Powerglide Throttle Valve question.

I am running a powerglide behind my 6 in my T mod.

What do you have to do with this valve? i dont have any linkage for it to mount to the throttle or anything? Set it in one spot and leave it?

Any ideas, or anything would help.

thanks,

Aaron

 

Anyone show me what they did? just make it self adjustable?

Cable operated? ideas? i have herd of people toasting ******s for this not being right.

Aaron

 

What year Glide ? Does it have a vacuum modulator ? If it doesn't have a modulator, shifts are controlled by t.v., otherwise, t.v. is for kick-down.

 

i think its a 71... hmm ill have to post pics.

 

I'm not a trans guy, but I'll take a stab at this one since the trans guys haven't seen it yet ...


The throttle valve (or kickdown) linkage on a Powerglide is not critical, because they have a vacuum modulator that uses engine vacuum to control the fluid pressure within the trans. You may find that the shift points will be lower with the TV disconnected, but it shouldn't do any damage.


This is different from a TH700-R4, where the throttle valve setting is critical because it uses the throttle position to set the line pressure in the trans. If you run full throttle with one of these and the trans thinks you are only on part throttle, the low pressure will not apply the clutches as hard as it should and they will slip.

 

So long as it has a modulator (and it is hooked up) SimonSez is right on. Early cast iron units did not have a modulator, but if this is aluminum as a 71 would be, you should be fine.

 

it has an extra lever near the ****er connection going into the ******. like almost poart of it. that is the Throtle Position right?

So it is no big deal? if you move it it will move the shift points and how hard it shifts right? So theoreticly i could fix it right in the middle and kinda have the moddle of the road shifting?

I am not a ****** guy by any means, but if somone has some experience with this it would be nice.

 

the throttle valve linkage on the glide will delay the shift points if hooked up correctly.

The vacuum modulator raises and lowers internal ****** pressures

 

Okay I have heard alot of diferences on this since acquiring my Powerglide. I am running a aluminum one out of a 64 ElCamino. I talked to two different transmission guys that build powerglide for racecars. They both said you dont need vacuum in a powerglide. Vacuum only controls the quality of the shift. A pwerglide shift on off od pressure not vacuum. THe lever that is connected with the shift linkage is a shaft that is putting pressure on the clutch and tells it when to shift. He blocked my modulator off and mine shifts. It aint perfect but he said it wont be unless I hook up my linkage from the carburetor or If I want to manually shift it it will be fine. If you just want to get it going You will have to Set your lever back with something either being a fixed point rod or the cheap way being some wire. I hope this helps

 

From what I found out-I put a spring on the tv lever on my pg,when I was in my dragster.So that it was always pulled "on".The trans,when left to shift for itself,delayed shifting out of low at aprox.60mph.I could still shift it manually,from low,to high. When I put it in my sedan I did not connect it.,It shifts at about 20mph,however I can keep it in low for as long as I want,then shift it to high,or back to low whenever I choose. If you want it to shift to low when you floor it, you can build a throttle rod,to push/pull it on at full throttle. sparky