i recently changed my gearbox since the synchro on my last one went, since i put this box on, everytime i start the car i hear a loud squeak sond before the car starts. i was told that it was the starter motor grinding on the ringear. so i changed the starter for a brand new one and i still have the same problem, once the car starts it dissapears?
flywheel and ringear are brand new and worked fine with my last box?
any ideas?

please advise

thanks