April 20, 2015

NEW! GM 6L80/90 4-5-6 Clutch Backing Plate

Featuring a stiffer backing plate design proven to outperform OE plates, Sonnax 4-5-6 clutch backing plate 104140A-01 effectively minimizes flexing/bowing when the clutch is applied, drastically reducing the possibility of clutch plate distortion in GM 6L80/90 transmissions. 

Complete kit also available: 
4-5-6 Clutch Apply Piston Kit 104960-01K

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