Honda - Genuine Honda OEM K-Series 3rd–4th Gear Shift Fork Assembly | 24210-PNS-010

Genuine Honda OEM 3rd–4th Gear Shift Fork Assembly, Part Number 24210-PNS-010 

What This Part Is

The Honda 24210-PNS-010 is a genuine OEM 3rd–4th K-series gear shift fork assembly used inside a compatible Honda manual transmission. It is part of the transmission’s internal gear-selection mechanism and is responsible for helping the transmission shift between 3rd gear, neutral, and 4th gear.

The shift fork works with the transmission shift rail, synchronizer assembly, and shift linkage. When the driver moves the gear lever, the shift mechanism moves the fork along the shaft. The fork then pushes or pulls the synchronizer sleeve into the correct position so the selected gear can engage smoothly.

What the Shift Fork Does

Inside a manual transmission, the gears are constantly rotating at different speeds. The shift fork does not directly create the gear ratio; instead, it moves the synchronizer sleeve that locks the selected gear to the transmission shaft.

During a 3rd-to-4th or 4th-to-3rd gear change, the shift fork:

● Receives movement from the transmission shift rail or selector mechanism.

● Moves the synchronizer sleeve toward the selected gear.

● Helps the synchronizer match the speed of the gear and shaft.

● Allows the gear to engage without excessive grinding when the transmission is operating correctly.

● Maintains the synchronizer sleeve in the proper position during operation.

Because 3rd and 4th gears are commonly located on the same synchronizer assembly, one shift fork can control both gear positions. Moving the fork in one direction selects one gear, while moving it in the opposite direction selects the other.

Main Components and Construction

This assembly consists of several integrated parts designed for precise movement inside the transmission:

● Steel shift shaft: Provides the main support and guides the fork’s movement.

● Curved shift fork: Fits around the synchronizer sleeve and transfers movement to it.

● Selector bracket: Connects the fork assembly to the transmission’s internal shift mechanism.

● Machined engagement areas: Allow the assembly to interact correctly with the shift rail and related components.

● Finished contact surfaces: Help maintain proper alignment and reduce unnecessary friction during shifting.

The fork is manufactured with specific dimensions and positioning so that the synchronizer sleeve moves the correct distance. Proper alignment is important because excessive wear, bending, or incorrect installation can prevent the transmission from fully engaging a gear.

Why This Part Is Important

The 3rd–4th gear shift fork plays an important role in manual transmission operation. If the fork is damaged, worn, bent, or incorrectly installed, the transmission may experience problems such as:

● Difficulty selecting 3rd or 4th gear.

● Gear grinding during shifts.

● A gear that will not fully engage.

● The transmission popping out of gear.

● Excessive movement or looseness in the shift lever.

● Noise or abnormal resistance while shifting.

● Incomplete synchronizer engagement.

A worn shift fork can also cause uneven pressure on the synchronizer sleeve, which may contribute to additional wear on the synchronizer components, shift hub, or related transmission parts.

Honda - Gearshift Fork (3-4) 

Vehicle Fitment

• 2002-2006 Acura RSX
• 2006-2011 Honda Civic