Eaton/Fuller RT6610, Transmission Assys, (REBUILT/Watch Internal Video) Eaton/Fuller RT6610 Transmission For Sale, 10 Speed Transmission, Part # E7HT7003JA, Roadranger Twin Countershaft, 650 lbs-ft Nominal Torque, Multi-mesh Gearing, $2750 + $750 Core Charge or $3,500 Outright, Serial # 70521397, Stock # 8128 | Tested & Inspected!