Hi, well I took my time and rebuild my 90-92 700-r4. Still realized I made an error. There was a scratch where the pump rotor rides in the pump barely catch nail but I lightly sanded it out. Used a flat sand but didn't set no pump clearance. I used a straight edge to check and thought I would be fine. I didn't know I needed to even check that clearance.

Pre rebuild it seemed to have ok pressure but I was using hanyes manual and not the ASTG at the time. So i didnt test MAX tv pre-rebuild. Min TV pressure was in spec pre rebuild. So I thought if its not broke don't fix it. So it's still 10 vane and there was no visible damage to vanes. I hear sometimes aftermarket 13 vane upgrades break and I just wanted reliability.

So all I really did to the pump is seals/orings etc. added a .471 boost valve with the orings, Grinded down the PR valve land. Blocked off a hole in pump body all per transgo full SK700 kit.. the reverse boost valve remained stock.

After rebuild
COMPLAINT : MAX TV pressure readings are low when at operating temperature after driving not that long. It also shifts1-2 and 2-3 a bit later like 1800rpm light throttle. I did change a governor spring per trango instructions for the v6 governor weights, that's what was in there. But I think gov is only affecting wot shifts? The pressure in 2nd is 80psi wot and shifts to third pressure goes to 140 as it shifts.



It does appear to shift ok and hold the gears. Except no 2-1 downshift. I dont think i had that before rebuild though either. Fluid level is high. TV is properlly adjusted. 3-2 downshifts good. The rest of the trans seems fine. But I'm limited how far can drive it rite now without plates. So testing is done on my dirt road and can't get to 4th gear or lockup since I'm not getting those light throttle early shifts.

solution?
I don't know if I should try taking the easy way out and change to .500 boost valve and .300 reverse boost valve? Don't know numericly what kind of pressure increase I could expect from them. Or just pull it back out and replace the pump without wasting anymore time?

Attached is pic from my latest pressure test. It has pretty good pressure cold but one it warms up it drops substantially. ASTG manual doesn't say if the readings are taken operating temp or not? Hanyes values are lower but specify at operation temp.

Some rebuild information in case needed
used the solid teflon seals on stator and input shaft
Installed SK700 full shift kit from transgo
new transgo separator plate
raybestos clutches and kolene steels
the beast sunshell
Upgraded to molded pistons in 3-4
pinless accumulator 3-4
Added 3/4 load release springs (trimmed retainers)