Overdrive
Thread Starter
Drifting
Joined: Nov 2006
Posts: 1,714
Likes: 20
From: Ontario
Overdrive
umm my overdrive is acting all kinds of funky. it likes to turn itself on.. a lot. the main time is when I shift from 1st to 2nd it will turn on, I hit the overdrive button and it turns off then 3rd gear shift works but sometimes the 4th gear shift it turns itself back on again. I turn it off and shift to 1st for a light, repeat. Now if I don't turn off OD in 2nd and 3rd it will turn off when I goto 4th.
I have the 4+3 early one with the overdrive on the button btw.
any thoughts?
I have the 4+3 early one with the overdrive on the button btw.
any thoughts?
Burning Brakes
Joined: Jan 2007
Posts: 921
Likes: 0
From: Houston TX
It sounds like you have the button in the shift ****. On the bottom side of the shifter is a switch. You might check to see if the switch is intermittant or something wrong with the actuator. I moved mine to a toggle switch on the console and it works great.
Team Owner
Joined: Jan 2003
Posts: 20,335
Likes: 264
From: Summerland B.C. Canada
Check out the relay, the wire insulation shrinks back and will allow a possible intermittent short.
Here is some daignostics from my 86 manual. http://members.shaw.ca/agent86/Overd...iagnostics.pdf
Here is some daignostics from my 86 manual. http://members.shaw.ca/agent86/Overd...iagnostics.pdf
Le Mans Master
Joined: Sep 2005
Posts: 6,551
Likes: 36
From: Jenks OK
While you're at it change the OD fluid and filter, unless you've done it recently. The seal around the pan goes bad from sitting in atf all the time and they tend to be low on fluid. doubt that would cause the switching on condition but it was the cause of my problems with the OD acting goofy.
Thread Starter
Drifting
Joined: Nov 2006
Posts: 1,714
Likes: 20
From: Ontario
While you're at it change the OD fluid and filter, unless you've done it recently. The seal around the pan goes bad from sitting in atf all the time and they tend to be low on fluid. doubt that would cause the switching on condition but it was the cause of my problems with the OD acting goofy.
I'll look for that wire I think.
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Melting Slicks
Joined: Jan 2004
Posts: 2,659
Likes: 3
From: Oxford CT
Pro
Joined: Sep 2006
Posts: 702
Likes: 2
From: Conyers Ga
There are so many parameters that control the OD unit........speed, temp etc that it can be tough to nail down a problem. I just picked mine up last week after having the OD completely rebuilt. Mechanically it's great but it still goes into OD the first time the engine temp hits 123. Once I trun it off it works fine.
There is a thread here in archives that details how to turn it into a completely manual OD that you may find interesting. Other then that I'd have to agree about the relay.
There is a thread here in archives that details how to turn it into a completely manual OD that you may find interesting. Other then that I'd have to agree about the relay.