M32 Gearbox Updated Endcase Shim Upper and Lower Mainshaft 24461953 1.25mm

M32 GEN 2 Gearbox Updated Endcase Shim – Upper and Lower Mainshaft 24461953 (1.25mm)

A genuine Vauxhall / Opel updated endcase shim for the M32 GEN 2 gearbox, used to set correct mainshaft end-float during a gearbox rebuild or end-case upgrade. This shim is part number 24461953 with a nominal thickness of 1.25mm and is required when fitting the larger updated end casing on M32 GEN 2 units.

Fits transmission: M32 GEN 2 6-Speed Manual Gearbox (all M32 GEN 2 variants)

Please note: This shim is NOT compatible with first-generation M32 gearboxes featuring the smaller end casing. We are unable to advise on shim thickness — the required shim must be measured during the rebuild and cannot be pre-determined.

OE Part Number: 24461953

Fitment location: Positions 31 and 56 on the M32 exploded diagram

What is the updated M32 endcase shim used for?

The endcase shim sits at the mainshaft positions (31 and 56 on the diagram) and sets the correct pre-load and end-float when the M32 GEN 2 updated end casing is fitted. Selecting the right thickness is critical — too thick or too thin causes excess bearing load or mainshaft play.

How do I know which thickness shim I need?

The correct shim thickness can only be determined by measuring during the gearbox rebuild — it cannot be pre-determined or supplied without measuring. You will need a dial gauge and feeler gauges to measure the end-float and select the matching shim size. We are unable to advise on thickness without the measured data from your gearbox.

Will this shim fit the first-generation M32 gearbox?

No — this shim is for the M32 GEN 2 (updated, larger end casing) only. The first-generation M32 has a smaller end casing that uses a different shim specification. If you are unsure which generation you have, send us a photo of the end casing or your VIN.

Which vehicles use the M32 GEN 2 gearbox?

The M32 GEN 2 gearbox is fitted to a wide range of Opel, Vauxhall, Fiat, Chevrolet, Alfa Romeo and Saab models from approximately 2004 onwards. These include the Astra J/K, Insignia, Zafira, Meriva, Mokka, Corsa, Cascada, Fiat Grande Punto, and Chevrolet Cruze, Orlando and Trax, among others. Send us your VIN to confirm GEN 2 fitment.

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: ET2304