Pulling the trans is indeed rather not something I look forward into doing, since it's mounted in an Abody and it's my daily driver.

A valvebody mod wouldn't be that hard, but since I installed the TransGo kit to the letter with the manual,
I'm afraid it might be just a patch to a leaky servo or something like that.
But ofcourse changing a spring is cheaper than buying billet servo pistons and such.