Just finished swapping out my rear diff after it crapped out. Now when I put the gear selector into drive from park, I hear a hydraulic type sound with a quarter second hesitation. The transmission seems to shift fine. Any thoughts?

 

Is it like a long clicking noise? If it is, u should be fine. Its just the shift solinoid. Mine has done it for years.

 

Not so much a clicking noise. Maybe the selenoid is going bad.