"one to four shift light"
Thread Starter
Instructor
Joined: Jan 2007
Posts: 208
Likes: 0
From: AH Illinois
"one to four shift light"
I have a 1993 coupe, six speed, tonight after driving for a while I was peacefully leaving a red light and I noticed a warning light I had never seen before flash on for a split second, just above the tachometer. It said "One to Four". I did a search and all i found was a C6 post about it. Does anyone have any experience with this light, and should it concern me?
Thanks for the knowledge.
Jack
Thanks for the knowledge.
Jack
Pro
Joined: Jan 2006
Posts: 667
Likes: 1
From: Centennial Colorado
Goto http://www.corvetteactioncenter.com/...ad.php?t=72323
Do a seach on 1 to 4
I have a Automatic, but everyone on this forum buys the kit to bypass this stupid feature...
Do a seach on 1 to 4
I have a Automatic, but everyone on this forum buys the kit to bypass this stupid feature...
Burning Brakes
Joined: Oct 2004
Posts: 898
Likes: 1
From: Pearland Texas
I have a 1993 coupe, six speed, tonight after driving for a while I was peacefully leaving a red light and I noticed a warning light I had never seen before flash on for a split second, just above the tachometer. It said "One to Four". I did a search and all i found was a C6 post about it. Does anyone have any experience with this light, and should it concern me?
Thanks for the knowledge.
Jack
Thanks for the knowledge.
Jack
Race Director
Joined: Oct 2005
Posts: 11,768
Likes: 175
From: Rolla Missouri
2021 C4 of the Year - Unmodified Finalist
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Sounds like he might already have the bypass installed. If not, you would actually feel the shifter not being allowed to go into 2nd whenever that light is on.
But even with the bypass installed, the light will still come on. You can safely ignore the light
Note: This is probably the number 1 mod manual transmission Corvette owners make. So, the chances are good that one of the previous owners has already by passed the CAGS.
But even with the bypass installed, the light will still come on. You can safely ignore the light
Note: This is probably the number 1 mod manual transmission Corvette owners make. So, the chances are good that one of the previous owners has already by passed the CAGS.
Pro
Joined: Mar 2005
Posts: 666
Likes: 0
From: Walton KY
I HATE the CAGS system. I have a 94 6 speed. When I first got the car I found myself actually grinding gears pretty often because when the shifter would not move it would throw off my timing or something. On the second attempt I would drop into second. It is a snap to put in just make sure to zip-tie it up from exhaust. The corner of mine is melted from sitting on pipes.
Le Mans Master
Joined: Dec 2006
Posts: 5,139
Likes: 482
From: H-Town Texas
This is the feature that keeps the gas guzzler tax away. GM installed this in order to meet EPA standards. The whole idea is that in "normal" driving you shift straight to 4th. This is supposed to keep the rpm's low thus saving gas. "The light will come on when the coolant temperature is higher than 120 degrees. You are goiong 15 to 19 mph and you are at 21 % throttle or less." -From the manual.
I tried it once and it is not pretty. To avoid this, a) make sure you are more than 21% throttle (not always possible in traffic). b) shift into second before the light comes on. c) when taking off, press down on the clutch until the light comes off. d) while keeping the clutch pedal down, quickly shift into fourth then to second (do not let up on the clutch).
You can get a bypass for your ecu, but I have been pretty successful avoiding problems with the above methods. It has absolutely no effect when you are doing any type of "performance" driving.
I tried it once and it is not pretty. To avoid this, a) make sure you are more than 21% throttle (not always possible in traffic). b) shift into second before the light comes on. c) when taking off, press down on the clutch until the light comes off. d) while keeping the clutch pedal down, quickly shift into fourth then to second (do not let up on the clutch).
You can get a bypass for your ecu, but I have been pretty successful avoiding problems with the above methods. It has absolutely no effect when you are doing any type of "performance" driving.
