front diff

Moderators please sticky this post. Look at # 38 on the list below the map.... Http://parts.nalleygmc.com/products/GMC/2004/ENVOY-4WDXL/SEAL-Front-Axle-Front-Wheel-Drive-Axle-Shaft/2631191/12471618.html I looked all day for this part, parts4chevys .com either doesnt have it or I couldnt find...

Trailblazer front diff into bravada??? I have a Brand new from a crate front diff 3.73 RPO·GT4 p/n for a trail blazer...same 2 bolt by rear yolk....Yes I study way too much!!! Will it work in my bravada and remain awd?..... I realize that the 4wd unit has different intermediate shaft bearing...