LOL. There are two different type transfer case, one is built onto the back of the tranny and shares fluid with the tranny. The other bolted to back of tranny but has its own fluid, separate from the tranny.

The bad thing about the design that shares fluid is that you can't replace the universal in the gearset that sends power to front driveshaft. Used gearset for this type transfer case are available on ebay for around $1100. This transfer case does have a "differential" assembly built into the main gear assembly that bolts to output shaft of tranny.

The biggest issue I've seen on the other type transfer case is the chain wears and has to be replaced. Im thinking this unit is the one the 4wd Sprinters run.

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Jim