TransGo® has been improving automatic transmission Performance Control and Durability for ever 35 years. If you want performance shifts, more firmness, Shift Control and Durability using normal hand tools and without removing the transmission, do what the professional mechanic has been doing for over 35 years...INSTALL TRANSGO

A transgo kit can be put in a 700R4 tranny without removing the tranny?

 

yep

 

Just wondering if tranny removal is needed/necessary

 

Shift kits are pretty basic to install with the trans in the car.You'll need to drop the pan and remove the valve body.(Hope you don't mind bathing in ATF)For me the toughest part is holding up the valve body with one hand and starting the bolts with the other,so it might be easier with some help.
It's easier with the trans out, because you can turn it upside down, but I've done it both ways.
-Rich-

 

the trans-go comes with a really good video that shows you step by step what to do...doesnt look to hard i just havent got around to it yet mines still sitting in the box in my room