M32 Gearbox Updated Reverse Gear Synchromesh Vauxhall / Alfa Romeo / Fiat 55566681

M32 Transmission Updated Reverse Gear Synchromesh Ring (Alfa Romeo, Fiat, Vauxhall)

This updated reverse gear synchromesh ring is a genuine OEM replacement for the M32 6-speed manual gearbox. It is a revised design (update over the original item) used to address reverse gear engagement problems. OE part numbers: 55566681 (updated), 55503135 (original). Fits Alfa Romeo, Fiat, Vauxhall/Opel and Chevrolet M32 gearboxes.

Gearbox: M32 (6-speed manual)

Compatible vehicles include:

• Alfa Romeo 147, 156, 159, Brera, Giulietta, Mito, Spider
• Fiat Bravo, Croma, Grande Punto, Linea, Stilo, Tipo
• Vauxhall / Opel Astra, Vectra, Zafira, Signum, Corsa, Insignia
• Chevrolet Cruze, Lacetti
• Saab 9-3

What is the difference between 55566681 and 55503135?

55566681 is the updated (revised) reverse synchromesh ring that supersedes the original 55503135. The newer part incorporates design improvements and is the recommended replacement for both variants.

What symptoms indicate a worn reverse synchromesh?

Difficulty selecting reverse, crunching when engaging reverse gear, or popping out of reverse under load are typical signs of a worn reverse synchromesh ring.

Can I fit this without a full gearbox strip?

The synchromesh ring is inside the gearbox, so a full disassembly is required. We recommend inspecting all synchro components while the gearbox is open to complete a thorough rebuild.

Is this suitable for Gen 1 and Gen 2 M32 gearboxes?

Yes. The reverse synchromesh ring applies to both generations of the M32 gearbox family. Please verify your gearbox code before ordering if you are unsure.

Why Choose Eco Torque?

As specialists in gearbox rebuilds and repairs, Eco Torque takes pride in offering genuine gearbox parts, high-quality aftermarket alternatives and competitive pricing.

Need Help Finding the Right Part?

If you are unsure whether this part is compatible with your vehicle, send us your UK registration number or VIN and we will help you find the correct part.

Reference Number: ET2011