Ok, so, since I purchsed this truck there have been speedometer issues and I never cared about it since I used a GPS anyways. Here is my issue.

My speedometer always reads way slower than what I am going. It doesnt bounce around, but it isnt linear either. Sometimes itll read 10 when Im doing 60 and sometimes itll read 30 when Im doing 60. Another thing is the longer I drive, the higher the speedo will read. So on the start of the trip itll read 20 @ 60 and then 100 miles down the road it will climb up to 30ish, Well, the last few times I drove it before I shipped it off, it barely read a speed at all. Also, the odometer works perfect and is dead accurate. The Cruise Control also works just fine.

I wouldnt worry about it, but apparently over here in the UK, they will not pass its MOT unless the speedo is functional.

I have searched the forums and google with no luck to anyone with this same issue. Im assuming its an issue with the speedo itself.

Truck is a 1993 D350 Ext-Cab dually w/5Spd

If anyone has an operational speedo they are willing ot sale, that would be awesome too....lol