Yes - if it ain't broke, don't fix it.
Put another way, no one comes to a forum and tells people about how their gearbox is not broken.
haha Simon - perhaps I should clarify by saying I'm not coming on the forum to tell people that my gearbox is working perfectly - as if anybody would care. I'm asking for specific information about a Lucas product's suitability to help get longer life out of this box. Let me put it another way - if it ain't broke, you can't fix it even if you want to, but you can undertake preventative maintenance such as the more frequent oil changes that Greg C recommends from his experience. I'll take your comment to mean you have nothing to add in terms of what might extend the life beyond the 'official' service procedures? Perhaps I should have asked Shanadoo in a PM since he seems to have experience with these types of boxes and that Lucas products will help.