ShadowDrake

Alright, O/D off light started flashing today, it refuses to shift...

I know the flashing O/D light is essentially the check engine light, for the transmission.

How do I go about figuring out what the problem is? Is there a code that can be scanned? What are the common causes of this?

It's a 99 expedition 4wd, but it's the same automatic tranny as in the stangs, figured someone here would know.

ShadowDrake

Bump. I know there's people out there who have had transmission problems.

Edit: Update. Has no reverse unless you rev it pretty high. Works fine when it's cold, once it warms up, it starts slipping and having problems. PLEASE HELP. I want to at least diagnose the problem before I take it some place or attempt to fix it myself. Are there diagnostic codes for the automatic transmissions? How do I access them?

cease4

That happened to one of my friends explorer recently its a 95 but i doubt is the same trans the problem with his was the TPS Sensor if u can try and get it diagnosed even if the check engine is not on....

ShadowDrake

That's what I was wondering,if I take it to AutoZone and get the codes scanned, will anything come up? Thanks for the suggestion, too.

cease4

Well i used to work there so it might sometimes the scanner actually picsup codes with out setting off the light but it doesnt hurt to try its free anyway

ShadowDrake

Ok, thanks again. The only issue is that it only takes a matter of minutes for it to slip out of drive (shift it into 2 to keep driving) and it'll go for a while, then 2nd will slip out, shift it to first, and before long first will start slipping also.

One final bump.

2k1gt

Mine did it once. I have an aftermarket t-handle and I rewired the o/d button to a toggle on the dash. I guess the wires had come loose and it caused the problem. I just re-connected the toggle and reset the computer by unplugging the battery for a few minutes.

96mod289

There are codes for the tranny-Get it scaned it could be one of a milllion things. The sooner the better

2000NoviGT

Mine does that once in a while but I have a B&N race tranny with a manual shift valve body so I dont think the O/D switch reads right.

SikGT

I have a 99 Ford Explorer as my Daily Driver. I just got it back from Aamco today cause it was doing the same thing that you described. Mine wouldn't shift into the last gear "lock up" at highway speeds so the RPMs stayed high and I was losing gas mileage like crazy. I took it in and they did a computer diagnostic and told me all the electronics were fine. In the end after dropping the tranny it turned out to be the torque converter.

I got a new Torque Converter and a few smaller little things that were replaced for insurance and the total with parts and Labor came out to $2568.83

I was like DAYUM! But whatever. I'm sure the stealership isn't any better. I just told the guy "Whatever just get the damm thing back on the road." 4 days later, it runs like a charm.

Makes me wish I had more mechanical skills.