4+3 Problem
Thread Starter
Instructor
Joined: Apr 2008
Posts: 171
Likes: 1
From: west chester pennsylvania
4+3 Problem
always the first time i put in in 1st gear after starting it up, at about 1700rpms, the overdrive kicks on. i usually just put it in netrual and click it off real quick and its fine until i start the car up again.
now, the buttons not turning it off?
any idea whats going on here?
any help is appreciated.thanks in advance
now, the buttons not turning it off?
any idea whats going on here?
any help is appreciated.thanks in advance
Team Owner
Joined: Dec 1999
Posts: 34,873
Likes: 487
From: Lacey WA RVN 68-69
NCM Sinkhole Donor
A common problem is a failing OD switch on the shifter. It's easy to replace. Do a search on OD button for some info.
The OD on my 87 will go into OD in low gear depending on throttle opening percentage and low RPM. Slow speeds in 1st will allow a 1st gear OD.
Here's some information on how the OD operates based on the year. Note that the 87-88 is different in operation from the earlier year units.
The OD on my 87 will go into OD in low gear depending on throttle opening percentage and low RPM. Slow speeds in 1st will allow a 1st gear OD.
Here's some information on how the OD operates based on the year. Note that the 87-88 is different in operation from the earlier year units.
Pro
Joined: Sep 2006
Posts: 702
Likes: 2
From: Conyers Ga
First off, I like the color you chose for your vette.
Is your switch in the shifter or the console? The shifter switch is a little hard to find and more detailed to install then the console one. Search here for OD switch. There are plenty of threads related to this.
I'm not sure about the 87's but on my 88, until the engine reaches 123 degrees, it won't go into OD.
Is your switch in the shifter or the console? The shifter switch is a little hard to find and more detailed to install then the console one. Search here for OD switch. There are plenty of threads related to this.
I'm not sure about the 87's but on my 88, until the engine reaches 123 degrees, it won't go into OD.
Pro
Joined: Sep 2006
Posts: 702
Likes: 2
From: Conyers Ga
The shifter mounted switch is not easy to find. E-Bay might be the best bet. Before you do that though, when you press the button, does the OD indicator light come on? If the light comes on then the switch is good and the problem lies elsewhere.
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Thread Starter
Instructor
Joined: Apr 2008
Posts: 171
Likes: 1
From: west chester pennsylvania
thanks guys.
i just got down to the switch and the 2 electric wires connected to it were both split in half, so im gonna assume thats why the button wasnt working.
is the fluid your talking about the same as the clutch fluid that goes into the master cyl.? where is it?
i just got down to the switch and the 2 electric wires connected to it were both split in half, so im gonna assume thats why the button wasnt working.
is the fluid your talking about the same as the clutch fluid that goes into the master cyl.? where is it?
Pro
Joined: Sep 2006
Posts: 702
Likes: 2
From: Conyers Ga
I hope you counted the number of turns it took to remove that "T" rod.....
Thread Starter
Instructor
Joined: Apr 2008
Posts: 171
Likes: 1
From: west chester pennsylvania
