I used to own a 1991 Astro and 1996 Safari:
The 1991 Astro was a beast, never had and issue with it. I just did regular maintenance on it, like engine oil, transmission oil and tune ups. Had this van for 3 years and regret selling it.
The 1996 Safari gave some problems, one the transmission and fuel pump. Took it to the shop fix it after that running like a champ. I believe these problems are common in these vans, however I just love these trucks. They offer lots of room and is perfect for the family. Here in Japan they are really popular, yes Japanese people love Astros/Safari vans!. I'm looking forward to buy another Astro/Safari ones I get station back to the states.
Bottom line get one!