Getting in 2nd gear is not smooth!!!
Thread Starter
Advanced
Joined: Nov 2006
Posts: 85
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From: Smithville Tn
Getting in 2nd gear is not smooth!!!
Just purchased 07 Z 51 with a 6 sd. When shifting from first to second, it is the worst i have ever driven!!! Has any one else had this problem?? Thanks!!!!!!!!!!!! Jim B
Melting Slicks
Joined: May 2006
Posts: 2,891
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From: NJ..."the way I saw it, everyone takes a beating sometimes."
That might be your problem. GM designed into the MN6 transmission, CAGS. Computer Assited Gear Selection. Basically it adjusts the shift tunnels in the shifter so that you have to shift from 1st-4th if you're rpms are under 2300 I believe. It's in the owners manual. It was designed for fuel economy. Most owners remove it with a tune or a $25 unit know as the skipt shift eliminator sold by many of the vendors. You can also drive around it by bringing your rpms another 100-200 or so higher. This is most likely what is causing the awkward feel going from 1st-2nd.
Team Owner
Joined: Oct 2004
Posts: 27,420
Likes: 64
From: San Clemente CA
Check this out.
http://forums.corvetteforum.com/show....php?t=1470758
They are a good company, I have ordered from them.
It takes 10 minuets or less to install and anyone can do it.
http://forums.corvetteforum.com/show....php?t=1470758
They are a good company, I have ordered from them.
It takes 10 minuets or less to install and anyone can do it.
Moderator
Joined: Dec 2002
Posts: 40,901
Likes: 4,352
From: Lakewood Ranch, FL
The transmission is designed to force a 1 -4 shift (fuel savings) at low speed/low throttle position. Trying to force the transmission into any gear other than 4th can damage the transmission.
To avoid this requirement, shift at a higher speed or higher throttle setting or, as suggested, install a CAGS eliminator.
If, however, you are having a problem shifting to 2nd and the speed is higher than about 20 MPH or the throttle is more than 21%, then the problem may be other than the 1-4 CAGS. I that case, have a tech check it out.
To avoid this requirement, shift at a higher speed or higher throttle setting or, as suggested, install a CAGS eliminator.
If, however, you are having a problem shifting to 2nd and the speed is higher than about 20 MPH or the throttle is more than 21%, then the problem may be other than the 1-4 CAGS. I that case, have a tech check it out.
Safety Car
Joined: Jul 2001
Posts: 4,456
Likes: 6
From: Spicewood, Texas, USA TX-Texas
Since you're getting into second gear (you say getting in is not smooth), the problem is not the CAGS...when CAGS intervenes, you don't get into second, period. You may want the CAGS eliminator to have better control of your vehicle, but it won't help rough shifting of the MN6 when the fluid temp is cold.
Difficult shifting when transmission fluid is cold is a common problem for the MN6 and not really serviceable. You can patiently wait for the transmission oil temp to come up, or change to another fluid. Do a search and take your choice of threads. I haven't noticed this problem much this year...either I'm just accustomed to it or it hasn't been cold enough to really make it noticeable yet.
Difficult shifting when transmission fluid is cold is a common problem for the MN6 and not really serviceable. You can patiently wait for the transmission oil temp to come up, or change to another fluid. Do a search and take your choice of threads. I haven't noticed this problem much this year...either I'm just accustomed to it or it hasn't been cold enough to really make it noticeable yet.
Last edited by JmpnJckFlsh; Nov 24, 2006 at 03:57 PM.
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Drifting
Joined: Feb 2001
Posts: 1,539
Likes: 63
From: new ulm mn
My '07 Z51 has the same problem. It does get better as the car warms up. Hope it gets better with CAGS bypass. My brother's '01 has a slight "notch" going from 1-2 also. He never did the CAGS thing.
Instructor
Joined: Oct 2006
Posts: 184
Likes: 0
From: Issaquah WA
Originally Posted by loflite
My '07 Z51 has the same problem. It does get better as the car warms up. Hope it gets better with CAGS bypass. My brother's '01 has a slight "notch" going from 1-2 also. He never did the CAGS thing.
Same here, 07, z51, 5800 miles on it now, better, but still cranky until
warm. Once its warmed up (oil temp > 180 in the DIC) the MZ6 shifts
like butter.
Instructor
Joined: Aug 2006
Posts: 129
Likes: 0
Same problem here with my 07 Z51 M6, when the fluid is not fully warmed up.
Based on the recommendations of folks on this forum, I changed the fluid to Royal Purple Synchromax. Now, the shifts are much better when the fluid is cold and they become smooth at fluid temps well below fully warmed up.
Based on the recommendations of folks on this forum, I changed the fluid to Royal Purple Synchromax. Now, the shifts are much better when the fluid is cold and they become smooth at fluid temps well below fully warmed up.
Team Owner
Joined: Oct 2004
Posts: 27,420
Likes: 64
From: San Clemente CA
Originally Posted by rzone
Same here, 07, z51, 5800 miles on it now, better, but still cranky until
warm. Once its warmed up (oil temp > 180 in the DIC) the MZ6 shifts
like butter.
warm. Once its warmed up (oil temp > 180 in the DIC) the MZ6 shifts
like butter.