Early Discos also had 10 spline axles. 10 and 24 spline axles are different lengths, so you cannot simply change the diff centre and axles. You have to change the stub axles, wheel bearings and everthing as well. You can get after market axles that will allow you to go to a 24 spline centre without having to change the rest. When Range Rover went to ABS they changed the CV and front axle set-up to a weaker unit. So you are probably better to stay with a non-abs car if possible. Less hassle that way. As already pointed out, the drive shaft lengths are different between the two transfer cases. You can get rid of the rotoflex by changing just the drive flange rather than the whole diff centre.
All the bits basically change over. So you can simply pull out the whole diff assembly (back or front) and just swap them over.
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