[labs4ever]

Have you tried checking for the proper fluid level in the t-case. They seem to be rather sensitive to proper level. My tail shaft seal was leaking for sometime dropping the level to a point that the t-case was coming out of 4 wheel no matter what mode I put it in. My friends ZR2 would not come out of 4 wheel unless he held the two wheel button in and drove in reverse. Ended up being a fluid level also.