11-13 Buick regal F40 trans (Page 1/1) SecretMoparGuy OCT 09, 01:22 PM Has anyone used this in a Fiero? or does anyone know why it would be any different from one in a G6? I would like to do a 3800 SC six speed build. I'm not sure if Archie still sells the 6-speed kits (guessing no) but I know WCF sells some custom parts and I'm pretty handy with fabrication if needed. Let me know your experience/thoughts. Will OCT 09, 04:48 PM Those transmissions will have the Ecotec bellhousing pattern, and would need an adapter plate to mate to a 3800. The only F40 that will bolt up to the 3800 is from the '06/'07 G6. fieroguru OCT 10, 01:46 AM As Will said, it will need an adapter plate to work with the 3800. It also has different bolt boss locations on the case for mounts, shifter bracket and a different clutch line connector. What that means is that most available F40 swap flywheels, mounts, shifter bracket, and clutch line connector will not work... SecretMoparGuy OCT 10, 09:34 AM Thanks for the responses. I'm looking to get an F40 out of a G6 but I saw ZZPerformance sells reman buick regal F40 and wanted to know if it could be a replacement in the future. fieroguru OCT 10, 11:35 AM quote Originally posted by SecretMoparGuy: Thanks for the responses. I'm looking to get an F40 out of a G6 but I saw ZZPerformance sells reman buick regal F40 and wanted to know if it could be a replacement in the future. ZZP also sells products for the Ecotec engine family... which the Regal transmission is from.