oil presure over flow problem?

[Green Beast]

i have a 4.0 it run great except the trans need a little work but the problem that concern me is the oil pressure and or flow will drop out when it is warmed up and hit between 2400 to 3500 rpm . any ideas or suggestion . thank you

 

[sledneck07]

im running about 50 - 55 psi at 2500 with a warm engine. also had the enging at 240 deg. and was running that 50 - 55 psi mark. the only time my pressure drops below 40psi is at a stop light and then is at 20 psi which is safe at idle. i dont think would should have any problems as long as you keep a quality oil in there.

 

[Green Beast]

can you change an oil pump on 92 4.0 without pulling the engine