The Eaton Fuller Rear Bearing Cover Assembly, part number S-2257 or S2257, is a genuine OEM component for the auxiliary case section of Eaton Fuller RTO and RTAO series transmissions. This assembly is listed in the illustrated parts manuals for eight transmission models: RTAO-11710B-AC, RTAO-11710C-AC, RTAO-12710B-AC, RTAO-12710C-AC, RTAO-13710B-AC, RTAO-13710C-AC, RTO-10710B-AS2, and RTO-12710B-AS2. It carries a supersession reference of 4302556. Associated components in those same manuals include a magnetic plug (20224) and a sensor seal (4301954), both seated within this cover assembly. Call us to confirm proper fit for your transmission build.
Features
Genuine Eaton Fuller OEM rear bearing cover assembly
Part number S-2257 or S2257; supersedes 4302556
Positioned in the auxiliary case (CASE AUX) section of applicable transmissions
Fits eight RTO and RTAO model variants including RTAO-11710B-AC and RTO-10710B-AS2
Compatible magnetic plug (20224) and sensor seal (4301954) are separate auxiliary case components seated at this cover
