Quote Originally Posted by XX7SANDMN View Post
just done that i used a97 to 99vt 5lt turbo 700 flex plate to my t400 no worries it appeared to be slighty thicker metal so maybe stronger as well
You may have had a trimatic plate. I think the original TH400 plate is the same as the 4L60/4L60E one from VN-VSIII.