Over Drive issue

[supawiz6991]

OK guys ive got another one. when i was given the car the over drive work except when it was really cold util i let it warm up usually 10 mins or so. Now the O/D off light doesnt work and when i turn over drive on it goes into over drive but after a few miles it down shifts on its own with the button still on. anyone know what is causeing this?? i hope someone knows cause i really really really like this car and i want to get this fixed asap.

[JMSports]

Originally Posted by supawiz6991

OK guys ive got another one. when i was given the car the over drive work except when it was really cold util i let it warm up usually 10 mins or so. Now the O/D off light doesnt work and when i turn over drive on it goes into over drive but after a few miles it down shifts on its own with the button still on. anyone know what is causeing this?? i hope someone knows cause i really really really like this car and i want to get this fixed asap.

You shouldn't take the car out of overdrive. There isn't a need for it to not be in overdrive.

Hmm, how fast are you going and what two gears is it switching between?

[supawiz6991]

usually between 50 and 60 but as high as 70. it down shifts from over drive to 3rd. After this occurs the only way to get O/D to work again is to stop and turn the car off and the O/d switch off, start it and get back to 50 MPH and turn O/D switch back on. and like i said the O/D off lights isnt working.

[white90dx]

You mention two separate issues in your first post.

The car is designed to stay in 3rd gear until the car is reasonably warmed up. My Alltrac starts using overdrive when the temp needle is about 1/3 of the way up. In cold weather, this can sometimes a while, especially if you are just idling in the driveway.

The random downshifting back to 3rd after the car is warm could be many other problems...

-Charlie

[supawiz6991]

Originally Posted by white90dx

You mention two separate issues in your first post.

The car is designed to stay in 3rd gear until the car is reasonably warmed up. My Alltrac starts using overdrive when the temp needle is about 1/3 of the way up. In cold weather, this can sometimes a while, especially if you are just idling in the driveway.

The random downshifting back to 3rd after the car is warm could be many other problems...

-Charlie

What kind of problems? would it be related to the O/D off light?? The O/d off light worked when i got the car and only stopped working recently i think it may be an electrical issue? what do you think??

[white90dx]

Originally Posted by supawiz6991

What kind of problems? would it be related to the O/D off light?? The O/d off light worked when i got the car and only stopped working recently i think it may be an electrical issue? what do you think??

First, check to make sure the bulb and all the electrical contacts on the gear indicator panel are working. It is normal for 20 year old bulbs to burn out. You can get to it by removing the 5 screws that hold the gauge cluster surround out, popping it out, unplugging the connections. You can then access it from the back of the surround.

I just took a look at the diagrams, and it looks like if the "O/D Off" bulb is burned out or the wiring has gone bad around it that it could cause the random shifting out of overdrive that you describe. The light bulb actually works as part of the O/D control circuitry.

Like I said before though, it is normal for the car to not shift into overdrive until it has partially warmed up.

-Charlie

[supawiz6991]

Originally Posted by white90dx

First, check to make sure the bulb and all the electrical contacts on the gear indicator panel are working. It is normal for 20 year old bulbs to burn out. You can get to it by removing the 5 screws that hold the gauge cluster surround out, popping it out, unplugging the connections. You can then access it from the back of the surround.

I just took a look at the diagrams, and it looks like if the "O/D Off" bulb is burned out or the wiring has gone bad around it that it could cause the random shifting out of overdrive that you describe. The light bulb actually works as part of the O/D control circuitry.

Like I said before though, it is normal for the car to not shift into overdrive until it has partially warmed up.

-Charlie

OK. i will check the wireing. i know that it is normal for it not to shift into overdrive when its cold. i can get it in overdrive its keeping it there thats the problem.

to the wireing: if the wireing is going bad what should i look for and do??

[white90dx]

Originally Posted by supawiz6991

OK. i will check the wireing. i know that it is normal for it not to shift into overdrive when its cold. i can get it in overdrive its keeping it there thats the problem.

to the wireing: if the wireing is going bad what should i look for and do??

First, replace that bulb... It'll take a time to figure out where to go next if that doesn't fix it.

-Charlie