Fluid leak, now no forward.

[MWzd]

I hit a deer and aside from bumper damage, the transmission in-line filter (from cooler) cracked and fluid emptied. Lost forward. Did not lose reverse. Ran line without filter. Added 3 quarts of Mercon V. Started driving. Few hours later, checked dipstick and it was dry. Bought 3 more quarts. They smelled like burnt rubber. Dipstick shows good level. Still no forward gears. I watched a YT video showing replacement of OSS(Output Speed Sensor) as fix. I drove out of state to retrieve the sensor, and have new filter arriving around January 3rd. My questions are: Did I cause damage by putting in possible bad fluid? Is there something I may be overlooking? Thanks!

 

[S20Workstation4]

Was the fluid a bright red when you bought it? Significant damage could be done if the trans fluid was really dark, tarry, and smelled burnt. However, I think the vehicle would have to be driven a couple hundred miles before it could cause significant damage.
Also, what is the year of your Expedition?

Do you know if there are any codes that are stored in the TCM? I would check that, and continue from there.

Merry Christmas.
- Joseph.

 

[MWzd]

I would say color and viscosity looked good. It just smelled bad. FRAM brand. The truck is a 2001 with, I believe, the R100 transmission. Codes I got pulled up are as follows:
P0102
P0442
P0401
P0175
P0720-Pending
P0722-non MIL
C1185

Merry Christmas to you as well,
-Jason

 

[S20Workstation4]

The Engine codes can be ignored for now, P0720 and P0722 are OSS codes. You said above that you retrieved a new OSS, did you install it yet?

Those two codes are pointing towards OSS failure, but it is odd that it would fail around the same time that the trans cooler line broke.
Since the reverse gear still works, does the speedometer work when moving in reverse. The OSS controls the speedometer. if the Speedometer does not work, then most likely OSS Failure.

You should be able to access the OSS from under the truck, the sensor is located on the driver side and near the rear of the transmission. Once you get to it, check the wiring for any damage to it. It is tight in there, but pull off the connector and look for any corrosion inside the connector.

- Joseph

 

[MWzd]

I plan on doing the sensor on my coming up weekend in 2 days. I'm not sure about the speedometer. Wasn't even aware it moves going in reverse. I'll post an update around New Year. Thank you Joseph!
-Jason

 

[S20Workstation4]

Ok, that sounds good.
You're welcome, I'm glad to help.

- Joseph.

 

[MWzd]

I've got the new sensor in. No corrosion on harness plug. Speedometer DOES move in Reverse, however still no forward. It crawled up about a foot maybe with acceleration near 2k RPM, then nothing.

 

[MWzd]

Bought a Maddox pressure test kit. Gonna see how that looks.

 

[MWzd]

Ran a line pressure test. Thoughts?

 

[MWzd]

Also D,2,1 all identical