I had to install a new Delco power steering pump and it still whines a bit. I kinda like it as it almost sounds like a supercharger!! ha ha..
With the 3.8 and 4T65E it seems when trans gets real hot, hard shifts becomes the norm eventually.
Get the car scanned and dont be surprised if the dreaded P1811 shows itself. Mine did.
I think the valve bodies, solenoids & accumulator from heat eventually may build up varnish.
What I did firstly was to add a can of Seafoam Trans Tune to trans fluid: Trans Tune - Sea Foam Sales Company
With Trans Tune in took it on a 150 mile highway run & noticed a bit of a shifting improvement.
aprox 750 miles later I dropped the trans pan and used 1000 grit emery cloth to accumulator to bores, installed a the spacers & springs from a Transgo shift kit into the accumulator , and used Dexron VI (6) fluid.
TransGo 4T65E: SK 4T65E
That fixed the hard or harsh shifts & prevent having to remove the valve body /replace solenoids/ Updates etc. All is well now 30k miles later, not one more harsh shift again.