ZF 1304304591 Synchronizer Hub Assembly

The ZF 1304304591 synchronizer hub is a precision-machined transmission component designed for 1st and 2nd gear engagement in ZF 9S1110, 9S1310, 8S140, and 9S109 manual transmissions. Manufactured from case-hardened alloy steel with ground spline profiles, it ensures accurate gear shifting and high wear resistance under heavy-duty commercial vehicle operating conditions. This part replaces OEM references from major European truck manufacturers including Iveco (42532852), MAN (81324200207), Volvo (20853443), and Renault (5001846832). It is interchangeable with ZF part numbers 1324304052 and aftermarket references CEI 157.696 and Tigear 200.04.1010. The hub features integral synchronizer ring contact surfaces and splined bore for mainshaft mounting.