Chevrolet Spark 1.2L B12S1 Automatic Gearbox

This Chevrolet Spark 1.2L B12S1 Automatic Gearbox is a used automatic transmission, removed from a running donor vehicle and inspected by our technicians rather than shipped unchecked. Fluid condition, case integrity, and shift feel are all reviewed prior to listing, giving you a documented starting point instead of a total unknown.

Key Specifications: Housing material and internal gear ratios follow the original factory specification for this application, not an aftermarket reproduction. Transmission type: Automatic (torque converter). We list the gear count as application-dependent for the Chevrolet Spark 1.2L B12S1 Automatic Gearbox: several ratio sets were fitted across different markets and trim levels, so confirm against your old unit or VIN before ordering. Compatible engine(s): B12S1 engine variants. Since the Chevrolet Spark 1.2L B12S1 Automatic Gearbox platform spans multiple drivetrain configurations, confirm your chassis's drive layout against the listing before ordering to be certain of fitment.

Performance Characteristics: Automatic transmissions like this one rely on correct fluid type and level for both shift feel and internal cooling, so confirming fluid spec against your owner's manual before topping up after installation matters more than it does on a manual gearbox.

Common Applications: Fitment centers on Chevrolet models built with the B12S1 driveline referenced above. Since this casting can carry more than one control or spline revision across a production run, the safest path is to confirm against your existing unit or send your VIN so we can verify compatibility before the order ships.