I’m posting this thread to hopefully seek long term engagement and support for what will be a long term winter project.
Some will think my approach is a bit well expensive, I guess it is, but for ease, convenience and the opportunity to learn I’ve gone this route.
While in the UK for the Taffia FnC run I placed an order with CC for delivery to the in-laws for a complete new Titan diff. I know expensive! Now I don’t believe my Titan has any immediate issues, well no more than it ever had. The current and original diff has done ~4500miles and will clock up the best part of ~5000 total miles by the time I’m back to the IOM. I figured with all the discussions about the Titan diff I’m getting close to a period of potential concern and risk. If so, having confidence the diff is right is important, especially if enjoying the IOM liberal speed limits. The 420R still hasn't seen a circuit, but it's seen high speeds.
I appreciate I could just remove the diff, check it, and ship it for a rebuild if required. Shipping heavy stuff on and off the IOM is an expensive PITA, and fraught with the potential for damage and loss. Hence placing the order for a new one while in the UK, one which I can collect. More than that though is having the opportunity to have a spare while rebuilding the first. This makes the whole process less stressful and gives me a real opportunity to learn at a leisurely pace.
Over the winter I plan to disassemble the rear of the car, remove the diff, drive shafts and prop shaft plus all the other components which need to come off for easy access. I'll thoroughly check the shafts etc, and refit with the new diff. This places no time pressure to rebuild with the original diff, so I can still enjoy the car while attempting to expand my understanding.
I hope to learn more about the diff, spotting signs of poor wear from within by performing some basic dismantling. If it needs to go away then I can when I have time etc.
I'm convinced there's a plethora of lowly skilled owners out there in the same boat as me, with aging Titan (sintered plate) diffs all wondering how bad is bad. Of course this will make good content for my blog, which has always attempted to cover the build and challenges of ownership from the less technically competent side. There's loads of blogs out there with content that is far superior (technically) to my own. Bringing the experience from my position on the learning curve I'm sure will be beneficial to many others.
Of course I'll keep posting here with updates and the inevitable queries, a sort of (re)build thread.
I hope this will be of interest to you all, especially those I hope will provide input and expertise along the way.
If anyone get recommend good reading material on diffs (installs, tolerances etc etc). I won't be starting until November, so have a month or so to learn what I can.