Rebuild or leave trans?

Fishy68 described the kit benefits well.

Auto trans failure symptoms can be all over the map; it all dedends on which part actually fails/starts to fail. More often than not, you will feel something odd in a shift, or the unit wil slip in an odd way. It can go on and on for a while, or do it a few times and then bam-o. I had a GM350 that slipped when cold for several months; just had a worn clutch pack. But 40k miles after a simple rebuild, it shifted once oddly and then 2 mintues later, it locked in 1st and 2nd gear simultaneously and tried to tear itself apart; that was just a simple seal that went the 2nd time and with very little warning.