux) or you can swap the faces over from memory.

[Amped]

could also be missing teeth off the gears

[leigh 7005]

also check your speedo cable as mine dose this and it has melted on the exhaust.

[Colby844]

thanks yep its the same cable but it has melted on the exhaust before bad before i got to it.. i will get on to it in the next few days when i get a moment and change the cable etc and yeh maybe get someone to change the face over if needed (i cringe at the idea of pulling that needle off).. this forum is keeping me sane normally id be at work thinkin overtime bout this sorta stuff now i find it relaxing- all cool thanks everyone!

[Colby844]

Ok yep bought new cable for 80 bucks sprint auto parts.. holden guy says part number "obsolete" he gos geez you'd be lucky to find something anywhere for a car as "ancient" as a VK- what a date hole!!!! anyhow fixed the problem but now it appears to be about 5k's an hour out its doin 50 somethin but reading 60 so guessin i better look into those colored gears.. thanks again everyone..

[philbio]

Ok yep bought new cable for 80 bucks sprint auto parts.. holden guy says part number "obsolete" he gos geez you'd be lucky to find something anywhere for a car as "ancient" as a VK- what a date hole!!!! anyhow fixed the problem but now it appears to be about 5k's an hour out its doin 50 somethin but reading 60 so guessin i better look into those colored gears.. thanks again everyone..

Yeah some people just have no respect for these cars. When I drive passed a nice straight VB-VK I say to my wife "look there honey, another beauty".

Rare spares stock the plastic gear for the transmission end of the cable for about $18.