Hello and thank you for using Just answer! I'm Billy and i will assist you with this. Feel free to ask if you need any further info.
A V6 2.7 liter 4wd XL7's differential would fit from years 2001 to 2006
If you get from an 05 grand vitara, it would fit, however, it has a different ratio.
So you should get one for a XL7, from any of these years, the OEM part number of the carrier assmebly would be:(NNN) NNN-NNNN00
Do you know of a good source for a used one?
i cannot advertise here........however, you may check online part shops, or even ebay (but when buying from ebay, make sure you get it from a dealer, and not a car owner.....
Thanks for your great information.