Genuine Mazda 3rd Gear SECD – 6-Speed Manual • P610-17-305

Genuine Mazda P610-17-305 3rd Gear SECD – 6-Speed Manual

Replacement Genuine Mazda third-gear secondary component for Mazda MX-5 Mk3.5 and Mk3.75 / NC 2.0L Sport models fitted with the six-speed manual transmission from 2009 to 2015 listed in the compatibility table.

This internal transmission component forms part of the third-gear assembly. It works with the associated third gear, synchroniser and shaft components to transmit drive when third gear is selected.

Accurate dimensions and correct engagement between the internal gear components are essential for quiet operation, reliable gear selection and effective transmission of engine torque through the six-speed gearbox.

This listing supplies one Genuine Mazda 3rd Gear SECD component. One is used in the applicable third-gear assembly.

Replacement may be required where the original component has damaged or worn teeth, excessive contact-pattern wear, scoring, pitting, heat discolouration or dimensional wear discovered during gearbox dismantling. Symptoms prompting inspection may include abnormal noise in third gear, difficult engagement, disengagement under load or metallic debris in the gearbox oil.

• Part type: Third-gear secondary component / 3rd Gear SECD
• Primary use: Forms part of the internal third-gear assembly
• System: Six-speed manual transmission
• Location: Inside the gearbox gear-train assembly
• Vehicle application: Mazda MX-5 Mk3.5 and Mk3.75 / NC
• Engine application: 2.0L LF-VE petrol
• Transmission application: Six-speed manual only
• Model application: 2.0 Sport and equivalent six-speed variants
• Quantity per transmission: One
• Quantity supplied: One component
• Brand: Genuine Mazda
• Part No.: P610-17-305
• Also referenced as: P61017305
• Associated third gear: P601-17-231
• Associated 3rd/4th synchroniser components should be inspected during repair
• Not suitable for: Five-speed manual or automatic transmissions

Fitment advice: This component is restricted to the later 2009-2015 Mazda MX-5 NC six-speed manual gearbox. Confirm the transmission type, production version and removed component number before ordering. Internal gearbox parts should be identified from the transmission assembly rather than engine size alone.

Other items to consider: When changing this part, you may also want to consider purchasing the associated third gear, third/fourth gear synchroniser ring, synchroniser hub and sleeve, selector fork, shaft bearings, retaining clips, locking nuts, oil seals and suitable manual-transmission oil.

Useful tools / consumables: Transmission press, bearing separator and pullers, circlip pliers, shaft-support fixtures, dial indicator, micrometer or vernier measuring equipment, calibrated torque wrench, assembly lubricant and the specified gearbox oil.

Difficulty guide: DIY Difficulty: Specialist. Replacement requires removal and complete dismantling of the manual transmission, pressing components from the gearbox shafts and checking gear, synchroniser, bearing and shaft clearances during reassembly.

Why Genuine Mazda? Genuine Mazda transmission components are manufactured to the intended tooth profile, dimensions, material specification and surface finish. Using the correct OE component helps maintain compatibility with the original gearbox shafts, gears and synchroniser assembly.

What’s in the box: One Genuine Mazda 3rd Gear SECD component, part number P610-17-305. The associated third gear, synchroniser rings, hub, sleeve, bearings, clips and gearbox oil are not included unless specifically shown or stated separately.

Installation notes: Disassemble the transmission in accordance with the appropriate Mazda procedure. Keep all gearbox components in their original order and orientation. Inspect the mating gear teeth, synchroniser surfaces, hub, sleeve, shaft, bearings and selector components before fitting the replacement. Check all specified clearances and end-float measurements, renew single-use retainers and locking components, and refill the completed transmission with the specified grade and quantity of oil.