Dutch, if you are stuck I'll scan my 1999 Plus 8 Handbook in and send it to you if you drop me a PM with an email address - this system can't cope with pdf format being the reason.
With this and the appropriate
Haynes Manual covering the engine and gearbox it's all you need really mine is for the LR Discovery but yours being a little earlier would probably be a Range Rover one.
Your gearbox I think will be the LT77 and rear axle a Salisbury unit gomog have some information on the cars too but you need to be selective at times with the information as it has been found to be in error over the years..
There are very few questions that remain unanswered on TM of a technical nature, the wealth of knowledge on here is extraordinary and all given willingly, someone has always come across the problem before and it amazes me time and time again.