Re: Twin Ultramatic Shifting

Posted by Eric Boyle On 2008/5/23 0:46:25

Ok, what you're experiencing is similar to my experience with my '56 Pat. What I did was change the fluid (using Type F), drive it about 500 miles, change the fluid again, drive it 500 more miles, change it again and drop the pan to clean out all the crap, clean the filter, then fill it back up with B&M Trick Shift, along with an additive that's only available at Ford dealerships, and may not be available anymore. It's a friction modifier used in the newer Ford vehicles that require Mercon V fluid. When they first come out with Mercon V, it didn't have this additive in it, so they had to sell it separately. Like I said, it may or may not still be available, as it was for a recall, but it sure as heck fixed pretty much all the shifting problems I had. I was working at said Ford dealership at the time, and had access to this more easily than the normal guy. If I had the foresight, I could have bought 5 or 6 more bottles, but I never did. Maybe this will help you.