I have bitten the bullet and ordered the new 4.56 ring and pinions, service kits and new rear carrier for the TJ. Whilst I'm mechanically competent, the thought of installing and setting these up is not something I think is within my ability. (I'm happy to admit when i'm out of my depth)
The axles will be off the Jeep to help with the install but I think there may be a birty or two that may be able to help....
If I recall correctly, there's even someone in the midlands that knows which bits go where.....
Graham.