Strange 1-2 Shift
Thread Starter
Teching In
Joined: Jan 2005
Posts: 18
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From: Port Orange Fl
Strange 1-2 Shift I have a 94 Corvette that just doesnt feel quite right on the 1-2 shift. The car has 70K on it. The problem is a bit difficult to describe but the following is the best I can do. Rather than the smooth continual feel of acceleration it feels as though the car pauses, lays down, or holds back for half a second before it makes the shift. When it does finally shift it seems fairly normal. It does this at all throttle settings. I tried increasing the line pressure and this causes the shift to firm up considerably (it chirps the tires this way) but doesnt really change the hesitation or pause at all. Suggestions? Explanations?
Has it been doing this for a while?
You could enlarge the second gear feed hole in the valve body seperator plate, decrease second gear accumulator travel, decrease second gear servo travel.
How were you increasing line pressure?
You could enlarge the second gear feed hole in the valve body seperator plate, decrease second gear accumulator travel, decrease second gear servo travel.
How were you increasing line pressure?
Thread Starter
Teching In
Joined: Jan 2005
Posts: 18
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From: Port Orange Fl
It really doesnt feel like a slip. It does it at even very light throttle settings with very little stress on the gear. And with the line pressure up it goes in hard enough to chirp the tires even at full throttle. I was increasing the line pressure electronically thru the ecm. I am not sure how long it has been doing it, I have only owned the car a few months, it has been this way since I bought it. I talked to a tranny man today that told me it sounds like a 1-2 flair. (flare?) Can anybody explain that to me?
Thanks, Roy
Thanks, Roy
Shift flare is when the rpm goes up during a shift, then go back down. The rpm should just go down.
Assuming everything is in good working order in the trans, a transgo shift kit will help.
Or just what I said above, decrease servo travel.You can do all the above with the shift kit.
Assuming everything is in good working order in the trans, a transgo shift kit will help.
Or just what I said above, decrease servo travel.You can do all the above with the shift kit.
Originally Posted by Fastmax
I have a 94 Corvette that just doesnt feel quite right on the 1-2 shift. The car has 70K on it. The problem is a bit difficult to describe but the following is the best I can do. Rather than the smooth continual feel of acceleration it feels as though the car pauses, lays down, or holds back for half a second before it makes the shift. When it does finally shift it seems fairly normal. It does this at all throttle settings. I tried increasing the line pressure and this causes the shift to firm up considerably (it chirps the tires this way) but doesnt really change the hesitation or pause at all. Suggestions? Explanations?
TECH Addict
iTrader: (8)
Joined: Sep 2005
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From: The beautiful Kingdom of Bahrain
Hello everyone. Im having the same exact problem right now. Found this surfing for a solution. I'm going to try overfilling it, cant hurt. Anybody else learn anything or fix thier problem another way?
