Genuine Mazda 1st / 2nd Gear Selector Fork – 6-Speed • P610-17-402

Genuine Mazda P610-17-402 1st / 2nd Gear Selector Fork

Replacement Genuine Mazda first and second gear selector fork for Mazda MX-5 Mk3.5 and Mk3.75 NC models equipped with the six-speed manual gearbox, together with confirmed Mazda RX-8 six-speed manual applications listed in the compatibility table.

The selector fork is an internal manual-transmission component that moves the first/second-gear synchroniser sleeve when the driver selects either gear. It transfers movement from the gearbox selector mechanism to the synchroniser assembly, allowing first or second gear to engage.

The fork is located inside the six-speed manual gearbox on the first/second-gear selector rail. There is typically one first/second selector fork fitted per gearbox. This listing is for one Genuine Mazda selector fork.

Wear, bending or damage to the fork can contribute to difficult first- or second-gear selection, incomplete gear engagement, the transmission jumping out of gear, internal gearbox noise or abnormal wear around the synchroniser hub and sleeve. The cause of the original gearbox fault should be identified before fitting replacement internal components.

• Part type: First and second gear selector fork
• Primary use: Moves the 1st/2nd-gear synchroniser sleeve during gear selection
• Location: Inside the six-speed manual transmission
• Position: First/second-gear selector rail and synchroniser assembly
• Quantity per vehicle: 1
• Quantity supplied: 1 selector fork
• Brand: Genuine Mazda
• Part No.: P610-17-402
• Also referenced as: P61017402
• Supersedes: P601-17-402
• Fitment note: For confirmed six-speed manual-transmission applications only; not suitable for five-speed manual or automatic gearboxes

Fitment advice: This is an internal gearbox component for the confirmed six-speed manual applications. Before ordering, the gearbox type and existing selector-fork reference should be matched carefully. For imported, modified or previously rebuilt cars, matching the original gearbox identification, selector arrangement and part number is recommended.

Other items to consider: When changing this part, you may also want to consider purchasing the first/second synchroniser hub and sleeve, baulk rings, selector-rail components, detent parts, gearbox bearings, oil seals, casing sealant and fresh manual-transmission oil.

Useful tools / consumables: Transmission jack, workshop press, bearing pullers, circlip pliers, torque wrench, dial indicator, feeler gauges, assembly lubricant, suitable gearbox sealant and manufacturer-specified manual-transmission oil.

Difficulty guide: DIY Difficulty: Advanced. Replacement requires removal and substantial disassembly of the manual gearbox. Internal components must be inspected, measured and reassembled in the correct order with the specified clearances and torque settings. Installation by an experienced transmission specialist is recommended.

Why Genuine Mazda? Genuine Mazda transmission components are designed to match the original six-speed gearbox specification, selector-rail geometry, synchroniser assembly and internal clearances. Correct dimensions, material quality and manufacturing tolerances help maintain accurate gear engagement, geartrain compatibility and reliable shift operation.

What’s in the box: One Genuine Mazda first and second gear selector fork, part number P610-17-402.

Installation notes: Remove and dismantle the gearbox in accordance with the appropriate Mazda workshop procedure. Inspect the selector rail, synchroniser hub and sleeve, baulk rings, engagement teeth and bearings for associated wear or damage. Lubricate internal components during assembly, observe all specified clearances and torque settings, seal the casing correctly and refill the gearbox with the specified transmission oil before operation.