Hi,
On my 1999 +4 with the T16 unit I've had to fit a new high-torque starter motor (because the original was part of a bad batch that just wasn't up to the job).
The sump and cam-cover gaskets are prone to leakage, but they're easy enough to replace.
The plug leads can deteriorate over time, so it's worth replacing them with the Magnecor ones.
And replace the coolant every few years. (The anti-freeze element will be OK, but the corrosion inhibitor becomes less effective with age).
The R380 gearbox is prone to baulking when changing up to second gear (it was originally fitted to Land Rover Discoveries, so it was never designed to be a quick-shifter!.
Just make sure you use the correct oil in it- ignore what it says in the owners manual - and go for Land Rover MTF94).
The hydraulic tappets can rattle a bit, but if you use flushing oil at every oil change and stick one of the specialist addatives in, that should cure it.
Word has it that this unit is robust, if a little 'agricultural', but at least it's British!
I hope this helps - but also check on the Rovertech forums for some further info.
