Hi i need help guys my car’s transfer box is gone think the bearings inside have broken and are making a humming sound I purchased a transfer box on eBay for £1000 the guy said it will fit my rs3 as it’s come of a 2017 rs3 saloon same as my so i purchased took the car to the garage so when they tried fitting the transfer box there was a little different to the boxes my boxes is all round the 1 I’ve purchased has 3 screws that fit in there i don’t have that on my car the turning thing is different also what do i do?