Originally Posted by pcollins
Everyone who says "I flushed my trans and it stopped working" Didn't maintain it right in the first place and it was pretty much dead already.
If you read the OP , he just recently purchased the truck.
If it was not maintained properly to begin with , flushing could loosen but not remove deposits which could cause a failure.
The OP could change the fluid incrementally at every 10K which would help to negate any failure.