I wouldn't even try it. I suspect the problem is main shaft wear as well. I
changed the whole gearbox when I had mine done.

Andrew

Icky Hi,

I suggest you take a look at the Ashcrofts' site.
http://www.ashcroft-transmissions.co.uk/

and more specifically the "LT230 FAQ's" where it states.

QUOTE
     I want to change the input gear on my LT230 for a later cross drilled
type, can I do this in situ or do I have to take the transfer box out?

     This is only available on a suffix C or later (last number of transfer
case), it cannot be changed on Suffix A or B transfer boxes. On a 1.667 or a
1.410 removal of the gear is simple, it just slides out; on a 1.222 it in
necessary to rotate the intermediate gear to a position where the teeth on
the middle and rear gears are in line and allow the input gear to slide
through. It is not possible to change a 1.003 in situ.
    top

UNQUOTE

Hope this helps.

Take care
Pantelis