Erratic fuel guage

[DARRELL1953]

Last two times i topped off with fuel, the fuel guage swings back and forth from full to 2/3 of a tank. Just started doing this however, it settles in on accurate reading after 50 or so miles.bad sending unit? Is sending unit accesible? 06 ts select 35000 mi.

[slabman]

Mine started doing that at about the same mileage, but I didn't get around to putting in a new sender. I jiggled the wiring at the sender and it cleared up and reads correctly again. And yes, the sender is accessible on the side of the tank as I remember. But call Spartan and they can help you.