Thread Starter
Instructor
Joined: Jan 2007
Posts: 208
Likes: 0
From: AH Illinois
I appreciate all the info. I have owned the car for about a year and this is the first time I have even noticed it. It was while I was in traffic, leaving a red light. The car is not my daily driver, and I have never even noticed the light while at the track. I was just worried that there might be something wrong with the transmission or something, but you all have put my fears to rest. Again, thanks for the information.
Jack
Jack
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Burning Brakes
Joined: May 2006
Posts: 904
Likes: 0
From: Boynton Beach FL
This is the feature that keeps the gas guzzler tax away. GM installed this in order to meet EPA standards. The whole idea is that in "normal" driving you shift straight to 4th. This is supposed to keep the rpm's low thus saving gas. "The light will come on when the coolant temperature is higher than 120 degrees. You are goiong 15 to 19 mph and you are at 21 % throttle or less." -From the manual.
I tried it once and it is not pretty. To avoid this, a) make sure you are more than 21% throttle (not always possible in traffic). b) shift into second before the light comes on. c) when taking off, press down on the clutch until the light comes off. d) while keeping the clutch pedal down, quickly shift into fourth then to second (do not let up on the clutch).
You can get a bypass for your ecu, but I have been pretty successful avoiding problems with the above methods. It has absolutely no effect when you are doing any type of "performance" driving.
I tried it once and it is not pretty. To avoid this, a) make sure you are more than 21% throttle (not always possible in traffic). b) shift into second before the light comes on. c) when taking off, press down on the clutch until the light comes off. d) while keeping the clutch pedal down, quickly shift into fourth then to second (do not let up on the clutch).
You can get a bypass for your ecu, but I have been pretty successful avoiding problems with the above methods. It has absolutely no effect when you are doing any type of "performance" driving.
Although I do notice I get stuck doing 1-4 when I'm leaving a red light and making a left turn, with a car in front of me. Just always seems to be the case when I'm ready to go into 2 the CAGS system is telling me to go to 4... oh well.
Burning Brakes
Joined: Dec 2004
Posts: 918
Likes: 5
From: Gainesville FL
Does the automatic 1-to-4 shift only apply to automatics or to manual transmissions as well? I have never seen this light come on in my 89 with the 4 speed automatic. If someone has already disconnected the plug at my transmission, does the dash light still come on (but no 1-to-4 shift occurs) or does unplugging the connector disable both the dash light and the actual shifting? I've been curious about this for a while.
Race Director
Joined: Dec 2002
Posts: 13,348
Likes: 233
From: SCMR Rat Pack'r Charter Member..Great Bend KS
Sounds like he might already have the bypass installed. If not, you would actually feel the shifter not being allowed to go into 2nd whenever that light is on.
But even with the bypass installed, the light will still come on. You can safely ignore the light
Note: This is probably the number 1 mod manual transmission Corvette owners make. So, the chances are good that one of the previous owners has already by passed the CAGS.
But even with the bypass installed, the light will still come on. You can safely ignore the light
Note: This is probably the number 1 mod manual transmission Corvette owners make. So, the chances are good that one of the previous owners has already by passed the CAGS.
Larry
code5coupe
__________
I ain't easily impressed....
Last edited by rocco16; Mar 28, 2007 at 05:06 PM.
Le Mans Master
Joined: Jul 2001
Posts: 8,183
Likes: 3
From: Santa Maria, CA
It would be cool if you crawled under the car(after it is safely and securely elevated) to see what is going on under there.
Have a looksee on the driver's side of the trans and look for the cylindrical shaped solenoid sticking out of the center.
Mine has the wires completely cut-off
Yours could be unplugged or it could have the aftermarket inline bypass installed.
Have a looksee on the driver's side of the trans and look for the cylindrical shaped solenoid sticking out of the center.
Mine has the wires completely cut-off
Yours could be unplugged or it could have the aftermarket inline bypass installed.
Racer
Joined: Jan 2007
Posts: 416
Likes: 2
From: Aquilla TX
I nnoticed this feature in my car manual but have never seen this light come on, I guess its disconnected or else I rev it up past where this feature works in first gear, I have never noticed it light up on my dash in my 95 vette
Cruizer
Cruizer
