The Eaton Fuller 4300976 is a 3-sided mainshaft key used in the mainshaft assembly of select RTO and RTOF series manual transmissions. Per the manufacturer's illustrated parts list, this key must be used with matching washers K-2489 and K-2746. Confirmed fitment in seven Eaton Fuller models: RTO-11707DLL, RTO-11707LL, RTO-13707DLL, RTO-13707MLL, RTOF-11707LL, RTOF-13707DLL, and RTOF-13707MLL. Cross-referenced as 3134981, 4300976-SP, and F2HZ7B220C, among others. Call us to confirm proper fit for your specific transmission build.
Features
3-sided key design for mainshaft assembly
Fitment confirmed in RTO-11707DLL, RTO-11707LL, RTO-13707DLL, RTO-13707MLL, RTOF-11707LL, RTOF-13707DLL, and RTOF-13707MLL
Must be installed with matching washers K-2489 and K-2746
Cross-references include 3134981, 4300976-SP, and F2HZ7B220C
Genuine Eaton Fuller part sold by Pro Gear and Transmission
Tech Specs
- Part Number: 4300976
- Alternate References: 3134981, 4300976-SP or 4300976SP, F2HZ7B220C, 3088-4300976 or 30884300976
- Key Type: 3-Sided
- Assembly Group: Mainshaft Assembly
- Required Matching Washers: K-2489, K-2746
- Fitment: RTO-11707DLL, RTO-11707LL, RTO-13707DLL, RTO-13707MLL, RTOF-11707LL, RTOF-13707DLL, RTOF-13707MLL
Used in these Eaton Fuller models
