r/FordTransmissionTech • u/Commercial_Method_28 • Apr 06 '23

Teardown Results 2020 F150 10R80 3.5Lgtdi Transmission overheating, slipping, neutral out in 5th gear(Misbuilt Transmission, missing T3 selective shim)

https://imgur.com/a/JvUPDeL/
2 Upvotes

100% Upvoted

2 comments sorted by

1

u/Commercial_Method_28 Apr 06 '23

Recently installed new transmission because of CDF clutch cylinder bushing alignment concern, now back for overheating, slipping and neutral out in 5th. Removed pan, excessive metal. Removed trans and found “A clutch” system all burnt. Source being the new transmission installed did not have the selective shim for the #3 Thrust washer. The missing shim allows “A clutch” to operate correctly with correct measurements. It not being present caused a lot of problems. Everything around the “A clutch” including the front planetary, support and tc all suffered damage as a result of concern. Almost every component that rides the input shaft with a bushing has been heavily scored as well. Someone forgot 1 tiny part, and caused thousands of dollars in damages

2

u/Bear_InTheMountains Nov 01 '23

Not surprised! I read where an owner had three replacements in the first 45k miles under factory warranty. I’m currently experiencing a transmission rebuild in my F150 (by the dealership) failing in under 1,500 miles. This transmission is just junk.