ZF Friedrichshafen AG 1290204091 Ecolite Synchro Kit

ZF Friedrichshafen AG 1290204091 Ecolite Synchro Kit is a replacement synchronization set for ZF ECOLITE manual transmissions. The part number 1290204091 identifies this kit, which is specified for 3rd and 4th gear synchronization tasks. During gearbox maintenance, worn or damaged synchronizer components can cause reluctance or grinding during shifts, and this kit provides the necessary parts to restore correct engagement in the 3rd and 4th gears within ECOLITE transmissions. Intended for use by technicians in service and overhaul scenarios involving ECOLITE gearboxes, it helps return shifting feel to a more precise alignment with the gear trains. Compatibility is tied to the ECOLITE family and the 3rd–4th gear range as indicated in the listing, making it a targeted solution for rebuilds or repairs of ECOLITE gearboxes that rely on 3rd and 4th gear synchronization. This part is used when replacing worn synchronization components to restore proper gear engagement and shift performance in ECOLITE-equipped vehicles or equipment that rely on ZF manual transmissions.