Does an axle off any petrol frontera fit a 2.4 petrol frontera?
There are is range of different ratios, as well as a change of rear suspension type - leaf spring changed to coils.
To be sure, each axle has a small metal tag giving the ratio fitted. These are held by one of the cover bolts.
If you match the ratio you should be ok - just check the suspension type is the same!
(and remember the Fronty has 2 axles - however the ratio information tag is also present on the front one, and will be the same ratio as the rear)