The Eaton Fuller K-3158 or K3158 is a washer update kit for RTX and RTXF series 9-speed heavy-duty transmissions. According to Eaton parts manuals, this kit applies to 25 transmission models spanning the RTX-11609, RTX-12609, RTX-13609, RTX-14609, RTXF-11609, RTXF-12609, RTXF-13609, and RTXF-14609 families. The kit includes a mainshaft assembly (S-2688), four washers (4302398), two washers (4303603), four gears (4302962, 4302964, 4303486, 4303487), one M-shaft spl key (4304615), one snap ring (16763), and three technical letters (L-1096, L-1096-1, L-1096-2). Call us to confirm proper fit for your specific transmission serial number.
Features
Fits 25 RTX and RTXF 9-speed transmission models per Eaton parts manuals
Includes mainshaft assembly S-2688 and four mainshaft gears
Six washers (4302398 x4, 4303603 x2) for proper thrust surface updates
M-shaft spl key (4304615) and snap ring (16763) included
Three Eaton technical letters (L-1096, L-1096-1, L-1096-2) included with kit
Applies to both RTX and RTXF 11609 through 14609 model families
