Hi, i have a mk4 bonus that i have bought as a project with rs turbo running gear, when i accelerate in 1st and 2nd it will go all way to red band but in 3rd it will only go to roughly 4k and the rev counter go to zero and looses all power as if i have put the brakes on till i change up to 4th, any ideas wot this could be??

the engine is a mfi rs turbo
gearbox is a fiesta turbo non lsd i was told........ i have had this rebiult and an lsd fitted as i thought this was the problem but it still happens! any ideas what could be causing this?

thanks for reading and hope you can suggest anything

Just to let you know i have fitted the recon gearbox new clutch so cant be this

cheers, Nick