Just refitted my gearbox with new clutch and now got no 5th or reverse gear. Can select these gears but have no drive when the clucth is let out. The reverse lights are not coming on when selecting reverse either. Have had the gearbox apart to replace the input shaft seals could it be something i have missed or something not gone back right? The car drives fine in all the other gears no noises or whines just no drive in 5th any ideas?or is it box out time again