Hi blwn31,
I have exactly the same problem: newly rebuilt trans, pressures aren't OK. Yours seem to be just about high enough, but mine are still lower and not constant either. Even if I bolt the TV down at some stage I still get pressure flutter. I haven't had the time to take it apart yet, will do so probably next week or the following, just got a lot of exams coming on
Have you found something out yet?
I thought it would probably be the pump, because it's similar in all gears, that wouldn't be an internal seal inside the trans. I've just bought an old trans in need of a rebuild, gonna take that pump and see if it works.
My guesses as to what it might be:
- pump seal between the housing halves
- rough pump surface (my rotor broke last time so I guess that might have damaged the flanges)
- pump screws not torqued up to specs
I don't think that putting in stronger boost valves is going to help, because the flutter will probably stay (and BTW: I have a 13 vane rotor and stronger boost valve and a TV-style shift kit and my pressures are lower than yours...).
Just my guesses. We'll see. please let me know as soon as you find anything out, I'll let you hear once I've pulled my pump.
Best of luck,
Mad