I have 2 case 580 super L s One we had tranny out about a yr ago and resealed clutch packs and replaced control valve . After that it was slow to shift from forward to reverse. And reverse to forward. About 5 seconds. Has Gotten worse. About 30 seconds. Have checked pressures. Main pressure good. Forward and reverse pressure good when engages. Second machine same problem haven't been into that tranny. Any suggestions?
It was the suction screen.
Good to here you found it