Talk to the engineers at Tremec. They know the trasmission best. Scott Hoag was the program director for the Bullit and Mach1 programs and he's spoke directly with Tremec about this.
The short version: If the stops are set incorrectly, or vary after to a conservative setting, the transmission will not be fully engaged.
The 3650 has internal stops.
But, what do the guys at Tremec and Scott Hoag know about Mustang trannys...... :LAUGH: :LAUGH: :LAUGH:
Here's the OFFICAL TREMEC ANSWER... See second techincal question:
http://www.ttcautomotive.com/English/faq/faq.asp#15