Classic Transmission

Classic Transmission Classic Transmission stock and supply gearbox components for most Early American and Australian manual transmissions. Based in Auckland , NZ.

In addition we also have a substantial background in rebuilding both manual transmissions and differentials.

FORD 3+OVERDRIVE - the perfect solution in a fuel crisisInstead of 4th being 1:1 like the earlier Toploader , this gearb...
16/05/2026

FORD 3+OVERDRIVE - the perfect solution in a fuel crisis

Instead of 4th being 1:1 like the earlier Toploader , this gearbox makes 3rd 1:1 allowing 4th to be an overdrive gear.

This allows you to go faster and also gives more fuel economy on the highway as you won’t have to rev so high.

These were being used in Ford Mustangs before the T5 came along.

Tremec TUET7000 , part of the T56 evolution towards TR6060
26/04/2026

Tremec TUET7000 , part of the T56 evolution towards TR6060

T56 - preventative fixThis gearbox was designed for America’s muscle cars and it fit the requirement perfectly. However ...
01/04/2026

T56 - preventative fix

This gearbox was designed for America’s muscle cars and it fit the requirement perfectly. However Holden and Aussie Ford fitted it to family saloons and utes which often pulled heavy loads for prolonged periods.

A common failure I used to see in the Commodore and Falcon T56 gearboxes was the thrust collar behind 6th gear welding to the bearing. The loaded gear would press hard against the collar spinning it on the bearing without any oil getting in between the two parts. The collar would start to weld and as both collar and gear expanded with the excess heat the gear would also start to fuse.

As you go through the images you’ll see the original part , where it sits in the assembly and then the modified part. This surprisingly simply fix made a huge difference.

FOR SALE - listed on trademe Holden V8 M20 Gearbox - Rebuilt 4 speed10 gearboxes came apart to provide the best gears , ...
31/03/2026

FOR SALE - listed on trademe

Holden V8 M20 Gearbox - Rebuilt 4 speed

10 gearboxes came apart to provide the best gears , hubs and synchros available.

New: Input shaft , Heavy Duty Front Bearing Retainer , Bearings and Seals.

This runs a 3.05 first gear ratio , so it's very close to the 2.95 ratio used in the VN-VS T5 and T5G (VK-VL). This shares the same driveshaft and mounting points as the trimatic auto transmission so it is an easy conversion.

Will fit behind 253 , 308 and 304 engines.

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Beachlands

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Monday 9am - 5pm
Tuesday 9am - 5pm
Wednesday 9am - 5pm
Thursday 9am - 5pm
Friday 9am - 5pm

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