About 4 years ago my brother and I purchased a 2255 from Worthington that was going to be parted out.  The previous owner indcated something was wrong with the rear end and did not want to spend any money fixing it.  We bought it and it sat until last fall when we decided to have it looked at.  The mechanic called today he has it running and moving.  the problem was a bent fork in the transmission.  However, the over/under does not shift.  He is more of a Case guy than Oliver and was wondering if the tractor sitting for quite some time might  have something to do with the unit not shifting.  He put new oil in the unit. and is pretty sure it is pumping.  Is there anything he can do to check out the unit before we have him pull the engine and over/under?