As Maverick said.
The growling PS pump is a sign that the pump is worn.
Our 95 has been making noise for years.....
Left knob on the radio pretty much adjusts out the noise
The only real fix is to replace the pump......
The extra speed required on the 1-2 shift is a TPS setting .
The throttle pressure the controller is seeing is a tad high and so the shift is late and probably a bit harsh too ????
If you set the TPS to reduce the throttle pressure then the line pressure drops off and this is not really good
"Throttle pressure"
What the controller thinks your throttle setting is (What you are asking the engine to do)
Getting this stuff all tweaked to perfection can be tough.....Always better to error on the side of a tad more T P than needed....
Too little T P and the clutches can start to slip during the shift....BAD JU JU
The original programming on these rigs was very good.....The 1-2 shift was firm yet not obnoxious ....Same with the 2-3 and the 3-4 .
The lockup on the converter was at about 45 mph at moderate throttle and was firm but again not obnoxious.......
A very harsh converter lockup is/can be rough on stuff......Firm is good and allows the converter clutch to engage without slipping ....Long "Mushy" drawn out shifts no matter which ones drastically shorten the tranny life.....
The old TH-400 in the earlier Burbs (1980's) had a vacuum control on the Injection pump that was supplied by a vacuum pump and fed vacuum to the Vacuum modulator on the trans to control the shifts.
Same sort of "Tail chasing" you are doing...../Only it was vacuum and hydraulics instead of electronics.....
We had a 1986 Burb K2500 with the 6.2 and it was a pain to get the shifts in the sweet spot.
From the factory that rig was always a tad late and harsh on the 1-2 shift.
I monkeyed with various ideas to get things the way I wanted.....The vacuum control valve was just not able to be adjusted to that narrow of an adjustment.......I finally replaced the modulator with an adjustable one and after many trips under the rig and tweaking the modulator I finally got that thing onto the happy place.
Still the entire set up used to artificially create and manage vacuum as it relates to throttle pedal position and what the operator was asking.....SKETCHY AT BEST But quite workable as long as you were not being fussy
Factory settings were a good compromise and generally worked fine....
Unless the owner was anal....Like me...
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