Rick Hoke

11months after my original posting, I have a code P1876 Trans case selonoid circuit fault. Can any one tell me what this means.

I own a 2003, 7.3 liter, Power Stroke Diesel. The overdrive light on the transmission shifting arm will suddenly start flashing and the transmission will down shift. I have taken it to three mechanics and no one has resolved the issue. Any suggestions.

gmaier

well first off the light flashing is indicating that the transmission has thrown a code , did the mechanic hook acode reader up to it, if so what was the code, if not i would start there

widman

When my Grand Cherokee did that, it gave an error code that was a bad sensor (after checking for loose wires and the usual). Rather than spend the money on the sensor I added a bottle of Transmission Conditioner/Sealer. The conditioner is a synthetic ester with high solvency. Cleaned it up and it's been fixed for 5 years.

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Richard's Corvair
Selection of the Right Motor Oil for the Corvair
2003 F550 6.0 Powerstroke 6 speed

FionaThe02PSD

Typically when the OD is flashing it means the trans is upset with a shift or some other perameter. It can also mean that the VSS needs to be cleaned (It's on the rear diff.).

As was stated before you need to get the codes read so you know where to start looking.

SDUTY

i own a 2002 f250 and was having the same problem and found three wires broken inside the shift column.to remove the ignition turn it to the on position and there is a small hole underneath insert small awl and push a button ignition should pull out then remove screws /good luck !!

Rick Hoke

Sorry none of the above . No error codes showed! This time I personally witnessed the test. Where do I go from here.