but its ok if the royal purple stuff has some friction modifier in it to you with torsen, as long as i don't add a separate bottle to it?

 

I have RP synchromax in my mt82 and it's great, it's been in there almost 3000 miles now and the shifting is far more smooth compared to motorcraft fluid.

I'm seein these posts talking about how some lubricant companies have not tested their fluid specifically on fords, well I believe it's pretty apparent that ford did not test the motorcraft tranny fluid in the mt82 either with all of the problems coming from the stock fluid

 

No problem at all. In fact I put f/m in mine when I changed the diff fluid prior to meeting up with Mark at Laguna Seca and talking it through.

Here's my write-up: https://themustangsource.com/f813/fi...e-pics-497224/