This bulletin supersedes 26-2309

Bulletin number

TSB 26-2408

Component

Power train

Summary

This bulletin supersedes 26-2309. Reason For Update: update the Model section to remove Aviator 10R80, update the Parts list to add 3.3L to W520514-S440, and add L1MZ-7Z490-G valve body separator plate for Aviator. Some of the vehicles listed in the Model statement above may exhibit at least one of the following conditions: Harsh 3-4, 4-5 upshifts Harsh 5-3, 4-3 downshifts Harsh reverse engagements These symptoms may be worse when cold. This may be due to the F clutch friction plates brinelling into the clutch and planetary container cylinder (7B177).

Owners of these vehicles have filed 554 complaints in the transmission category.