95 Chevrolet going on 4th transmission
 

Good morning All,
Just inquiring as to if anyone would have any ideas or feedback regarding the issue.
95 Chevy Z71 now at 281000 miles.-.
Trans issues: The first was replaced roughly mile 97913(1st) had some trans work done but not an overhaul at 186067. rebuilt put in 243660(2) and again between 243660 and 281000 miles now(cant find the paperwork for exact mileage) has had another rebuilt..(3rd) Its currently in the shop to see whats wrong with this one..(will not shift past 2nd).
Trans 2 and 3 were on non stock tires..not sure about the first(on bigger mud tires of course) 33's now
My Question is this truck is now possibly going on its 4th transmission.-Any ideas what would cause so many trans issues..the last on not even 40,000 miles.
Any ideas would be appreciated

Those 4l60e suck my dad has and three done in a Tahoe