A note on shift firmness/ shift points
Thread Starter
Drifting
Joined: May 2003
Posts: 1,730
Likes: 1
From: Charlotte NC
St. Jude Donor '05
A note on shift firmness/ shift points
Corvettes older than 1994 where equipped with a standard 700r4 or 4l60. The only electronic controls on these trannys is the torque convertor lockup. It is what you feel after the car shifts into 4th and what you feel unlock when you lightly tap the brakes going down the freeway.
Covettes 94 and newer come with a 4l60E where as shift points and firmness are controlled with electronic soliniods. Shift points and firminess are commanded by the PCM.
As trivial as this post might be for some I feel it is important as people are often disappointed when I tell them I cannot make the shifts firmer or move the shift points. Or on the other side of the coin people come to me with shift firmness/point problems when I really can't do anything if I tried to those things.
Covettes 94 and newer come with a 4l60E where as shift points and firmness are controlled with electronic soliniods. Shift points and firminess are commanded by the PCM.
As trivial as this post might be for some I feel it is important as people are often disappointed when I tell them I cannot make the shifts firmer or move the shift points. Or on the other side of the coin people come to me with shift firmness/point problems when I really can't do anything if I tried to those things.
Large Impressive Member
Joined: Jul 2003
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From: Good health is merely the slowest possible rate at which one can die
St. Jude Donor '04-'05-'06-'07
Have you always been in Charlotte? Or did you not have your location listed before? I'd have thought I would have remembered that if I'd seen it before. I'm just up the road near Hickory. Maybe I'll meet you at an event or something one of these days. 
Race Director
Joined: Oct 2001
Posts: 19,653
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From: Melbourne Florida
Cruise-In IV Veteran
Thanks Alvin...I, for one, didn't know the shift points couldn't be changed on my 93 by burning a new chip...I bought my car with 3:73's in the Dana 36...it always shifted at 5900-6000 at WOT...now I have a Dana 44 with 3:73's, a Transgo shift kit and a rebuilt tranny and it still shifts right at redline at WOT...I have no idea why but me likey...he he
Large Impressive Member
Joined: Jul 2003
Posts: 65,811
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From: Good health is merely the slowest possible rate at which one can die
St. Jude Donor '04-'05-'06-'07
Originally Posted by Alvin
Yep, sure am.
Let me know.. Me and the other are looking for a vette crowd to hang with in our off time. Both me and her have one.
Let me know.. Me and the other are looking for a vette crowd to hang with in our off time. Both me and her have one.
Le Mans Master
Joined: Feb 2002
Posts: 7,858
Likes: 2
What trick does Hypertech use on the 4L60E's in the 94 - 96 Vettes to get the shift firmness up with their Power Prgrammer? Which tables are they playing with? Main Line Pressure Table or Main Line Pressure Modifier Table?
