my 2000 chev astro van trans slips 1&2
get your tranny rebuilt before it blows because it will cost a lot more after the fact than it will if you bring it in now.
add no seal repair gunk ;BUT, it can quite often cure it if you DRAIN the tranny ,new filter,clean up pan.......Drain not flush......complete drain takes more than just dropping the pan because that will only get out 1/2 or less. Works a lot of the time to probably add enough miles to get you through for many,many,many miles. Inexpensive thing to at least try
Search Chevrolet Astro Questions
Chevrolet Astro Experts