Transmission Second Shaft Sliding Sleeve (Double Groove)
The specific part number for this component is 16118.

1. Part Name & Function

• Name: Second Shaft Sliding Sleeve (Double Groove) / Spline Engagement Sleeve

• Main Function: This is a key sliding component that enables gear shifting inside the transmission. It is mounted on the transmission's second shaft (typically the output shaft or countershaft). By sliding axially to engage with different gears, it changes the gear ratio, allowing the vehicle to shift gears (change speed). The "double groove" design is typically used to match specific shift fork structures or locking mechanisms, ensuring smooth and reliable shifting.

2. Applicable Vehicle Models & Transmission Types

This type of sliding sleeve is widely used and primarily fits the following series of heavy-duty truck transmissions:

• Fast Gear (FAST): 9-speed transmissions (e.g., 9JS135, 9JS119), 8-speed transmissions (e.g., 8JS118, 8JS100)

• Fuller: 9-speed series, 10-speed series (e.g., RT11509C, RT-11710B)

Applicable Heavy-Duty Trucks: Widely used in mainstream heavy-duty truck models including Sinotruk, Shacman (Shaanxi Delong), Auman (Foton Auman), Dongfeng Tianlong, and others.