Availability

- In Stock Items. Ships Today. (2) The options in this area are not available since you have already selected choices in the area. Use the "Get Results" button for your current choices.
- In Stock Items, Including at a Supplier. Ships In a Few Days. (3) The options in this area are not available since you have already selected choices in the area. Use the "Get Results" button for your current choices.
- All Items, Including Not In Stock (4) The options in this area are not available since you have already selected choices in the area. Use the "Get Results" button for your current choices.
Filters
Transmission Manufacturer Code
- 4L80-E (2) The options in this area are not available since you have already selected choices in the area. Use the "Get Results" button for your current choices.
- 4L85-E (1) The options in this area are not available since you have already selected choices in the area. Use the "Get Results" button for your current choices.
- 5R110W (1) The options in this area are not available since you have already selected choices in the area. Use the "Get Results" button for your current choices.
- THM400 (1) The options in this area are not available since you have already selected choices in the area. Use the "Get Results" button for your current choices.

Sonnax Clutch Backing Plates

5.0 out of 5 stars 8 Customer Reviews

GM 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 your clutch-apply pressures exceed OE specifications. Sonnax clutch backing plates are designed to minimize flexing/bowing when the clutch is applied, drastically reducing the likelihood of clutch plate distortion. Their stiffer backing plate design outperforms OE and aftermarket plates.

Showing In Stock Items. Show All 4 Items.