Recently my car was nudged in a car park whilst in park. There was no external damage, But it hesitated going into reverse, however it did go in at the 3rd attempt. Ever since im now getting a high pitched rotary squeak on lift off. But not when its changing gear. Been to VW main dealer for insurance claim they quoted for new gearbox, but their insurance isn't playing ball. Is there anything simple it could be, before I go spending lots of money!