Gerald Morris
Senior Member
Since Summer is here and the time is right for stalling in the streets, I too need to post some 727 blues in hope a righteous Torqueflite Master can inspire me with Right Knowledge.
For some months, I've been experiencing 2-3 flare-up at around 33-35 mph, which has now degenerated to major slipping, BUT:
In HOT weather, after a mile or 3, 3rd starts to catch. After noting this was somewhat better when using Type F in my sieve/transmission, which I re-snugged the pan bolts to 12.5 ft-lbs on to reduce the leak, I poured 24 oz of Lucas transmission fluid additive in, and happily report that once warmed up, Mathilda grips 3rd gear well enough to permit me to putt around in "D" without manually dropping down to 2nd gear.
Having read the FSM, and a couple Torqueflite eBooks online, I'm weighing the hypotheses that
1.) the clutches are gone, and only fricative additives in Type F and more in Lucas are permitting the steels to work with the clutch remnants
versus
2.) The forward band is loose as a goose and tightening this and adjusting pressure to the forward servo will pop 3rd in a bit more forcefully and suffice for the summer
versus
3.1 and 2 BOTH are correct.
I can drop the pan, change the filter and diddle the front band (external adjustment, right?) and pressure to the servo easily enough, but if I need to pull it for a rebuild/replace, then I need to go tool shopping. I also have a 1977 727 w a 400, but for that I need a 0 balance torque converter for my excellent old 383 especially since the old converter is doubtless 19 spline.
My major question is: WHY DO I JUST GET 3RD GEAR WHEN THE TRANNY HAS WARMED UP TO ABOUT 200 Fahrenheit?
For some months, I've been experiencing 2-3 flare-up at around 33-35 mph, which has now degenerated to major slipping, BUT:
In HOT weather, after a mile or 3, 3rd starts to catch. After noting this was somewhat better when using Type F in my sieve/transmission, which I re-snugged the pan bolts to 12.5 ft-lbs on to reduce the leak, I poured 24 oz of Lucas transmission fluid additive in, and happily report that once warmed up, Mathilda grips 3rd gear well enough to permit me to putt around in "D" without manually dropping down to 2nd gear.
Having read the FSM, and a couple Torqueflite eBooks online, I'm weighing the hypotheses that
1.) the clutches are gone, and only fricative additives in Type F and more in Lucas are permitting the steels to work with the clutch remnants
versus
2.) The forward band is loose as a goose and tightening this and adjusting pressure to the forward servo will pop 3rd in a bit more forcefully and suffice for the summer
versus
3.1 and 2 BOTH are correct.
I can drop the pan, change the filter and diddle the front band (external adjustment, right?) and pressure to the servo easily enough, but if I need to pull it for a rebuild/replace, then I need to go tool shopping. I also have a 1977 727 w a 400, but for that I need a 0 balance torque converter for my excellent old 383 especially since the old converter is doubtless 19 spline.
My major question is: WHY DO I JUST GET 3RD GEAR WHEN THE TRANNY HAS WARMED UP TO ABOUT 200 Fahrenheit?