Heinz my car is Nov 2011. Unfortunately it came with the Ford gearbox despite the sales person saying Mazda. Techniques changed the ratio. New crown wheel & pinion, No comments on any difficulties so I guess it has the earlier axle. (For some reason I thought it was a BTR). I was warned the replacement parts can be noisy. Mine does have a whine at certain speeds, not on throttle or off throttle, just when cruising at constant speed. Think it is caused by poor manufacturing tolerance, rather than set up. It does make the car a whole lot more drivable on a daily basis. Use of 5th gear, even at 40mph is the norm. I had it done after 1st year of ownership which was from new. Basically due comments made by Jays on this forum.
Last edited by IcePack; 09/09/22 11:03 PM.
