After a couple weeks and a thousand miles on the BG Syncro Shift II oil, we were very impressed with the results. Less shifting effort required to move the stick into gear than with Royal Purple and the brief hesitation as the synchronizers mesh together is greatly improved. The transmission snicks into gear a little quicker and the notorious 1-2 shift hesitation and grinding (especially when cold) is now virtually eliminated. Shifting across all other gears is now much quicker, more precise, and smoother.
Overall, BG Syncro Shift II was a significant improvement over Royal Purple in our MT-82, which was already a big step above the factory fill transmission fluid. There have been zero downsides to using Syncro Shift II and benefits can be seen across the board in every shifting aspect.
This is now my go-to gear oil recommendation for MT-82 equipped Mustangs and definitely worth a shot in any manual transmission that it meets the requirements for. Tim at OPMustang.com said that Tremec Transmissions, from T56 to Magnums and TR6060s have had great results by using Syncro Shift II and given his experience, I would have to believe him. Unfortuantely I won’t be getting that steak dinner.