https://youtu.be/qEr8rbN8JiQ
This is how I have mine shifting now. That's a 1-2 shift, I don't have any good videos of how the other shifts behave, but the 1-2 shift is the hardest on mine. I'm using a Fairbanks 10518 kit, have the accumulator piston blocked, and the overdrive accumulator blocked as well. Interestingly my OD shifts aren't neck breaking or hard, but very quick. Line pressure is 100psi at idle and 190psi at WOT. 1-2 checkball and the reverse checkball are both removed, so it very enthusiastically goes into reverse now. 1-2 shifts chirp the tires audibly on smooth road. I have a billet front servo and billet steel rear servo, both made by superior, with a sonnax billet front servo cover. 6 raybestos red frictions in a 47RE front drum, 4 RR frictions in the rear clutch, carbon fiber front band, thrust washer kit to fix input shaft play, 9 raybestos GPZ OD direct frictions and 5 OD brake GPZ frictions. All Kolene steels. New OD direct snapring. Fresh bearings, shim kit. New governor solenoid and sensor. Strong front band strut and "power wedge". Spent around $1000 for the parts, since I had the OEM rear servo crack on me and shred the rear band and drum. Would've been $850 otherwise.
But yeah that's my transmission, and what I spent my spring break working on. I rebuilt it because I originally knew I didn't have much life left on the front band, but then the reverse went out due to that rear servo... So yeah I definitely needed to then. Everybody told me I was gonna mess it up because I'm 17. But I have 800 miles on it so far and it's running better than it was at the beginning of those 800 miles. Rowdyram knows his stuff though, I can tell. These transmissions are actually really well designed and can be built up to handle a ton, and share pretty much all the tricks and mods you see people doing to the old 727s.
