Honda K-Series Differential Speedo Gear
Part Number: 41312-PPP-000

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Product Details

The Honda OEM Differential Speedometer Drive Gear is a genuine factory replacement designed for select Honda K-Series manual transmissions, including the 2002-2004 Acura RSX and 2002-2005 Honda Civic Si (EP3).

This gear mounts to the differential inside the transmission and works with the vehicle speed sensor (VSS) to provide accurate vehicle speed information to the ECU and instrument cluster.

A properly functioning speedometer drive gear is essential for maintaining reliable speedometer operation. Over time, the original gear can become damaged or worn, particularly during transmission failures, differential repairs, or improper assembly. A damaged gear may contribute to inaccurate speed readings, an erratic speedometer, or a complete loss of vehicle speed signal.

Manufactured to Honda's original equipment specifications, this speedometer drive gear provides factory-quality fitment and dependable operation. It is an excellent replacement during K-Series transmission rebuilds, differential upgrades, and compatible engine swaps.

Features

Genuine Honda OEM Part: Manufactured to Honda's original factory specifications.
Differential-Mounted Speedometer Gear: Installs inside the transmission on the differential assembly.
Vehicle Speed Sensor Operation: Works with the factory VSS to provide vehicle speed information.
Accurate Speedometer Function: Helps maintain reliable speed readings when paired with a properly functioning speed sensor.
K-Series Transmission Compatibility: Designed for select K20A2 and K20A3 manual transmissions.
Direct Factory Replacement: Replaces the original speedometer drive gear on compatible transmissions.
Ideal for Transmission Rebuilds: Excellent for replacing a damaged gear during differential or transmission repairs.
OEM Part Number: 41312-PPP-000.

Additional Information

Manufacturer: Honda / Acura
Part Number: 41312-PPP-000
OEM Description: Gear, Speedometer Drive
Other Names: Differential Speedometer Gear / Speedo Drive Gear / VSS Drive Gear
Product Type: Manual Transmission Speedometer Drive Gear
Compatible Transmissions: Select K20A2 / K20A3 Manual Transmissions
Installation Location: Inside Transmission, Mounted to Differential Assembly
Quantity: Sold Individually (1 Gear)

Installation Notes

Installation requires access to the differential assembly inside the manual transmission. This part is typically replaced during a transmission rebuild, differential repair, or limited-slip differential installation.
Before installation, inspect the original speedometer drive gear, differential mounting area, and mating speed sensor drive components for wear or damage.
Install the replacement gear according to Honda's factory service manual, ensuring it is correctly positioned and secured to the differential.
After reassembling the transmission, refill it with the appropriate manual transmission fluid and verify proper vehicle speed sensor and speedometer operation.

Note:

Includes one genuine Honda differential speedometer drive gear. Differential assemblies, vehicle speed sensors, bearings, transmission seals, and additional installation components are sold separately.

For aftermarket limited-slip differentials or K-Series transmission swaps, confirm that your differential supports the factory speedometer drive gear before ordering.

Part Number:	41312-PPP-000
Brand:	Honda

WARNING: This product may contain chemicals known to the State of California to cause cancer or birth defects. www.P65Warnings.ca.gov.

Vehicle Fitment

Year	Make	Model	Trim
2002	Acura	RSX	Base
2002	Acura	RSX	Type-S
2003	Acura	RSX	Base
2003	Acura	RSX	Type-S
2004	Acura	RSX	Base
2004	Acura	RSX	Type-S
2004	Honda	Civic	Si
2005	Acura	RSX	Base
2005	Acura	RSX	Type-S
2005	Honda	Civic	Si
2006	Acura	RSX	Base
2006	Acura	RSX	Type-S