i have the transgo shift kit i installed but i would like to know the size,did the
boost valve assembly that came with the kit is it a .471 or a .500 i would like to frim up my shifts a little

 

mine came with a .500 but i asked for it...I know PRO BUILT would know the answer to this. Dana should be lurking around here, PM him. I'd like to know myself...like I said, i'm only an amature at this rebuild stuff-I just built my 13th 700R4 last night.

 

I built mine but i used the alto reds 3-4 clutch pick,but i found out those
are not good,also jegs has a .570 boost valve $33.99

 

If the kit is from TransGo, it will have the .500" main boost valv and the .300" intermediate/reverse boost valve also.

 

dana how do you firm up fourth gear?will your kit help.

 

The kit Performance Shift kit from TransGo for the 700R4 has the 4th gear modifications for a firmer 4th gear. You can go larger than the stated .155" feed hole for the 4th gear feed hole in the separator plate. I use .187" - .204". TransGo used this size in previous kits a few years ago. I would only do this modification that I suggest with a 10.5" or smaller diameter torque converter.

 

I will open the feed hole like you said because i have the continental 10 inch
non lockup converter