97 PSD..Auto trans only has first, fluid clean, no flash on OD light
 

1997 PSD e4od auto trans 4wd

I only have 1st gear. No reverse. Starts and stays in 1st whether I put it in 1,2 or D. neutral is neutral and no reverse.

OD light is not flashing. Fluid is clean and clear at the correct level.

It drove fine when I drove to the store, came back out started it up and had this problem.

Speedo works, tach works. I cleanned the VSS and check all the plugs going to the trans for damaged wires or corroded ends. All checks fine.

Any ideas?

-Jason

Check the connection on the terminal pass side.

Just checked it all a second time, everything looks perfect and clean!

I wonder if it's getting the shift signal, maybe the ECM is heading south. Anyway to wire up a test light you can see when driving? I suppose the test light should come on for the 2nd gear signal. Least you could rule out if the comp is... Wait a second.....
This happened to me.....
The Tps....... If below .8 it wants to stay in first cause it can't find a proper Tps signal......
Worth a shot! See if it's alright and it's not corroded.

Hmm alright, Ill check it out right now.

Did you have reverse? I have nothing, not even a clunk into reverse.

J

Checked it out..

5 volts being supplied from the harrness

3.5K ohms at max throttle on the sensor

So that should be fine I would think..

J

Actually try completely unplugging the transmission connector. The big on on the passenger side, not the one on drivers side on the range selector.

It should default to 4th gear in the "D" position, and 2nd gear in "1" or "2". Reverse should engage fine. If it doesn't function like this with the electrical connection unplugged, then there is an internal transmission problem.

Yea I had reverse, but it wouldn't shift into second, found it to be the Tps went south.
The voltage should be .8 volts at idle.
Maybe the ECM isn't getting the signal.

Here found this for you.
97 psd with e40d that wont shift from 2-3 - Ford Powerstroke Diesel Forum

If his TPS went south, his truck wouldn't do anything. 7.3 PSDs are completely electronically injected. There is no throttle valve, plate or cable. The TPS is built right into the gas pedal.

This no shift is a tricky one....
Kinda wanna know what it is, so I've been hunting around online.
Seems like a lot of people have had issues with the Solonoid pack.
Also some of it is wiring.
Here is a wiring diagram for the e4od (includes both the 89-93 and 94-97)
http://www.powertraincontrolsolution...1124116SCH.pdf

I tested the MLPS, its good.

I unplugged the pass side plug, I had no change.
Only had 1st gear. No reverse.

Whats interesting, while in the air, I put it in either reverse or nuetral and the rear wheels turn forward (limited slip btw) but no power behind it at all.

Its on the trailer now, tranny shop in the morn to have any codes read.

J

Unfortunately you have an internal transmission problem. Hopefully it's just something easy like a stuck valve in the valve body or a faulty solenoid pack.

It looks like perhaps your intermediate clutch is not applying.

Truck went to the trans shop, said its a mechanical issue.. pulling it out tonight!