727 trans problem

Bummer. I've heard of them cracking/breaking and I've rebuilt several tq's but I've actually never seen one broken or cracked. Why did you pull the trans? You can replace the rear servo piston assy. without pulling the trans. Admitedly the rear band strut isn't real easy to get back in but it can be done.

BTW: Don't buy Sonnax crap. I recently bought a Sonnax Billet rear servo piston for the first time for a 727 I was rebuilding because their price was good. It was JUNK. It was made about .030 too small (this was measured against the old piston that was probably worn down some) and was so sloppy in the bore when I put it in it would **** sideways real easy.