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Drivetrain› Manual Transmissions and Components

USA Standard Gear

MR5 3rd & 4th Gear Synchro Assembly Kit

Name: MR5 3rd & 4th Gear Synchro Assembly Kit
Brand: USA Standard Gear
SKU: ZMM5R1-2.5A

$134.83

SKU: ZMM5R1-2.5A

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Overview

The USA Standard Gear ZMM5R1-2.5A is a manual transmission synchro assembly kit. It is designed for the MR5 transmission and specifically for the 3rd and 4th gear synchronizer. This kit includes the necessary keys, springs, and blockers for installation.

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The USA Standard Gear ZMM5R1-2.5A is a manual transmission synchro assembly kit designed to replace worn or damaged components in the 3rd and 4th gear synchronizer of the MR5 transmission. This kit is compatible with Ford Ranger/F-150 and Mazda models equipped with the M5R M/T transmission. This assembly includes all the essential parts for a complete repair, featuring the keys, springs, and blockers required to restore proper shifting function. The ZMM5R1-2.5A is engineered to meet stringent OE standards, providing a reliable and durable solution for your vehicle's transmission. It is carefully engineered and inspected for guaranteed performance, ensuring a high standard of quality and durability.

Product descriptions are provided by our supplier partners and may not always be perfectly accurate. Not sure this fits? or call (760) 282-4645 and we’ll verify before you order.

Fitment

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Specifications

Brand	USA Standard Gear
Part Number	ZMM5R1-2.5A
Category	Drivetrain

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Returns & Fitment

Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.

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Shipping

Orders are processed in 1–3 business days. In stock parts ship promptly from our partner network. Special-order items either aren’t currently stocked or are built to your spec — expect 4–6 weeks. If a part goes on backorder while your order is in the queue, we’ll reach out and work through discounted alternatives together.

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