fews months ago I changed my FD to a 3.9 and it was suposed to been done by professionnal mechanic ( he has over 20 years in trans and diff) soo I thought that would be fine to let them work on it.

now after fews run on the track the bearing on the pinions is broken , the diff is leaking oil by the pinion oil seal.



the other solution would bring the car to the Nissan dealer (Barrie) but im wondering how long it could take them to fix it.

anyone knows ?