I can't find a clear explination or drawing of Suzuki's 4x4 systems. Long story short, I'm doing a H27A engine swap into the x90. What I'd like is a full time awd system similar to a Subaru. This means the transfercase -must- contain a center differential. From what I've been reading, the Grand Vitara offered 2 versions of 4x4. One of them is selectable (2wd/4hi/4lo) and the other is controlled by the traction control system. I'm going to assume the electronically controlled one has a center diff and uses the abs system to brake the slipping axle. Is this correct? Is there any mechanical or electronic control of the transfer case itself such as a solinoid/motor controlled clutch pack or anything of that sort? Or is it simply just a single range (4hi) tcase with a center diff? Is the front axle switched in/out at all?
If there is a transfer cazse with a center diff that will bolt to a Vitara manual transmission, can you guys get me a list of years/models that have it so I know what to buy?

Is this one of them? http://cgi.ebay.com/ebaymotors/Transfer-Case-27085-ASSY-MT-T-CASE-54K-OEM-_W0QQcmdZViewItemQQfitsZModelQ3aGrandQ20VitaraQQhashZitem43a343e0e1QQitemZ290501943521QQptZMotorsQ5fCarQ5fTruckQ5fPartsQ5fAccessories

That link appears to be for a 4X transfer case for the GV.  While it states ALL ENGINES, the Fit / Interchange lists the 2.5 Liter Vitara.  The XL7 2.7 uses a larger input and rear output shaft on the Transfer case (front shaft is same for Kicks, Vits, GV's, XL7's).  The inner gears will readily interchange.

I'm trying to avoid opening anything and swapping gears. This is what I need. I need a 2.7L engine, manual trans (from 2.7L), and a single-mode AWD transfer case for the 5-speed. I'm cramming this in an x90 and trying to figure out the major components first. I can always get driveshaft yokes for whatever tcase I use.

So far I've found out pre '06 GVs do not have a center diff and the 06+ GV has 2 transfer case options both with a center diff. A single-mode and 4-mode. They can be found with automatic or manual and v6. Can someone verify?

EDIT - Ok it looks like the '06-'08 manual have the awd tcase I'm after. Now to find the H27A and some pistons and rods.

Anyone know where I can find the compression height for the H27A?