we have 2009 SST EVO 380HP it had transmission slipping problem

I bought SSP Overhaul kit I install the kit , after installing the problem became worse I contact SSP asking for my problem, and they said you have oil press leak problem, we ordered a new OEM Internal Clutch Basket Seals from SSP to be sure that we have no problem again
we install every think and I made a tool to check for leaking the basket leaking was 0 , and than I check is there is leaking from mechatronic to the basket ,also I hear the basket piston working sound , but I still have slipping !!!!
-I increased the oil press to the clutch, That helped 30% but it still slipping
-I update the TCU software and learned the clutch it improved also 30% but still slipping
-I took out the basket and check the thickness , I found that SSP clutch thickness (5 Plate 4 disc) 17.6 mm the old disc that I took out was 18.04 mm
-at the end I install the clutch set ( 4 disc and 3 (2.0mm plate) and 2(2.2 mm) Plate) total 17.85mm now the transmission only slip at high boost

what is the problem, could some one tell me how much should be the thickness of the clutch set (5 plate+4 disk)

Regards

 

I made the thickness 18.2mm but with no luck, I still have the slipping problem
and I get Error code P180C :Clutch pressure cut spool sticking