F
FISHAWK
Guest
Hello fellow Corvette lovers, I am brand new to this forum and mearly wanted to introduce myself ![Smile :) :)](https://cdn.jsdelivr.net/joypixels/assets/8.0/png/unicode/64/1f642.png)
![Smile :) :)](https://cdn.jsdelivr.net/joypixels/assets/8.0/png/unicode/64/1f642.png)
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Hello fellow Corvette lovers, I am brand new to this forum and mearly wanted to introduce myself![]()
I wish I could help but I have no experience with the 4+3recently purchase a 1987 vette 4+3..what is the shift pattern for it is not in the stick...also it has od but I do not know how to work it....or activate it...
i need some guidance....at times it is very hard to shift into first gear......
OK I did some research and hear is what I found, The 4+3 is actually a normal 4- speed trans with a 2- speed planetary overdrive unit attached to it. What this means is that you have seven gear ratios, The overdrive unit is controlled by the ECM (engine computer) It monitors the vehicle speed and throttle position and chooses an overdrive ratio accordingly.Also the overdrive doesn't work in 1st gear,and is automaticlly engaged above 110 mph. finally, the overdrive can be turned off via a switch on the center console. This is all I could find about it, as far as the hard engagement into gear would be impossible to diagnose without more info, I hope I have been some helprecently purchase a 1987 vette 4+3..what is the shift pattern for it is not in the stick...also it has od but I do not know how to work it....or activate it...
i need some guidance....at times it is very hard to shift into first gear......
OK I did some research and hear is what I found, The 4+3 is actually a normal 4- speed trans with a 2- speed planetary overdrive unit attached to it. What this means is that you have seven gear ratios, The overdrive unit is controlled by the ECM (engine computer) It monitors the vehicle speed and throttle position and chooses an overdrive ratio accordingly.Also the overdrive doesn't work in 1st gear,and is automaticlly engaged above 110 mph. finally, the overdrive can be turned off via a switch on the center console. This is all I could find about it, as far as the hard engagement into gear would be impossible to diagnose without more info, I hope I have been some help![]()
After looking everywhere I could think of ,I couldn't find out exactly where it is located , I wish I could have been more helpfuldo you know where the od switch is located? you did mention the center console but I can't seem to find it.
...what is the shift pattern for it is not in the stick.........
.........do you know ....... but I can't seem to find it.