727 shift question

[Dodgerdallas]

Just got my 66 up and running,changes Trans  filter and fluid,when I take off its a little late amd hard shifting into 2nd. I've worked w a lot of Chevys and their Trans has a vacuum valve to help shift-does mine have something simular or could it be something else?

[randy73]

Is your linkage adjusted correctly, linkage should start to move as soon as the throttle moves?

Have you verified you have not overfilled the fluid?

[Dodgerdallas]

The fluid is ok and the linkage doesn't move till the passing gears hit

[Dodgerdallas]

The shifter linkage is fine slso

[cdr]

the linkage should have a spring pulling it all the way forward against the carb linkage

[Dodgerdallas]

Ok I have 2 springs both Goin to the carb linkage,one of them needs to hook to the passing gear? ( I assume that's what it is).

[cdr]

like this

[Dodgerdallas]

It's a little hard to make out on this phone-I'll check it out once I get home on my laptop- thanks

[BSB67]

[cdr]

thanx bsb67 that was the only pic i could find

[Dodgerdallas]

Sorry
I'm so clueless but what does the spring do?

[cdr]

if the spring is not pulling the linkage the trans thinks that you are pushing on the gas pedal,so with the linkage pushed back the trans line pressure is higher,the travel that it moves controls line pressure & shift points,

[Dodgerdallas]

Ok that's explains a lot,thanks I'll try er in the morning.

[cdr]

you are welcome ,let us know

[John_Kunkel]

To simplify, the slot in the top link needs to be pulled up snug against the carb stud at idle and the linkage needs to move rearward as soon as the throttle is opened.

The farther back the linkage is at any given throttle setting, the later and firmer the shift will be.