The cure to your problem is a built AOD.
Just kidding man...
I'd check the u joints also....
If your d/s is a problem - I have one sitting in my garage from a 95 GT automatic (not sure if it'll work for you) that you can have...Its in fine condition...besides all the spider webs on it from sitting for a couple years.
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Current Rides: 2001 BMW 540i, 2002 BMW 330i (wife's car)
Previous Rides: 2001 Saleen Mustang SC Speedster Convt, 95 Mustang GT w/ Built 331/Vortech S Trim - 550rwhp, 93 Mustang LX Procharged 400rwhp, 99 SVT Lightning 475RWHP