Try to lift up the engine.Make sure once again all the bolts are loose.You might have pieces of metal from clutch who are stuck between the flyweel and transmission.So lift up and down the engine ,and it has to come off!If pieces of metal are stuck,you will have to push harder,and after you lift up the engine try to twist left and right the transmission,wile you are pusing the transmission outwards.
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Auto Technician
