Vauxhall Astra/Insignia/Vectra F40 Gearbox 2nd Gear 51T 55568643

F40 Gearbox 2nd Gear (51 Tooth) – Vauxhall, Opel, Alfa Romeo, Saab, Chevrolet

Genuine 51-tooth 2nd gear for the F40 6-speed manual gearbox (output shaft side). OE reference 55568643. This gear is the direct replacement for F40-equipped vehicles showing damage or excessive wear on 2nd gear.

Important: There is no universal reference system for the F40 gearbox. Due to production variations, customers are required to verify this gear against their existing unit before ordering — check tooth count (51T) and dimension. Eco Torque can advise if you are unsure.

Vehicle Compatibility

• Vauxhall Astra, Astra VXR, Cascada, Insignia, Insignia VXR, Signum, Vectra, Zafira
• Opel Astra, Cascada, Insignia, Signum, Vectra, Zafira
• Saab 9-3, 9-5
• Cadillac (various)
• Chevrolet Cruze, Malibu, Orlando

Gearbox: F40 (6-Speed Manual)

Frequently Asked Questions

How do I confirm this is the right gear?
Count the teeth on your existing 2nd gear — this part has 51 teeth. If in doubt, contact us with your gearbox number and we'll advise.

Is this an OE part?
Yes — OE reference 55568643 is a Vauxhall/GM genuine part number.

Does this fit Alfa Romeo?
Some F40-equipped Alfa Romeo models use this gear. Please confirm your gearbox code and tooth count before ordering.

Can you help identify my gearbox code?
Yes — contact us with your vehicle VIN or gearbox number and we can advise on fitment.

Do you offer a warranty?
Yes — all Eco Torque parts carry our standard parts warranty. Contact us for details.

Why Choose Eco Torque?

Eco Torque are UK-based transmission specialists with years of experience supplying quality gearbox parts. We stock genuine OE, OEM-quality and uprated aftermarket components, and our team can advise on the right part for your application. All orders are dispatched promptly with full tracking, and we back our parts with expert aftersales support.

Need Help Finding the Right Part?

Not sure if this is the right part for your vehicle? Contact our team — we're happy to help confirm fitment before you order. Use the contact form, email us, or call us directly.

Reference Number: ET2385