M32 Gearbox Gen 3 - 2nd Gear (40T) 55580385 Vauxhall Alfa Romeo Fiat
Ex VAT: £59.37
✓ In stock at our Arlesey workshop
Order before 2pm on a working day and this is picked and dispatched the same day by express courier, normally with you in 1–2 working days.
Collection from Arlesey also available — choose it at checkout.
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Delivery and Shipping
UK delivery — parts we hold in stock
Ordered before 2pm on a working day, these are dispatched the same day by express courier and normally arrive within 1–2 working days.
Parts supplied from our European supplier
A large part of our range is held by our supplier in Germany rather than on our own shelves. We order these in for you as soon as you place the order. They normally dispatch within 7–10 working days, and are then sent on by express courier like anything else. Nothing ships to you direct from Germany — it comes to our Arlesey workshop first, so you deal only with us for returns and warranty.
Collection from Arlesey
Click and collect is available on parts we physically hold. If an item has to come in from our supplier it cannot be collected, and checkout will tell you so before you pay.
International
3–5 working days once dispatched. Any customs charges or excise duties are the responsibility of the buyer.
*Delivery times are estimates and can be affected by factors outside our control.
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M32 Gearbox Gen 3 Second Gear 40 Tooth – Vauxhall / Alfa Romeo / Fiat
This is an M32 6-speed gearbox second gear with 40 teeth, Vauxhall OE part number 55580385. This component is a direct replacement for the generation 3 M32 gearbox (2016 onwards). The 40-tooth second gear is a variant of the Gen 3 M32 ratio set and must not be confused with the 41-tooth version (55580384). Not compatible with M32 Gen 1 or Gen 2 gearboxes.
OEM Reference: 55580385
Tooth Count: 40 teeth
Application: Second gear (2nd)
Compatibility: M32 Generation 3 (2016 onwards) ONLY
Fits: Vauxhall, Alfa Romeo, Fiat, Opel and SAAB models fitted with the M32 Gen 3 6-speed manual gearbox from approximately 2016 onwards. Contact us to confirm compatibility with your specific vehicle registration.
What is the difference between 55580384 and 55580385?
Both are Gen 3 M32 second gears, but with different tooth counts — 41T vs 40T. They suit different final drive ratio configurations within the Gen 3 M32 family. Use your OE part number or VIN lookup to confirm which tooth count your gearbox requires.
How do I confirm which M32 generation I have?
Gen 3 gearboxes were introduced around 2016. Check the gearbox code stamped on the casing, or send us your VIN for a precise generation confirmation.
What symptoms indicate second gear failure?
Common signs include crunching or refusal when selecting 2nd gear, jumping out of 2nd under load, or grating that worsens over time. These usually point to synchromesh or gear tooth wear.
Is this a genuine OEM part?
Yes. Part number 55580385 is an original Vauxhall OEM component.
Can I fit this gear myself?
Full gearbox disassembly is required. This is not a DIY job — specialist tools and preload knowledge are essential. We can advise on rebuild services if needed.
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: ET2360
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Please confirm fitment against your vehicle registration or gearbox code before ordering.
Fits these gearbox / transmission codes — check your gearbox code if unsure.




