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Other Part Number: S24161

Manufacturer Part Number: 41820-08

Brand: Sonnax

180, 180C (3L30)

Modulator Sleeve
Part No. 41820-08

The cast aluminum modulator valve sleeve in the GM 180, 180C case is known to wear due to continuous stroking of the steel valve. This valve regulates line pressure into modulator pressure and is also controlled by governor pressure. Excessive sleeve wear can result in leakage of line, modulator and governor pressures, leading to a multitude of shift complaints and poor line rise. Sonnax modulator sleeve 41820-08 corrects these issues by restoring hydraulic clearances.
  • Upgraded material resists wear

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