A warning to all with the BMW/Titan diff - IMO it will fail! Not if but when.
There have been few posts/threads here about Titan LS units showing signs of failure or abruptly failing. So few that I believe the problem is the tip of a very large iceberg.
I have fallen in to the 'failing' category.
I became suspicious when first driving the car post lock down. Lots of chattering especially when cornering hard with a slight application of power told me all was not well. The diff wheel direction check finally answered my fears.
I stopped driving the car some months ago & have recently dropped the diff & had the pleasure of inspecting the Titan internals. After seven years & 20000 miles all I can say is that I was lucky & wise to have grounded the car when I did. All the springs had failed at one particular point tangentially, the thrust washers are so worn down that I could probably shave with the inner edge.
And surprise, surprise the plates were carbon faced - I thought that the move from sintered to carbon may have been as late as 2015? My LSD is 2012 vintage. Obviously incorrect on that one.
Luckily the crown wheel & pinion survived this slow break down.
One could have the Titan unit refreshed with sintered plates & the remaining internals overhauled if required but I would guess that the same problem would likely be revisited. Many factors depend on how quickly another refresh would occur - 3 days, 3 weeks, 3 months or if you are very lucky 3 years. Or longer. But the more the years & miles pile on driving in total innocence the closer one is to catastrophic failure.
Is the Titan LS unit fit for purpose? IMO the Titan unit is definitely not a 'fit & forget' unit, has never been so due to some design & manufacturing aspects & probably never will be. Those of you out there that have been affected would likely say the same. A certain car manufacturer would discount the claim unless the problem with the Titan unit is a BIG one & the warranty claims keep on piling in. Best to keep a lid on that one then? The industry & those that service the Titan would dispute that there is anything amiss because owners will be spending at least £600 or more if unlucky for a refresh or purchasing new units to keep the coffers filled up. Keep on keeping on & keep quiet?
Does the Seven race series have problems? Will we ever know?
A well known driving experience provider became so p**sed off with spending enormous amounts per year to refresh Titan LS units that the decision was made to change direction. OK the cars & the LSD get a hammering but to some extent they should be able to take it so as not to need refreshing a couple of times a year losing revenue through labour costs & being off line.
I have made the decision to go in a different direction & not have a refreshed unit of questionable long term serviceability fitted to my diff.
Names & places have not been mentioned for protection purposes!