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Remember, transmissions have variations based on year, make, model and engine size, as well as for 2WD, AWD, 4x4, gas, diesel or hybrid and in some situations half years.  We encourage you to chat or call toll free with one of our knowledgeable staff members that will assist you in finding the correct part the first time and answer any questions you may have regarding parts for your build. Our goal simply put, is to get you moving with one order.

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6L80 6L90 4-5-6 Clutch Backing Plate Sonnax 104140A-01

Regular price $69.99 USD
Regular price Sale price $69.99 USD
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6L80 6L90 4-5-6 Clutch Backing Plate Sonnax 104140A-01

6L80 and 6L90 transmissions often suffer failure of the 4-5-6 clutch assembly due to flexing and bowing of the backing plate (coning), especially when clutch apply pressures exceed OE specification. The heavy-duty Sonnax 4-5-6 clutch backing plate 104140A-01 is designed to minimize flexing/bowing when the clutch is applied, drastically reducing the likelihood of clutch plate distortion.

  • Stiffer backing plate design outperforms OE and aftermarket plates