What are the differences between the AWD T-Case IDs?

[shadowless127]

What are the differences between the t-cases? When I look on car-part I see different T-Case IDs and seems that there is no real method to the madness of each year using a certain t-case ID.

 

[SoNic67]

I though that are only two AWD cases for Explorer: BW 4405 for 95-96 and 97-01:
http://www.monstertransmission.com/BW-4405-Transfer-Cases_c_3817.html

 

[Turdle]

What are the differences between the t-cases? When I look on car-part I see different T-Case IDs and seems that there is no real method to the madness of each year using a certain t-case ID.

'97 ( some early 98) AWD 4404 has a speed sensor at the rear output.
'98-up has no speed sensor and 6 bolt cv joint cup.

 

[shadowless127]

'97 ( some early 98) AWD 4404 has a speed sensor at the rear output.
'98-up has no speed sensor and 6 bolt cv joint cup.

That's what I thought. So any t-case from a 99-01 should bolt up to my 01 then, right? Regardless of ID #?