1999 Mercury Sable Valve Body rebuild

Can the valve body (main control) be removed and replaced/rebuilt without removing the transaxle?
1999 Mercury Sable 3.0L 24V engine 135,000 miles Harsh 1-2 shift
Other shifts are smooth No leaks. Runs fine Have changed fluid and filter No slipping
I have researched this problem and it seems common. "Simple" fixes appear to be to replace valves and springs in the valve body. There is also a 1-2 Sonnax accumulator upgrade. All designed to fix harsh 1-2 shift. I bought the ATSG manual.
My question is, has anyone tried this before? Do these fixes improve anything? Can they be made without removing the transaxle for the car? I am researching only at this stage.
Thanks!
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Yes, you can change the valve body on these ATs by removing the pan and the filter. The filter attaches to the bottom of the valve body.
No idea whether this will solve your problem. Sounds like an expensive gamble; valve bodies aren't cheap.
When you changed the AT fluid and filter, was it a simple drain and refill? If so, 75% of the fluid was held back and not changed. If the fluid color is still dark brown (or worse) on the dipstick, and if your AT has a drain plug, try draining the fluid and refilling it a couple of times until the color approaches the bright red it should be. It may help. You can also try using Mercon V instead of the usual Dexron III/ Mercon.
Bob
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