Automatic Transmission Input Sun Gear – GM (24254573)

Automatic Transmission Input Sun Gear transmits drive at a fixed ratio and is matched to its shaft by tooth count and spline. A single tooth difference changes the ratio and surfaces as a speedometer error or a shift complaint.

Replace the Input Sun Gear when tooth faces show pitting, when a whine rises with road speed, or when there is metal in the fluid. Gears wear as a set, so replacing half of one usually brings the noise back.

For this Input Sun Gear the reference is 24254573, in our Gears & Internal Parts range. Compare it with the number on the part you are replacing rather than with a photograph.

The stock here is genuine GM, and this Input Sun Gear keeps the original engineering number, which matters once a number has been superseded more than once.