4R70W Problems

[Dweano]

Hey guys.
I swapped the powertrain from a 96 V8 Explorer into my 96 Ranger. I am testing it out and having tranny problems (story of my life)

I was driving it around, wouldn't shift into 4th (I thought)). It would just slow down hard (like you shifted into first) around 80km/h, but if I pressed the O/D off button it would be normal again because it would shift into what I assumed was 3rd. Checked the fluid...way low (worked its way into the lines, cooler, etc) so I filled it up. Ran, repeat, filled.

Then I drive it again and it was acting like it was overfull (because it was) once and awhile it was like there was air bubbles because it would push fluid out of the breather tube. Then it would be good. Then it would do it again. So I drove around some more and it still won't shift. I put it in 2 and it is no different than D, so it seems like it won't shift to third now?????

Drained some out.

So now I think that the fluid is around normal level (maybe slightly high). Its hard to tell with a wet dipstick and clearish fluid. But still...won't shift into 3rd. At 80km's its around 3300 rpms. Way too high

I should say that my 4x4 lights flash (because I have a AWD tcase from an explorer so there is no indicators) and also switching from O/D on to O/D off does nothing.

Any suggestions? Please don't say it is blown. I have spent way too much time and money already on this

 

[drdoom]

Is the PCM compatible? Or maybe you swapped it in already with the powertrain.

 

[SoNic67]

Also the transmission connector wiring...
http://www.sccoa.com/forums/showthread.php?117751-How-to-4r70w-swap

 

[Dweano]

Swapped the expo computer. The harness is all from the expo. I didn't even disconnect anything from the tranny. Kept the engine and tranny together as a unit. Only wiring that changed was starter wiring, alternator wiring (slightly, using stock harnesses), and then the big 42 pin connector from the expo harness bolted right up to the ranger 42 pin connector. So I feel like it isn't wiring.

I am confused why I had 3rd before and now don't even 3rd.

The guy I bought it from assured me it all worked before the accident (the explorer was totalled) front end. I don't think that affected anything tho. But he said I should try bleeding it (makes sense with the air bubble type issues) and then pending that the shift solenoids need replaced?

 

[Dweano]

Fun fact. Drained some fluid. "bled" the tranny. Alright so fluid should be good to go.

Take it for a drive...still no third or fourth. Eff...

Alright turn it around...put it in reverse...back up...put it in drive...nothing...put it in second...nothing. Put it in first....REVERSE!!! ....wtf?

So in conclusion right now

R-reverse
D-nothing
2-nothing
1-reverse

No grinding or anything