I have a 2003 Lincoln LS can the ECU Computer make the transmission run Harsh shift down hard?

SOURCE: lincoln ls shifts hard into reverse

You will have to have the solenoid body replaced in the tranny and have the PCM reprogrammed.

SOURCE: I have a 2003 Lincoln LS V8. shifting shuttering

IS IT MORE BETWEEN 20-50MPH..IF SO THEN THERE IS 3 TSB FOR REPROGRAMMING THE PCM. LET ME KNOW IF ANY OF THIS WILL HELP
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SOURCE: 2003 lincoln LS

usually shift kit makes for harder shift also verify engine is well tuned.

SOURCE: 2004 Passat 1.8T tiptronic automatic harsh down shifts

My 2004 Passat 1.8T 4motion has the same problem. Took it to the dealer. I thought it might be a software issue as there was a service bulletin for a similar issue registered at the NHTSA.gov website. They claimed they did all the sensor checks and found nothing. Then they said the tranny was shot and for a mere $5,000 I could have a new one. I begged to differ so I called VW itself and described the issue. Their customer service rep was not even up to the type of car this was and had no idea about what I was inquiring. Those people are trained to be obstructionists by VW. I tried to get this problem elevated to a higher level and was told they were the end of the line. Sadly we're on are own with this manufacturer. They simply deny, deny and deny. I'd suggest you lodge the problem with the NHTSA under defect investigation. Maybe some day they'll find it was a design or manufacturing flaw, just like their coil issue.

SOURCE: 2003 Lincoln LS transmission shifts

Replace the Solenoid Pressure Control Pack
inside the trans pan

Remove the bottom pan
Remove the filter
Remove ( 1) 10mm bolt holding
wiring harness
Remove 7 bolts holding Shift Pack

HPN-9L2Z7G391A $515.30 List /$332.20 Wholesale,
that is at the trans parts supply house

Don't even go to a Lincoln Dealer --say no more

Do not use the car until resolved,SAVE The Trans