96 shifting issues flashing od light

[lifeguard379]

Hello everyone long time no post for me. I recently purchased a 96 4.0 ohv Explorer that had a leaky transmission for $400. after welding the crack in the extension housing. and replacing the vehicle speed sensor and the output speed sensor and the instrument cluster I still have no speedometer and the overdrive light is flashing. And it is not shifting correctly. I am at a loss as to look at and I have not come up with any results in the search. If I can't get it fixed for cheap I'm putting the engine into my 93 crawler. And the interior into my 97 V8. But this one seems like a nice truck and I hate to scrap it.

 

[JK080]

Without a speed signal the transmission will not work like it should, just going to have to troubleshoot it and figure out why there is no speed signal. May have to use a scope to check for speed signal at different points in the circuit.

 

[lifeguard379]

So I was looking at another helpful thread that talks about the harness connection points I took them apart and all looked clean so basically I just need to Ohm out the wires and find a short?

 

[lifeguard379]

And thank you for your reply and input.

 

[lifeguard379]

Or are you talking about an oscilloscope? Only time I've ever used one of those is when I'm timing the chuck on the CNC lathe at work.

 

[lifeguard379]

So does it make any difference that when I changed my instrument cluster and I pulled out the shift indicator the sticker on it said a4ld e? A 96 has a 4r55w right? Not an A4Ld?

 

[JK080]

Yeah not a A4LD.

Here is some examples on how to check speed sensors, the video is of a ABS sensor but it's the same concept.




Testing 2 and 3 Wire Speed Sensors

 

[lifeguard379]

But it does sound like not an electronic issu not an internal issue?

 

[JK080]

Well if you had a good speed signal and still doesn't work right a internal problem may be a option. Correct any obvious problems first before trying to diagnosis any transmission issues.