Precision Industries or Circle D. Circle D has the best customer service. Precision is no slouch either.

 

The tripple disks have a "dare you to break it" warranty. He says if you break his tripple disk he'll replace it. With that said his converters have been in some badass machines, a 1500rwhp through an 80e vette comes to mind

 

don't forget Casey truck. 9 sec truck with 4l80 Circe D

 

I've seen multiple pics of PI 60E converters with broken hubs...not sure if they've corrected the problem yet...

 

I have Yank, I'll try Circle D next time just for the hell of it. Never heard a bad thing about either.

 

I hear good things about both, but I have never owned either of them.

Yank 3600 going in my truck in a few weeks.

 

I had a Pi Vigilante in a 60 e and broke a billet shaft. Never hurt the converter.

 

Probably too late of a reply, but fwiw I have the Circle D triple disc and LOVE IT! I'm very pleased with it's performance all around. I lock it at the track as well as occasionally tow with it.

Depending on your trans build/tune you may find the lockup to be a little harsh. I tuned mine out and it feels like stock cruising around (not sloppy but not harsh) and has a very nice engage when under power.

Chris was very helpful and stood behind his product. I will use him again. Good luck.

 

I have a friend that has a cam/bolt on f-body, 3.23's and has ran both with nothing else changed. THe yank pt4400 had a 1.57 60', and 1/4 was 11.62@ 116. THen he went with a circle d 230mm 5000, same weather, 1.57 60', and 1/4 was 11.72@ 115. No wheelspin on either. In his case the Yank was the more efficient converter.