Sending unit

[twood1972]

Good afternoon.
My fuel gauge started acting up last season and progressively got worse. Now it has bounced and jittered so violently that it has jumped the peg. Wiring is proper and no loose ground. I suspect the sending unit is faulty. I haven't removed it yet and was wondering if there are any serviceable parts on it. Basically if it is bad, can I fix it or should I just buy a new one.
Thanks!