M32 Gearbox 4th Gear Gen 1 48T 55566891 Vauxhall / Alfa Romeo / Fiat

M32 Transmission 4th Gear (48T) Generation 1

Vauxhall / Opel — 55566891

Generation 1 M32 4th gear, 48 teeth — output shaft position 28.

This gear will not fit Generation 2 or Generation 3 M32 gearboxes.

Part Number

55566891

Fitment location 28 on diagram

Vehicle Compatibility

Generation 1 M32 gearbox — Vauxhall / Opel / Alfa Romeo / Fiat / Chevrolet / Saab vehicles with M32 / F17 / F23 Gen 1 gearbox. Not compatible with Gen 2 or Gen 3.

Why Choose Eco Torque?

As M32 gearbox rebuild and repair specialists, Eco Torque was one of the first companies in the UK to offer M32 bearing and gear upgrades. We pride ourselves on sourcing and supplying only parts we trust.

Browse Eco Torque's ever-evolving product range at competitive prices.

Need Help Finding the Right Part?

If you cannot find the items you need or are unsure if the part is compatible with your vehicle make and model, please send us your UK registration number or VIN Code and we will direct you to the right part.

Frequently Asked Questions

Q: How do I identify a Gen 1 M32?
A: Generation 1 M32 gearboxes were fitted from around 2002 up to approximately 2009/2010 in most applications. If in doubt, cross-reference your gearbox variant code or contact us with your VIN.

Q: What symptoms indicate a worn 4th gear?
A: Common symptoms include difficulty engaging 4th gear, crunching or jumping out of 4th, and abnormal noise under load in 4th.

Q: Is this a genuine OE part?
A: Yes. The OE part number for this 4th gear is 55566891, manufactured to original specification.

Reference Number: ET2351