Mine has started to do this on my mk6, My old orion used to do this from what I can remember its to do with the drive or something in the gear box??

 

Any ideas how to sort???

 

Cheers

i had this on me fiesta turbo and was the gearbox bearings so someone told me

but never found out how to sort it!

Mine started doing this when the car was driving through a lot of wet weather to the brighton meet.

 

It settles down around 50mph. Would water play a part in this?

urgh, another bouncy needle topic lol search before asking guys

 

however, cheack the speedo cable isnt lose at both ends,

 

try replacing the cable, it might have a kink or something in it

Where do you find it?

the speedo cable?

Yes...?

one end behind the clocks and the other end next to the gear box

cheers, shall inspect today

mines doing the same thing and i know thats what i need as my old spedo used to work now my new one just bounces lol... drove 15 miles guessing the seed yesterday lol... fitted clocks AM in a rush and did not actually check speedo till i drove off lol... too late by then i ahd work...

mine did this when i was doing a constant 70mph on the motorway, soon as it dropped below 40 it bounced like a bugger pushed the cable back in through the engin bay and checked it was all tight and aint had any problems since

 

the speedo cable is the grey one that runs from the bulkhead into the dash on mine

mine did this when i was doing a constant 70mph on the motorway, soon as it dropped below 40 it bounced like a bugger pushed the cable back in through the engin bay and checked it was all tight and aint had any problems since

 

the speedo cable is the grey one that runs from the bulkhead into the dash on mine

it can also be the diff bearings as mine was its where the drive to the speedo cable is not quite engaging with the other gears..

 

Not an easy job to do either

Merv