your 3.5 any after 94 will be 24 splineim not sure its a 1999 defender td5
its not a p38 its a old onetd5 defender or disco? to the best of my knowledge the diff casings are a different shape, that what i was told when i was sold a p38 diff instead of defender one.
its not as new as 1994 its older than that so will it fit in my defender?your 3.5 any after 94 will be 24 spline