Shift kits.. do you really need one????

Bakerlite said
Sorry I don't agree, I think it's a better idea to understand how the trans functions and then select and fit the parts you need to allow the trans to function the way you want.
Just look at the Cup.. It's the perfect example of a piece that you may have to or not have to fit, It's also a piece that may not be the best size for your application or even the best way to reduce any bind up.. Because I see this as a fine tuning part, not just one you hammer into the hole and forget about.
Tell me Transman, have you ever just fitted a HP line pressure spring and drilled the sep plate on it's own? How much R&D stuff have you done on a Torqueflite with different springs and line pressures, pack clearances etc?

I was never a builder, but put almost 30 years in the transmission business. There are areas that I'm very familiar with and others not so. I did years back put a TF-2 in a TF727, followed the instructions and all worked as I expected it to. If you really want to know the why of the cup, contact the tech line at Transgo, they've got the experts there that will advise you why.
There are lots of smart people that have experimented with transmissions and made them work, and by the same token there's a ton of transmissions in the scrap heap because somebody didn't understand the how and why of how a transmission and all it's components all work together. Ask any good transmission builder how many butchered transmissions he's seen during his career with work done by someone who lacks knowledge.
There are things I have no problem doing on my transmission/car, but there are areas that I'd sooner leave to the good folks that truly understand what's going on and have the expertice to correct the problem.
If you wish to experiment, by all means, go ahead and do it. If it works, let us know, and if your experiment works better than Transgo, let them know what you did. One builder I know sent an idea he had on improving a Honda to Sonnax. They responded back to him, thanked him for his ideas and I believe are now giving him credit (should ask him if he got any $$) for the idea in one of their kits..