Description

Mitsubishi OEM 5th Gear / Reverse Fork for Evo X — 2578A028

Firstly, Buy Mitsubishi OEM 5th Gear Reverse Fork Evo X 2578A028 online. The Mitsubishi OEM 5th Gear Reverse Fork Evo X 2578A028 is a genuine Mitsubishi factory replacement component designed for the 5-speed manual transmission used in the Mitsubishi Lancer Evolution X. This transmission fork is specifically associated with the 5th and reverse gear shift mechanism and is identified by Mitsubishi part number 2578A028. It is an important internal transmission component for maintaining proper gear selection and reliable manual shifting.

If you are rebuilding, repairing, or refreshing an Evo X 5-speed manual transmission, replacing worn internal shift components with genuine Mitsubishi parts can help maintain the correct factory design and compatibility. The 2578A028 fork is listed in the Mitsubishi manual transmission gearshift control assembly as the “FORK, M/T GEARSHIFT 5TH & REV.”

Mitsubishi OEM 5th Gear Reverse Fork Evo X 2578A028

The Mitsubishi OEM 5th Gear Reverse Fork Evo X 2578A028 is manufactured to fit the original 5-speed manual transmission configuration. It is not a clutch release fork or an external shifter component. Instead, it is part of the internal manual transmission gearshift mechanism.

The fork works as part of the transmission’s shift-control assembly, helping the transmission engage the appropriate 5th or reverse gear selection through the factory shift mechanism. Because it is an internal transmission component, condition and proper fitment are especially important when performing a transmission rebuild or replacing damaged gearshift components.

Genuine Mitsubishi OEM Replacement

Firstly, this is a genuine Mitsubishi OEM transmission part, rather than an aftermarket reproduction. The Mitsubishi catalog identifies part 2578A028 as the 5th and reverse gearshift fork. The component is shown within the Evo X 5-speed manual transmission’s fork-and-rail assembly.

Secondly, using a genuine replacement helps keep the transmission rebuild close to its original factory configuration. This makes the part a practical choice for Evo X owners restoring a transmission, replacing damaged components, or assembling a replacement gearbox.

Thirdly, the fork is supplied as an individual component. Supplier listings specify one 5th Gear/Reverse Fork per purchase.

Product Specifications

• Brand: Mitsubishi
• Product Type: M/T Gearshift 5th & Reverse Fork
• Part Number: 2578A028
• Diagram Number: 23139
• Transmission: 5-Speed Manual
• Vehicle: Mitsubishi Lancer Evolution X
• Chassis: CZ4A
• Model Years: 2008–2015
• Quantity: 1 fork
• OEM Status: Genuine Mitsubishi OEM
• Application: 5th and reverse gearshift mechanism

Mitsubishi’s parts catalog places 2578A028 within the 5-Speed Fork & Rail gearshift control assembly, alongside the 1st/2nd and 3rd/4th gear forks and the corresponding transmission rails.

Evo X 5-Speed Manual Transmission Application

This Mitsubishi OEM 5th and reverse fork is intended for the 5-speed manual transmission-equipped Mitsubishi Lancer Evolution X. It is particularly relevant when servicing the internal gearshift mechanism during a transmission rebuild.

The Evo X manual gearbox contains several forks and rails that control different gear selections. The 2578A028 is specifically designated for the 5th and reverse gear positions, making it different from the 1st/2nd and 3rd/4th gearshift forks.

For customers rebuilding an Evo X transmission, it is important to identify the correct fork before ordering. The Evo X was offered with different transmission configurations, so this component should not be confused with parts used in the MR TC-SST transmission.

When Should You Replace the 2578A028 Fork?

A transmission rebuild is a good opportunity to inspect the gearshift forks for wear, damage, distortion, or other signs of stress. A damaged or worn fork can affect the operation of the corresponding gear-selection mechanism.

Consider replacing the fork when:

• The original fork is damaged.
• The transmission has experienced internal mechanical failure.
• The gearbox is being completely rebuilt.
• There is visible wear on the fork or its contact areas.
• A previously damaged 5th or reverse gear mechanism requires replacement components.
• You are restoring a used Evo X transmission to factory specification.

Replacing individual internal components during a transmission rebuild can help avoid reinstalling known damaged or questionable parts.

Designed for Evo X Manual Transmission Repairs

The Mitsubishi OEM 5th Gear Reverse Fork Evo X 2578A028 is especially useful for enthusiasts and professional transmission builders working on Evo X 5-speed gearboxes. It can be used alongside other genuine Mitsubishi transmission components when rebuilding the gearshift assembly.

Related components may include transmission rails, gearshift forks, synchronizer components, bearings, seals, gears, shift cables, and other internal gearbox hardware. Always inspect the complete transmission assembly rather than replacing only one component without checking the surrounding parts.

OEM Part Number 2578A028

When ordering, use 2578A028 as the primary Mitsubishi part number. Some aftermarket and supplier references also show 2578A026 as an alternate reference, but exact interchangeability should be confirmed against the vehicle’s VIN and transmission configuration before substituting one part number for another.

Correct identification is particularly important with Evo X transmission components because different gearbox configurations and internal assemblies can use different components.

Buy Mitsubishi OEM 5th Gear Reverse Fork Evo X 2578A028 Online

If you are searching for a genuine replacement 5th Gear / Reverse Fork for an Evo X 5-speed manual transmission, the Mitsubishi 2578A028 is a direct factory-style replacement component for the specified application. It is suitable for transmission repairs, gearbox rebuilds, restoration projects, and replacement of damaged internal gearshift components.

Before ordering, verify that your vehicle is equipped with the 5-speed manual transmission and confirm compatibility using your VIN or transmission information. Supplier catalogs specifically identify the part for the 2008–2015 Evo X application.

Frequently Asked Questions

What is Mitsubishi part 2578A028?

Mitsubishi 2578A028 is the OEM M/T Gearshift 5th & Reverse Fork used in the Evo X 5-speed manual transmission.

Does 2578A028 fit the Evo X MR?

The 2578A028 is associated with the Evo X 5-speed manual transmission. The Evo X MR uses the TC-SST transmission, so this fork should not be assumed to fit the MR SST gearbox.

How many forks are included?

The part is sold as one 5th Gear/Reverse Fork.

What is the OEM part number?

The genuine Mitsubishi part number is 2578A028.

What years does it fit?

The commonly listed application is 2008–2015 Mitsubishi Lancer Evolution X/CZ4A with the 5-speed manual transmission. Always verify fitment using your VIN before ordering.

Is 2578A028 an aftermarket part?

No. It is listed as a genuine Mitsubishi OEM factory replacement part. For Evo X owners rebuilding or repairing a 5-speed manual gearbox, the Mitsubishi OEM 5th Gear Reverse Fork Evo X 2578A028 provides the correct factory-design replacement for the 5th and reverse gearshift mechanism, so shop and order your genuine Mitsubishi Evo transmission parts from evomotorparts.com and keep your Evolution X drivetrain built with the components designed for its original manual transmission.