Tech source said he did but that ' s like trusting a theif saying they were just borrowing it . <| sep |> I don ' t wear no diapers . <| sep |> None , it ' s the original transmission . If you aren ' t road racing the car and can launch it well I think it ' s okay . Doesn ' t take failed launches and is pickier with maintenance and no doubt the 5 spd is more robust but the biggest issue is heat generated from something like a road race frying it . Other two issues are people banging the shift fork relief for the 45 rod against the chassis when people do a clutch and also the 56 shift rod gets bent if you lock out put or miss a 4 th gear shift , which makes it sticky to get it in to 6 th but doesn ' t damage anything per se . If you keep it in the mid 400 ' s power wise I would say it ' s as good as the 5 . When you ' re up at where this car is at now I think the margin for error is razor thin though .