Cags...
Thread Starter
Intermediate
Joined: Apr 2007
Posts: 37
Likes: 0
From: Ellicott City MD
Cags...
I have a 07 6sp, Z51 manual on order and I am reading more about CAGS but don't quite understand how it actually works.
This is my first vette and when I test drove it I did not punch it and was able to shift into 2nd and 3rd.
Did CAGS electronically change me to 4th and not 2nd?
Please fill me in.
Thanks.
Farley
This is my first vette and when I test drove it I did not punch it and was able to shift into 2nd and 3rd.
Did CAGS electronically change me to 4th and not 2nd?
Please fill me in.
Thanks.
Farley
Le Mans Master
Joined: Oct 2004
Posts: 8,615
Likes: 60
From: Haymarket Virginia
Congats on the order!
It actually blocks 2nd so when you pull the shifter down it slides it to the right into 4th! I think you have to be less than 20% throttle and under 15MPH? Someone will come in and tell you the right info!
It actually blocks 2nd so when you pull the shifter down it slides it to the right into 4th! I think you have to be less than 20% throttle and under 15MPH? Someone will come in and tell you the right info!
Safety Car
Joined: Jun 2004
Posts: 3,563
Likes: 2
From: Dallas Tx
Only in very specific throttle and load conditions will it force a 1 to 4 shift. It will very rarely ever happen and easy to disable. 50 cent resistor from Radio Shack stuck in the CAGs connector.
Team Owner
Joined: Mar 2001
Posts: 24,592
Likes: 44
From: The Rock Arkansas
Elite Member
Cruise-In III Veteran
CAGS (Computer Aided Gear Shift) has been around since the C4 on the Corvette. If you try to shift under approx 1,800 RPM, a solenoid will lock out the second gear gate and force you to shift into 4th gear.
There are several ways to defeat CAGS. You can buy a CAGS defeater, pull a fuse or just accelerate above 1,800 RPM. I never bothered to disable it on my C5 because it just didn't bother me. For alot of people it's a "mental" thing.
There are several ways to defeat CAGS. You can buy a CAGS defeater, pull a fuse or just accelerate above 1,800 RPM. I never bothered to disable it on my C5 because it just didn't bother me. For alot of people it's a "mental" thing.
Team Owner
Joined: Aug 2002
Posts: 35,617
Likes: 167
Tech Contributor
Cruise-In 11 Veteran
NCM Ambassador
St. Jude Donor '05-'06-'07-'10
As Doughan indicated the Computer Aided Gear Selection has been around for a while. The shift pattern that it is designed to emulate is specific to the automakers testing for its Corporate Average Fuel Efficiency number (CAFE requirement) The automakers are given a set pattern of driving that the car must be tested under. The CAGS is solely to aid their overall average fuel econonmy and avoid a gas guzzler tax. The circumstances in which it will operate are very specific:
One-to-Four Shift Light
(Manual Transmission)
When this light comes on,
you can only shift from
FIRST (1) to FOURTH (4)
instead of FIRST (1) to
SECOND (2).
You must complete the shift into FOURTH (4) to turn
off this feature. This helps you get the best possible
fuel economy.
After shifting to FOURTH (4), you may downshift to a
lower gear if you prefer.
Notice: Forcing the shift lever into any gear except
FOURTH (4) when the 1 TO 4 SHIFT light comes
on may damage the transmission. Shift only from
FIRST (1) to FOURTH (4) when the light comes on.
This light will come on when:
• The engine coolant temperature is higher than
169°F (76°C),
• you are going 15 to 19 mph (24 to 31 km/h) and
• you are 21 percent throttle or less.
One-to-Four Shift Light
(Manual Transmission)
When this light comes on,
you can only shift from
FIRST (1) to FOURTH (4)
instead of FIRST (1) to
SECOND (2).
You must complete the shift into FOURTH (4) to turn
off this feature. This helps you get the best possible
fuel economy.
After shifting to FOURTH (4), you may downshift to a
lower gear if you prefer.
Notice: Forcing the shift lever into any gear except
FOURTH (4) when the 1 TO 4 SHIFT light comes
on may damage the transmission. Shift only from
FIRST (1) to FOURTH (4) when the light comes on.
This light will come on when:
• The engine coolant temperature is higher than
169°F (76°C),
• you are going 15 to 19 mph (24 to 31 km/h) and
• you are 21 percent throttle or less.
Thread Starter
Intermediate
Joined: Apr 2007
Posts: 37
Likes: 0
From: Ellicott City MD
Thanks for all the info. I almost never shift below 2500 RPM's in my 96 Mystic Cobra so this should not be a problem and if it is I will just buy a CAGS eliminator.
The wait is killing me on my order, not supposed to get my AO vette till end of May/Early June. It's driving me up a wall.
Farley
The wait is killing me on my order, not supposed to get my AO vette till end of May/Early June. It's driving me up a wall.
