hey guys my dad has a v reg subaru impreza 2.0 turbo and the rear diff ran dry on the motor way , i sent the diff off to a rebuilder who said there was nothing he could do and get one on flea bay ,he told me the raito was 3.54 so i found one and fitted it this weekend but there is some thing really wrong with it there are loud bangs and the car seems to be holding back like it is strugling to drive any i dears what is wrong as i am well lost ,is there any way to check the raito
