4R70W I'll try and describe what it is doing as best possible, it's in a 97 t-bird with 95k on it. At 60k I had the t-converter replaced and have drained pan and t-converter fluid and replaced 2x since then.
I'm driving say 50 or 60 and let off the gas to slow down to maybe 15-40mph then when I put the gas back on it seems to stumble and not want to "go into gear" for a few seconds. I usually let off the gas and give it gas again and it seems ok.
Doesn't happen all the time maybe once or twice on my 23 mile commute.
I have tried torquing down the valve body bolts, no change...
It isn't the Torque Converter issue, I've been through that and know what that is like
All AOD-E's and 4R70W's are prone to MLPS issues. The updated MLPS is just a "stronger" design. After all it is just an electrical switch sitting out in the elements.
Currently In the Short Bus Garage:
2 - '94 T-bird LX's 4.6L (one with 300,000+ miles and one with 200,000+ miles)
1 - '97 Mark VIII LSC - INTECH V8 (120,000+ miles)
1 - '97 F150 XLT 4x4 Flareside, 4.6L (130,000+ miles) - Currently being dismantled and rebuilt with upgrades!
1 - '00 Mustang GT (likes to accelerate with the brake on!), 4.6L (60,000+ miles - only comes out when I need to get somewhere fast.)
My way of looking at it is after 100,000 miles any component is subject to failure with no warning. Some electronics don't last that long. The early mlps did not have a seal to protect it from moisture so they failed quickly, especially in environments that had salt etc...
They are all basically the same otherwise.