I am installing the small(green box) Transgo kit in my tranny, the only valve it came with is the throttle valve. I purchased a .500 boost valve also, should I put a new low reverse valve in at the same time? I noticed that the big kit from Pro-Built includes the low/reverse valve, as well as a larger boost valve.

 

Measure the intermediate/reverse boost valve and see what diameter it is? It should be .282. If it is or if it is larger than this, you are ok, unless you do a lot of manual shifting, then I would go to the .296 boost valve. By the way I would add the Corvette servo, while doing this, it will help firm up 2nd and 3rd gear.

 

Thanks, I usually just let the tranny shift itself anyway. I already have the Vette servo installed.