The Eaton Fuller K-3579 or K3579 Lightning Update Kit is a factory-assembled gear update kit for the FRLO-16410C-T2, FRLOF-16410C-T2, and FRLOF-16410C manual transmissions. Sourced directly from Eaton's illustrated parts list under both the Mainshaft Assembly and Shift Shaft Assembly groups, this kit covers 3rd and Direct gears between specified serial numbers. The kit includes five components: two mainshaft gears (part numbers 4304263 and 4304280), a main drive gear (4304266), a sliding clutch (4304267), and a yoke (4304265). It supersedes earlier individual parts 4304120 and 4304162. Call us to confirm proper fitment for your serial number range before ordering.
Features
Fits Eaton Fuller FRLO-16410C-T2, FRLOF-16410C-T2, and FRLOF-16410C transmissions
Covers 3rd and Direct gear positions between specified serial numbers
Kit includes: mainshaft gear 4304263, mainshaft gear 4304280, main drive gear 4304266, sliding clutch 4304267, and yoke 4304265
Supersedes Eaton part numbers 4304120 and 4304162
Also referenced as HFK-3579 in aftermarket catalogs
Sold as a complete five-piece update kit
