These parts didnt help much. First gear and transbrake pressed it has 175psi, 2nd and 3rd gear it drops to steady 125psi. Seems like its supposed to drop pressure like this. Maybe a time to try another vb?

sound like you have a internal leak ,i have made a adapter to my leakdown tester so i can test the ports in the trans (valvebody remowed) ,but that still not test the valve body
in the past i have a weak shift to third (turbo action vb)
and burned frictions ,change to a griner vb and that solved the problem ,have one teori about burnd frictions in 3rd
when you have tranbrake or highstall do not the converter dumps hot oil into the area of the directdrum ?
my trans was getting super hot in late rounds going bracketracing agains slower cars hade to whait at the tree at full stall (footbraking)
one time i cracked a clutchplate

Found out the problem, no internal leaks.

Pressure drop is an feature in this cheetah VB. I contacted them and it is supposed to work like this. Pressure drop is made to improve ET`s and first gear pressure makes the transbrake engage faster.

So what was the problem, and the solution?

Sounds like he's saying it was just low line pressure due to the design of the valve body to me.

get one from tranzact. best one i ever bought.

Thanks for the tip, i ordered a regulator spring from John at CRT.
It is a lot cheaper than new VB so worth of try. If it fails to work, i`ll have to order new VB.

New spring from CRT didnt help at this issue. Valve body seems to be calibrated to 125psi at 2nd and 3rd gear.

I just bought Griner VB from this forum. I am sure this will fix my issues.

Thanks for all replies.