OD button on gear shift problem
Thread Starter
8th Gear
Joined: Jul 2011
Posts: 8
Likes: 0
OD button on gear shift problem
I have a 1988 C-4 with a 4x3 OD. tranny. The OD works fine, shifts in and out automatically. However the button on the gear shift does nothing. I have taken off the gear shift **** and pulled out the spring and the two rods. one metal the other plastic. Nothing seems to be broken. What do I do next? Help. This is my first 'vette.
Team Owner
Joined: Mar 2001
Posts: 54,124
Likes: 30
From: Cincinnati, Oh USA
There is a small pushbutton switch at the bottom of the gear shift that is actuated by the rod on the OD button. You may have a defective switch or a broken wire going to the switch, both will not allow you to manually keep the OD locked out or to engage OD by pushing the OD button.
Le Mans Master
Joined: Aug 2000
Posts: 8,838
Likes: 31
From: Australia
$4 and some soldering (discard plastic **** )
http://www.radioshack.com/product/in...ductId=2062541
$70 for the plug and play version
http://www.ecklerscorvette.com/corve...1986-1988.html
Team Owner
Joined: Jan 2003
Posts: 20,292
Likes: 239
From: Summerland B.C. Canada
Are you trying the OD switch when engine is cold, or both cold and hot(switch is useless until a certain coolant temp is obtained)?
Maybe the T rod that goes to switch needs some adjustment. Turn the T rod counter clockwise and it will raise the height of switch and may solve your problem.
Switch is removed after removing console and shifter boot.
Here is some info on the switch from my 86 FSM
http://members.shaw.ca/agent86/OD%20Switch.pdf
Here is electrical schematic
http://dankai.shawwebspace.ca/asset/...electrical.pdf
Maybe the T rod that goes to switch needs some adjustment. Turn the T rod counter clockwise and it will raise the height of switch and may solve your problem.
Switch is removed after removing console and shifter boot.
Here is some info on the switch from my 86 FSM
http://members.shaw.ca/agent86/OD%20Switch.pdf
Here is electrical schematic
http://dankai.shawwebspace.ca/asset/...electrical.pdf
Thread Starter
8th Gear
Joined: Jul 2011
Posts: 8
Likes: 0
Thanks for every ones suggestions and the neat schematics from Agent 86. Think I'll try the Radio Shack idea first and if that doesn't work I'll go the $70.00 route. At least now I know where the problem is and how to fix it. Thanks all.
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Slingshot
Joined: Dec 2001
Posts: 3,817
Likes: 24
From: Charlotte NC
Thread Starter
8th Gear
Joined: Jul 2011
Posts: 8
Likes: 0
After removing dash and console trim and taking apart gear shift down to the switch, I noticed the switch was loose and had become dislodged from the mount there bye causing the plastic slider to miss the pin. After tightening down the lock nut and putting everything back together it works just fine. I.m glad I took it apart before I ordered a $70.00 replacement. Thanks to everyone for their sound advice and instructions . I'll be keeping the info for further use. One thing I learned so far about Corvettes are they like
a lot of attention.
a lot of attention.
Slingshot
Joined: Dec 2001
Posts: 3,817
Likes: 24
From: Charlotte NC
