Does this include the differential or final drive?

No, this is the gear box assembly only; the differential is a separate component.

What is the gear ratio for the 5th gear in this set?

The ratios are standard OEM spec for DB12, designed for fuel economy and acceleration.

Are the bearings and seals included in this assembly?

Yes, all necessary bearings, thrust washers, and seals are included for a complete rebuild.

Will this gear set reduce transmission whine?

Yes, precision helical cutting of the gears ensures quiet and smooth operation compared to straight-cut gears.

Is this assembly compatible with a limited-slip differential?

Yes, the output shafts are splined to accept both open and factory limited-slip differentials.

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Part

Gear Box Assembly

Name: Gear Box Assembly
Brand: Aston Martin
SKU: 5
Availability: InStock

Compatible with Aston Martin DB12

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In Stock - 33 units available

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Product Description

Rebuild your transmission with this complete gear box assembly for DB12. It contains all internal gears, shafts, and synchronizers for a full overhaul. Engineered to handle the factory power output of DB12 with minimal noise. Restore smooth shifting and reliable operation to your DB12 with this comprehensive gear box assembly.

Key Features

Includes all main shafts and counter gears
High-strength alloy steel construction
Shot-peened gear teeth for fatigue resistance
Replacement synchronizer rings and hubs
Factory-spec gear ratios for optimal performance

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