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  #1  
Old 05-13-2011, 10:10 AM
silversaddle silversaddle is offline
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Wide Open Throttle pressurizes the Transmission?

The transmission guy said he didn't think I was getting full throttle. Which meant that the transmission might not be getting pressurize correctly.

I understand that the linkage at the carburetor activates the transmission kick down for passing gear. I know I need to adjust it.

But I also know that when I converted to Howell TBI I made sure the throttle pedal fully opened the throttle body.

How does full throttle pressurize the transmission?

If the butterfly valves are opened to the max, what other mechanical adjustment would contribute to pressurizing the transmission?

Is there something I'm over looking?
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Old 05-13-2011, 10:11 AM
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cajun_lad cajun_lad is offline
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With the throttle at the wide open position, the kickdown lever should be all the way forward.
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Old 05-13-2011, 10:21 AM
silversaddle silversaddle is offline
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Sounds simple enough.

Thanks...
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Old 05-13-2011, 01:14 PM
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Uh

Time for a new transmission guy.
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Old 05-13-2011, 01:55 PM
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Tranny guy is OK, maybe not articulating it right, the lever position besides kick down tells the tranny to run higher pressure to the servos clamping the bands tighter as throttle is opened. (raises the shift points and claming pressure)
(700r4 are really stinky about having the cable/link set right or they trash themselves)
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Old 05-13-2011, 05:25 PM
silversaddle silversaddle is offline
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Quote:
Originally Posted by mdill
Tranny guy is OK, maybe not articulating it right, the lever position besides kick down tells the tranny to run higher pressure to the servos clamping the bands tighter as throttle is opened. (raises the shift points and claming pressure)
(700r4 are really stinky about having the cable/link set right or they trash themselves)


I thought that might be the case. I think he was just trying to explain that the linkage does more that just down shift. However, the only way to fix it is to be sure it actually kicks it down under full throttle, right?

Or is there more to adjusting it besides what cajun_lad said?

(i.e. With the throttle at the wide open position, the kickdown lever should be all the way forward.)
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Old 05-13-2011, 05:46 PM
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serehill serehill is offline
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Well

Mine kicks down @ about a little less than 3/4 throttle. Waiting until full throttle would be too late.
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Old 05-13-2011, 06:36 PM
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Quote:
Originally Posted by silversaddle
I thought that might be the case. I think he was just trying to explain that the linkage does more that just down shift. However, the only way to fix it is to be sure it actually kicks it down under full throttle, right?

Or is there more to adjusting it besides what cajun_lad said?

(i.e. With the throttle at the wide open position, the kickdown lever should be all the way forward.)

This is correct. You should not be able to move the tranny linkage any farther forward when the throttle is wide open.
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Old 05-13-2011, 07:01 PM
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serehill serehill is offline
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HMM

I might have to double check mine. The kick down should be at about 3/4 throttle right??
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Old 05-13-2011, 07:03 PM
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That sounds about right.
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Old 05-13-2011, 07:23 PM
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Eaglefreek Eaglefreek is offline
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I'm assuming since you have an 89 you have a TF727. Torqueflites don't have a "kickdown", it is a throttle valve rod. It controls pressures in the transmission and it's adjustment is critical for proper shifting and longevity of the transmission. Here's a good write up on adjustment: http://www.off-road.com/jeep/feature...ine-12057.html
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Old 05-13-2011, 07:29 PM
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^^ X2. that rod controls the shifting and balances the pressures inside the tranny for normal operation. Kinda like a vacuum modulator on a th400.
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Old 05-13-2011, 08:15 PM
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Cool

Quote:
Originally Posted by Chevelleguy
That sounds about right.

Thanks Dave
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  #14  
Old 05-14-2011, 10:11 AM
silversaddle silversaddle is offline
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Quote:
Originally Posted by Eaglefreek
I'm assuming since you have an 89 you have a TF727. Torqueflites don't have a "kickdown", it is a throttle valve rod. It controls pressures in the transmission and it's adjustment is critical for proper shifting and longevity of the transmission. Here's a good write up on adjustment: http://www.off-road.com/jeep/feature...ine-12057.html

Quote:
Originally Posted by thinder
^^ X2. that rod controls the shifting and balances the pressures inside the tranny for normal operation. Kinda like a vacuum modulator on a th400.

Is this an easy adjustment, or do I need to send it back to the tranny guy?

Keep in mind that I no longer have a carburetor. Howell TBI has been installed.
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Old 05-14-2011, 10:23 AM
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Easy adjustment. If you look in a chiltons manual it should tell you. Essentially, at WOT you must be at full pull of the cable or push of the rod, depending on your setup. TBI shouldnt affect it, I have a cummins in mine
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  #16  
Old 05-14-2011, 05:01 PM
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Quote:
Originally Posted by thinder
Easy adjustment. If you look in a chiltons manual it should tell you.

Or look here:

http://www.ifsja.org/tech/transmission/727adj.html
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