Can I use LubeGaurd in my Tranny

From : michael

Q: hi everyone i just posted a question the other day about tranny problems i appear to be having...i changed out my fluid and put the atf type 3 made for my tranny. my van is a 1995 dodge 2500 series with the rh32 transmission. im not sure but there appears to be a shudder not heavy but enough to be annoying under hard accelration and while cruising at like 55 to 70 miles per hour. i did look under the vehicle and did notice that there is play where the universal slips into the transmission tailshaft. my question. i have heard that lubegaurd can help with this shudder and im wondering if i could put a bottle of it in my trasmission. i have heard so much about putting the wrong fluid in that i dont want to do any other damage if any. i also heard there was a product called instant shudder stop. where can i get any of this and should i put that in....any help is greatly appreciated sincerely mike long island ny .