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recalibrating kickdown point on a TH 350
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dawg
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Location: Colebrook Connecticut
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PostPosted: Thu May 03, 2007 5:09 pm    Post subject: recalibrating kickdown point on a TH 350 Reply with quote

since ive changed my rear from 3:08 to 3:73 the kickdown has been acting funny.
Itll kickdown for 2 to 3 seconds then back?
with the 3:08 it would hold it until I let off the gas.
Im assuming that the modulator would need an adjustment.
also id like to move the downshift up some
example : it would not go into kickdown over 55 mph
anything under 55 it would kick down
id like to move the limit up to 65 if possible
maybe a govenor spring or weight adjustment?
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af2
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1933 Willys Coupe

PostPosted: Thu May 03, 2007 5:28 pm    Post subject: Reply with quote

Adjust the TV cable first. You might find that is all that needs to be done.
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10sec.et
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PostPosted: Thu May 03, 2007 5:33 pm    Post subject: Reply with quote

i assume youre referring to adjusting the detent cable. the modulator will control your upshifts and the detent will control your kickdown. theres a release on the cable end that you press to adjust. it basically makes the cable longer or shorter. you will have to try different settings to figure out what works best.
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af2 wrote:
It seems we can look at our magical Balls and come up with a fix?

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af2
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1933 Willys Coupe

PostPosted: Thu May 03, 2007 5:47 pm    Post subject: Reply with quote

10sec.et wrote:
i assume youre referring to adjusting the detent cable. the modulator will control your upshifts and the detent will control your kickdown. theres a release on the cable end that you press to adjust. it basically makes the cable longer or shorter. you will have to try different settings to figure out what works best.



Embarassed Thats what I meant.
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dawg
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PostPosted: Thu May 03, 2007 6:02 pm    Post subject: Reply with quote

but the cable was fine with my old rear in the car but since changing to a higher ratio 3:08 to 3:73
its doing as I mentioned above.
I dont think the cable has anything to do with the kickdown duration or when kickdown comes in.
the cable is properly adjusted to initiate kickdown at full throttle.
btw isnt a TV cable for 700R4 tranny?
this is a TH350
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af2
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1933 Willys Coupe

PostPosted: Thu May 03, 2007 6:27 pm    Post subject: Reply with quote

dawg wrote:
but the cable was fine with my old rear in the car but since changing to a higher ratio 3:08 to 3:73
its doing as I mentioned above.
I dont think the cable has anything to do with the kickdown duration or when kickdown comes in.
the cable is properly adjusted to initiate kickdown at full throttle.
btw isnt a TV cable for 700R4 tranny?
this is a TH350


TV is the 700. Detent is the 350 that's why I left the embarrass sign.

The kickdown will change on the detent cable because the throttle position between the 3.08 and 3.73 gears is different at the same given speed.
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Big Dave
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PostPosted: Thu May 03, 2007 7:04 pm    Post subject: Reply with quote

Unless I'm mistaken, and I often am, it works off the line pressure also so a spring change on the governor may be in order as well.


Big Dave
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af2
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PostPosted: Thu May 03, 2007 7:19 pm    Post subject: Reply with quote

Big Dave wrote:
Unless I'm mistaken, and I often am, it works off the line pressure also so a spring change on the governor may be in order as well.


Big Dave


The governator( as said in CA) works as up shift and doesn't let down shift until a given speed. The kick down is solely the detent and nothing more. The modulator also is in play on the up shift hence the different stripe color.
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10sec.et
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PostPosted: Thu May 03, 2007 7:58 pm    Post subject: Reply with quote

af2 wrote:
10sec.et wrote:
i assume youre referring to adjusting the detent cable. the modulator will control your upshifts and the detent will control your kickdown. theres a release on the cable end that you press to adjust. it basically makes the cable longer or shorter. you will have to try different settings to figure out what works best.



Embarassed Thats what I meant.



Laughing i was actually typing that at the same time you were. you just beat me to the post.

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af2 wrote:
It seems we can look at our magical Balls and come up with a fix?

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af2
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1933 Willys Coupe

PostPosted: Thu May 03, 2007 8:51 pm    Post subject: Reply with quote

10sec.et wrote:
af2 wrote:
10sec.et wrote:
i assume youre referring to adjusting the detent cable. the modulator will control your upshifts and the detent will control your kickdown. theres a release on the cable end that you press to adjust. it basically makes the cable longer or shorter. you will have to try different settings to figure out what works best.



Embarassed Thats what I meant.



Laughing i was actually typing that at the same time you were. you just beat me to the post.


It's about time I left at the light!!! Laughing
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dawg
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PostPosted: Fri May 04, 2007 5:38 am    Post subject: Reply with quote

ill re adjust the kickdown cable
its easy enough
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Paul P
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PostPosted: Sat May 05, 2007 11:47 am    Post subject: Reply with quote

You will need to adjust both the modulator and the kickdown cable to fix the issue. The lower gear has put less load on the motor changing the vacuum signal to the modulator.
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dawg
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PostPosted: Sat May 05, 2007 4:29 pm    Post subject: Reply with quote

ok I adjusted both and still its shifting too early
called the tranny shop and he has told me the govenor weights need changing aswell as springs
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Paul P
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PostPosted: Sat May 05, 2007 6:50 pm    Post subject: Reply with quote

There are 3 things regulating shift points the transmission looks at Engine Load (vacuum modulator), Road Speed (governor), and Throttle position(kickdown cable). Modulator will only affect low speed shift points. The link below will help you.
http://www.indianachevelles.com/newsletter/Sept06Newsletter/page2.html
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af2
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PostPosted: Sat May 05, 2007 7:43 pm    Post subject: Reply with quote

I thought we were talking down shift on this thread and am confused at this point? Must have missed something?
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