80-81 Shovelhead 4-Speed Transmission MAIN DRIVE GEAR SEAL KIT 37741-67 U.S.A. | eBay
V-Twin Mfg. 4-Speed Mainshaft Spacer And Seal Kit For Harley FL FX EL UL 1937-1976 | JPCycles.com
Crankshaft Main Seal Installer for Harley Davidson Shovelhead! - Kollies Parts
Hunting Harley's, 4 speed transmission seal part 1 - YouTube
TRANSMISSION GEARS & SHAFTS FOR 4-SPEED BIG TWIN - Z...
Hunting Harley's, 4 speed transmission seal part 2 - YouTube
Amazon.com: Belt Drive Super Nut with Seal for Harley Big Twin 4-Speed 1936-1980 EL/UL/FL/FX Knucklehead, Panhead, Shovelhead Models – For main drive gear bushing wear - Replaces HD# 35211-36 : Automotive
James Gasket Transmission Main Shaft O-Ring Quad Seal For Harley Big Twin 1984-2006 - RevZilla
Shovelhead Panhead 4-Speed Transmission Main Gear Double Lip Seal 35230-36 (823) | eBay
Transmission Mainshaft Spacer and Seal Kit for Harley FL FX Shovelhead 1977-1979 | eBay
82-84 Shovelhead 4-Speed Transmission MAIN DRIVE GEAR SEAL KIT 37741-82 U.S.A. | eBay