I had buy a JAP SPEC Supra TT Tranny and i send it to Boostlogic in Amerika. Boostlogic upgrade the tranny and send it to me.Its a 340 tranny.
A 3040 is the NUMBER on the Tranny.
343 is stronger as 340.
343 have 7 forward clutch and 340 have only 6 clutch.
343 have 5 direct clutch and 340 have only 5 clutch.
340 is good for 500PS and 343 for 1000 PS.(or 550)