Automatic Tranny Leaking

[cantflip]

What does the kick down band adjusting screw adjust?

I have no books this old... so ignorant from the hip answer is throttle pressure. Your non-computer transmission uses several "control pressures" to time shifts... throttle pressure or vacuum pressure would relate to load. governor pressure relates to speed.

computer controlled later models only use one pressure "line pressure" and use sensors for the input. Before I am corrected the individual friction elements have their own solenoid which are pulsed to make apply pressure... which is what a band adjustment is making correct... sort of.

 

[cantflip]

View attachment 64981

Just saw it...WTF? Isn't that the front band? Its not like there is a "passing gear" I am confused by that terminology.

Oh... not FSM... incorrect terminology by my guess...

 

[commando1]

I have no books this old... so ignorant from the hip answer is throttle pressure. Your non-computer transmission uses several "control pressures" to time shifts... throttle pressure or vacuum pressure would relate to load. governor pressure relates to speed.

computer controlled later models only use one pressure "line pressure" and use sensors for the input. Before I am corrected the individual friction elements have their own solenoid which are pulsed to make apply pressure... which is what a band adjustment is making correct... sort of.

I'll wait for someone that knows.
Guesses don't help me. Thanks.

 

[70bigblockdodge]

It adjust the anchor point on the forward band/kickdow/passing gear/2nd gear, what ever you want to call it. It is the initial adjustment and to compensate for wear on the hardest working part in your torqueflite the forward band.

 

[saforwardlook]

First to second gear shifts are done by that band, and that adjustment times the shift, as 70bigblockdodge said to compensate for any wear. The two to three shifts are done with a clutch, so there is no direct adjustment for that. There is also a low/reverse band that can be adjusted too.

 

[commando1]

As the band wears, what is the result?
Shift hardness?
Shift timing?
Something else?

 

[DasBoot]

I recently did my gear selector seal on my Yorker. Pulled the pan and valve body and did it that way. Sure it was a waterfall of red coming out of the pan and all over the driveway, but I really couldn't get in there to A. pull the seal and B. clean the housing for the new seal.

I tried screwing a piece of threaded steel pipe into the seal (saw it on another forum) but it wouldn't bite into it.

I used the plain rubber pan gasket, no sealer of any kind. I flattened the pan holes with a ball-peen hammer and it doesn't leak a drop.

 

[tbm3fan]

I did that seal four years ago without that special tool but for the life of me I can't remember how I did it however it is done.

 

[saforwardlook]

As the band wears, what is the result?
Shift hardness?
Shift timing?
Something else?

The shift will be delayed slightly and there would be some slipping occurring (with some engine rpm increase or "runaway"), which will increase over time as it wears further, and then ultimately will not hold second gear.

 

[cantflip]

It adjust the anchor point on the forward band/kickdow/passing gear/2nd gear, what ever you want to call it. It is the initial adjustment and to compensate for wear on the hardest working part in your torqueflite the forward band.

The shift will be delayed slightly and there would be some slipping occurring (with some engine rpm increase or "runaway"), which will increase over time as it wears further, and then ultimately will not hold second gear.

Stan, I discussed this with briefly with a couple old transmission builders yesterday. The term "kickdown band' was familiar with them but they didn't have a definitive answer as to why the term... but common nomenclature to them. To steal a little of their explanation, in case it helps... "the band is simply the brake for the planetary gear set, it holds the drum to provide second gear"... the rest was guesses as to the terminology, which is what my question was about. Dave and saforwardlook are right on target regarding shift timing and potential slippage. Hope this was useful.

 

[cantflip]

I used the plain rubber pan gasket, no sealer of any kind. I flattened the pan holes with a ball-peen hammer and it doesn't leak a drop.

Careful torque and flatten the bolt holes... the old gaskets work well. Still cant beat the reusable, I never tried mixing and matching these gaskets... thanks to this thread I will go that way next time I do one.