Farley
Race Director
Joined: Dec 2006
Posts: 11,762
Likes: 2
If it becomes a bother you can always disable it via a tune. That's what I did. Or you can spend $20 and get the plug in harness eliminator. But there was a post yesterday saying you can remove the MAN TRAN SOL fuse which will also turn it off. Not sure about the validity of that claim so don't hold me to it. You can always drive it like you stole it and CAGS will never kick in. Unfortunately for me I live in a downtown area so that becomes next to impossible.
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Team Owner
Joined: May 2004
Posts: 82,175
Likes: 1,319
From: McKinney TX
St. Jude Donor '21-'22-'23-'24
All 3 owner's manuals (2005, 2006, 2007) say that fuse is for manual transmission solenoids. Hopeful owners really need to wait to see if it also disables the accidental shift to reverse solenoid.
Safety Car
Joined: Jul 2001
Posts: 4,456
Likes: 6
From: Spicewood, Texas, USA TX-Texas
If it becomes a bother you can always disable it via a tune. That's what I did. Or you can spend $20 and get the plug in harness eliminator. But there was a post yesterday saying you can remove the MAN TRAN SOL fuse which will also turn it off. Not sure about the validity of that claim so don't hold me to it. You can always drive it like you stole it and CAGS will never kick in. Unfortunately for me I live in a downtown area so that becomes next to impossible.
Buy the CAGS eliminator from PFYC (Forum vendor, best price, cleanest design, reliable part), install and be done with it...unplug the solenoid harness to disconnect solenoid, and plug in the eliminator connector ends at the harness and the transmission receptacle (keeps receptacle clean if you want to restore CAGS in the future). The eliminator provides enough resistance to the circuit to make the PCM diagnostic think the harness is still connected.
Drifting
Joined: Jun 2002
Posts: 1,303
Likes: 151
From: Las Vegas Nevada
I think it depends on where you drive. I drive in Las Vegas and where CAGS was a problem is in this example:
I am in a double left turn lane in a line of traffic that crosses a couple of lanes of traffic and goes up a slight incline to cross over a freeway. I start in 1st, I'm watching the signal light, the traffic and car/truck beside me, I am going about 15-20 mph and shift. CAGS kicks in and now I'm in 4th, traffic slows a bit and I'm on an up-hill. Now the engine bogs down some (the low end torque of the C6 is awesome). Now I have to shift to 2nd or 3rd, and the whole process is just not as smooth as I'd like.
I got one of the CAGS eliminators for $20, took 5 minutes to install, and never have to worry about getting 4th when 2nd is what I want.
The CAGS shift (1st to 4th) can/will improve your gas mileage. You can avoid th CAGS shift with speed, throttle, and RPM - but running around town in traffic at 2500+ RPM just isn't necessary.
One way to look at it - I paid for all the engines RPM from 700 idle to 6500 red line - I want to be able to use any RPM that works for the current situation.
Cheers - Jim
I am in a double left turn lane in a line of traffic that crosses a couple of lanes of traffic and goes up a slight incline to cross over a freeway. I start in 1st, I'm watching the signal light, the traffic and car/truck beside me, I am going about 15-20 mph and shift. CAGS kicks in and now I'm in 4th, traffic slows a bit and I'm on an up-hill. Now the engine bogs down some (the low end torque of the C6 is awesome). Now I have to shift to 2nd or 3rd, and the whole process is just not as smooth as I'd like.
I got one of the CAGS eliminators for $20, took 5 minutes to install, and never have to worry about getting 4th when 2nd is what I want.
The CAGS shift (1st to 4th) can/will improve your gas mileage. You can avoid th CAGS shift with speed, throttle, and RPM - but running around town in traffic at 2500+ RPM just isn't necessary.
One way to look at it - I paid for all the engines RPM from 700 idle to 6500 red line - I want to be able to use any RPM that works for the current situation.
Cheers - Jim
Last edited by Carnac; Apr 20, 2007 at 11:33 AM.
Race Director
Joined: Dec 2006
Posts: 11,762
Likes: 2
I think it depends on where you drive. I drive in Las Vegas and where CAGS was a problem is in this example:
I am in a double left turn lane in a line of traffic that crosses a couple of lanes of traffic and goes up a slight incline to cross over a freeway. I start in 1st, I'm watching the signal light, the traffic and car/truck beside me, I am going about 15-20 mph and shift. CAGS kicks in and now I'm in 4th, traffic slows a bit and I'm on an up-hill. Now the engine bogs down some (the low end torque of the C6 is awesome). Now I have to shift to 2nd or 3rd, and the whole process is just not as smooth as I'd like.
I am in a double left turn lane in a line of traffic that crosses a couple of lanes of traffic and goes up a slight incline to cross over a freeway. I start in 1st, I'm watching the signal light, the traffic and car/truck beside me, I am going about 15-20 mph and shift. CAGS kicks in and now I'm in 4th, traffic slows a bit and I'm on an up-hill. Now the engine bogs down some (the low end torque of the C6 is awesome). Now I have to shift to 2nd or 3rd, and the whole process is just not as smooth as I'd like.
I live in downtown Dallas and in my case CAGS became such a pain in the a$$ that I needed to turn it off. Normally for all my other driving it would have never become an issue.
