Tume an A727 to it's torque converter?

[1STMP]

Do I need a lower stall converter,
or can the 2-3 shift be
dialed in?
When building the chassis,
much of the weight was
guesswork and a torque
converter was purchased
to those numbers. It's
stall (advertised) is 2800
rpm. 440 has a mild cam
and the rear diff has 3:55's.
Total weight with two
passengers is 3100 lbs.
1-2 shift is strong at about
25-30 mph, but the 2-3
shift is wanting 45-50 mph.
it does shift before then but
you have to lift the pedal
slightly, and the shift is
soft.
Thanks in advance for
your input.

 

[Aron Gleason]

Do a full manual valve body, or a transgo shift kit.

 

[1 Wild R/T]

.
1-2 shift is strong at about
25-30 mph, but the 2-3
shift is wanting 45-50 mph.
it does shift before then but
you have to lift the pedal
slightly, and the shift is
soft.
Thanks in advance for
your input.

Sounds like tweaking the kickdown linkage would be a good starting point...
1-2 shift should occur at under 20 mph under light throttle... So 25-30 points to high TV (throttle valve) AKA kickdown pressure.. 45-50 2-3 confirms that... When you lift it shifts earlier because the kickdown pressure dropped... When it drops a soft shift is expected... Under heavier throttle firm late shifts are expected...

Shifts are a balancing act between line pressure, governor pressure & kickdown/TV pressure.... The easy adjustment is TV/kickdown so start there....