Hey guys, on my 2000 f350 the overdrive light blinks most of the time. Some days it runs pretty good, and other days it runs like complete s#!t. Randomly, the light will stop blinking and the truck runs perfect for however long the light is out. Some days even with the light blinking the truck will go into overdrive and some days it wont. All of the above mentioned happens at complete random, and I cant figure out what the problem is. Hopefully someone can tell me what the hell is going on with this thing. Thanks.

 

Get the codes read, but not at a parts store. Post what you find here.

Mark

 

You will need to have the codes read by Ford or a High end scan tool that most shops and auto parts stores will not have. I would stop driving it if thats an option because you might be doing more damage by driving it.

 

Ok i'll see about getting the codes read thanks

 

Ok so I'm old fashioned: how is the trans fluid color and level? What happens when you hit the switch to lock out OD?

 

Well when I got the truck the trans fluid level was fine and I was told by someone having similar problems that a transmission shop told them to dump a bottle of trans cleaner in and the problem should work itself out in about 2 weeks. Well long story short its been 6 months and no change. When I hit the overdrive button the truck drops a gear and the RPMs skyrocket, as would be expected. Like I said, everything that happens is completely random and it has me baffled.

 

As stated, the light flashing is an indication that there are transmission codes generated. Not necessarily anything to do with the O/D function itself.

 

I'm glad you learned snake oil will not fix a transmission. Modern ATF has enough detergents in it to keep things clean on its own. Take note and avoid that shop completely.

 

Yeah when I was told that I didn't believe it but figured it was worth a shot

 

So I haven't been able to get the codes read but talked to my uncle who sold me the truck and he said he had the codes read and it was something that has to do with some sort of faulty switch in the transmission? I'm not very knowledgable on transmissions so I don't even know whether to believe that or not.

 

Bro, you need the codes. The flashing light is telling you something is wrong and a code is stored. Get the code and you can move forward.

 

You really have three choices here.

1. Get the codes read so that we know what needs to be fixed.
2. Start changing parts until you get lucky.
3. Keep driving until the trans fails and replace the whole trans. It won't take long for this to happen if you keep driving it like this.

I think Option 1 is the cheapest way to go.