As ScottR400D #541 mentioned one has to bear in mind lots of factors.
TITAN recommend servicing the unit every 12 months, race season or every 10,000 miles. So accounting for the Seven average annual mileage the LSD will possibly have to be dropped every three years. If the car attends track days then potentially the mileage period will decrease. So the diff could have to be dropped every two years or less depending on NVH, break off torque & oil check. Or the fact it just fails which is highly likely especially if carbon plates are involved. But this does not obviate failure of a sintered plate variety by a long chalk.
DIY rebuild kit = £310 direct from TITAN - current price
R & R rebuild = £540 - current price
SPC upgrade & rebuild approximately £1800 with the knowledge that the LS unit will potentially far exceed the TITAN life & service requirements if preventative maintenance is regularly carried out.
Irrespective of car usage if the LSD has to be dropped then the option for the SPC replacement could be an obvious choice unless you DIY service. Not many will want to go down that road.
So with the TITAN, current cost £1080 over a four to six year period which does not include replacement of attaching parts, oil etc. If car is a keeper knowing that one will have to go through the same old routine on a regular calendar/mileage basis could become a potential bind. If nothing else one will be well practiced !!
Or bite the bullet knowing that a rebuilt diff with the SPC unit theoretically may never have to be dropped as long as preventative maintenance is carried out.
Oh....and prices will continue to rise.
Geoff, could I add that if the diff needs a full rebuild, which is quite common if any worn or broken bits from the LSD have been wandering around the housing, the costs can be much more? And if you're not prepared to remove and refit the diff in the car, there's another few hundred of a bill.
When my BMW Titan failed at about 7500 miles, it needed all new bearings and seals and I had a bill from R and R for over £900 for the rebuild.
IME you would be lucky to get away with £540 more than once unless you're rebuilding well before it becomes necessary.
So anybody done 10,000 miles on the SPC unit yet?
I think many have managed that, not too many with higher powered cars though.
I have done 6000 miles and 1 trackday with SPC so far and all seems as it was when it was fitted. My titan had done just over 10000miles as was beyond repair or rebuild. Very happy with the SPC.
I have also tested a Quaife for 1000 miles and if i was only going to use the car for road use i would use if all the time. Drove nice, was predictable and a little quieter.
Tracsport diffs were fitted to the Palmersport pursuit Caterhams which are used pretty much every week day during the 'on' season. From reports, not one has been sent back still years on.
Olly Amos - 2008 Caterham Superlight Sigma 150
#547 I understand that the rest of that story is that the Titans in the Palmersport cars were being rebuilt at least twice a year until they were replaced by the Tracsports.
#544 Well, that question prompted me to head for the garage to check my mileage & I'm happy to report that I've covered 10,901 miles since the Tracsport was fitted, including one track day.
Although I've never checked the preload, the diff is functioning exactly as it was when it was first fitted. It's quiet & unobtrusive & provides bags of traction & very progressive characteristics when traction is (finally!) overcome.
I've changed the oil a couple of times & the oil comes out the same colour that it went in (in contrast to the black sludge that came out when the previous carbon plate Titan was fitted), with a minimal amount of smooth metallic material on the magnetic plug.
I'm very happy that I made the change.
I have only completed 4500 miles with the Tracsport LSU after installation in October 2020.
During the last winter service the mag plug had only break in finings on, the oil was still the correct colour, the break off torque as advertised & the wheels rotated in the same direction. It is very quiet in operation though the CWP sometimes makes what I would call a low volume mechanical 'gargling noise' on feathered throttle or some times on the over run. Otherwise operation as advertised & long may that continue.
I intend to change the oil this Winter as even with the accumulated low mileage a two year point to change seems appropriate.