I owned a BA Falcon, which I used as a taxi for four years. I found the cure for a noisy diff was to change the oil and add Penrite Diff Additive. There was never a murmur after that. I can recall ...

Instead of simply replacing the diff in the Falcon with another faulty Ford diff is there any form of aftermarket product or prevention set-up that can solve the problem? Ford used a two-pinion set-up ...