shifter cable question
Thread Starter
Pro
Joined: Oct 2009
Posts: 679
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From: vero beach florida
shifter cable question
How do you adjust the down shift cable on a 92?
I just got the car and it shifts at about 3200 rpm and the other corvettes I drove all seem to shift in the low to mid 4,000 range.
I just got the car and it shifts at about 3200 rpm and the other corvettes I drove all seem to shift in the low to mid 4,000 range.
Le Mans Master
Joined: Aug 2000
Posts: 8,838
Likes: 31
From: Australia
It is not a "downshift " cable.It is the throttle valve cable (TV)
It controls all trans functions; set it wrong and you can torch your trans.
There is a set proceedure for correct adjustment and yours with ASR is different again which I don't have.
Put up another post asking for
"92 TV cable adjustment"
It controls all trans functions; set it wrong and you can torch your trans.
There is a set proceedure for correct adjustment and yours with ASR is different again which I don't have.
Put up another post asking for
"92 TV cable adjustment"
Pro
Joined: Mar 2008
Posts: 579
Likes: 2
From: High Bridge New Jersey
Pro
Joined: Mar 2008
Posts: 579
Likes: 2
From: High Bridge New Jersey
Race Director
Joined: Sep 2000
Posts: 17,298
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From: The Top of Utah
Probably not "controlled by the ECM.", except on 4L60E, electronically controlled transmissions, which don't have the TV cable. If there is a TV cable, there is a TV cable adjustment. Like Rodj said, it is not a "downshift " cable, nor is it intended to be used to adjust shift points or shift quality. The correct way to change or modify shift points are through the modification or calibration of the governor.
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Pro
Joined: Mar 2008
Posts: 579
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From: High Bridge New Jersey
Ok
Probably not "controlled by the ECM.", except on 4L60E, electronically controlled transmissions, which don't have the TV cable. If there is a TV cable, there is a TV cable adjustment. Like Rodj said, it is not a "downshift " cable, nor is it intended to be used to adjust shift points or shift quality. The correct way to change or modify shift points are through the modification or calibration of the governor.
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Thread Starter
Pro
Joined: Oct 2009
Posts: 679
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From: vero beach florida
Probably not "controlled by the ECM.", except on 4L60E, electronically controlled transmissions, which don't have the TV cable. If there is a TV cable, there is a TV cable adjustment. Like Rodj said, it is not a "downshift " cable, nor is it intended to be used to adjust shift points or shift quality. The correct way to change or modify shift points are through the modification or calibration of the governor.
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I would ask him, but I have called him so many times, I think he is getting ticked at me.
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Race Director
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From: The Top of Utah
The adjustment sets the proper relationship and coordinates the throttle position on the engine to the throttle valve in the trans. If you are familiar with the proper adjustment procedure on a non-ASR equipped car, you know that it isn't possible to adjust it too tight. Too loose and there may be insufficient operating pressure in the trans which can allow slippage and destruction of the trans. It is NEVER to be used to tailor shift quality or shift points, although on some transmissions it can have that effect.
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Race Director
Joined: Sep 2000
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From: The Top of Utah
Correct, but not. It tells the tranny were the throttle is positioned, so that it can shift at higher RPM's. Might not have worded that correctly, but that is what the mechanic at Roger's Corvette told me and he has been a vette mechanic for 20+ yrs or so he told me on the phone.
I would ask him, but I have called him so many times, I think he is getting ticked at me.
I would ask him, but I have called him so many times, I think he is getting ticked at me.
You got to love it! Another person asking for assistance, arguing with those whom offer well meaning, well informed, correct help. Why haven't you got this licked and helping others rebuild their transmissions?
RACE ON!!!
Pro
Joined: Mar 2008
Posts: 579
Likes: 2
From: High Bridge New Jersey
Now now
"Correct, but not." Really??? What is the "not" part? The rpm of the shift and the amount of hydraulic pressure applied to a shift is partially the function of the "throttle valve". An old, old, principle of automatic transmissions is that a down shift occurs when "throttle pressure overcomes governor pressure" And that an up shift occurs when governor pressure overcomes throttle pressure. On the 700R4/4L60 transmissions, reducing the pressure by manipulating the throttle valve can cause insufficient pressure for solid shifts. That can result in slippage which causes heat which can cook a trans. The proper way to alter shift points and quality is either through valve body modifications and/or governor recalibration. I still don't see what you parroted from "a vette mechanic" that you talked to "on the phone" that says "not".
You got to love it! Another person asking for assistance, arguing with those whom offer well meaning, well informed, correct help. Why haven't you got this licked and helping others rebuild their transmissions?
RACE ON!!!
You got to love it! Another person asking for assistance, arguing with those whom offer well meaning, well informed, correct help. Why haven't you got this licked and helping others rebuild their transmissions?
RACE ON!!!
