I have a 1997 mk 3 1.9tdi golf and the speedometer and odometer does not appear to be working. The odometer shows what the mileage is but does not increase as i drive and the speedometer does not go up at all. The rev counter etc all work fine. This is my first golf and i have no clue on what could be wrong, i understand that the mk 3 does not have a speedometer cable so any advise on what could be the problem and how to fix it would be greatly appreciated.

 

the prongs on the back of the guage cluster are loose for the speedometer, i have yet to fix mine but they just aren't having a full conection on the cluster and thats why they won't work

 

I have an 07 jetta i recently bought and after placing my portable gps unit in the car i realized the speedometer is off so i checked the drivers side door frame for the factory size wheels and tires and from the factory it came w/ 255/ 45 r18 and what was on this jetta when i bought it is 255/ 40 R17 i just bought this car and the wheels are vw but 17"
my question is there a way to correct this problem without buying new 18" wheels and new 18" tires?