Thinking
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From: Utah
If it dies, or almost dies, it's probably your TCC solenoid. Otherwise, it could either be the TCC, or a valve body issue.
It does have enough fluid, right? Mine was a quart low once, and had one hell of a TCC slip.
It does have enough fluid, right? Mine was a quart low once, and had one hell of a TCC slip.
Thread Starter
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From: Alaska
That's a toughy, AK. Being a 97 4.6, I think the cylinder 4 misfire is probably just a coincidence, or you'd have a cylinder 8 misfire too (assuming spark is the issue). Trying to think of why you'd have forward, but no reverse that would be electronic.....
Maybe the direct short took out part of the PCM, and it's an injector not working....
Maybe the direct short took out part of the PCM, and it's an injector not working....
Last edited by akdoggie; Nov 18, 2019 at 05:25 PM.
Thread Starter
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From: Alaska
Coil cured the misfire. That's a start. I hate trying to diagnose a problem 60 miles away. lol
I told him to pull the pcm from the 150 in the yard and see if it will go into reverse. Not the correct Expy puter but same year 150 same engine/trans. Should give him an idea at least. I don't want t o to drive out there if I can help it. I told him to run the codes now, before pcm swap, leaving out p0304 and p0307. We will see what happens this way. Then he can swap pcms.
I told him to pull the pcm from the 150 in the yard and see if it will go into reverse. Not the correct Expy puter but same year 150 same engine/trans. Should give him an idea at least. I don't want t o to drive out there if I can help it. I told him to run the codes now, before pcm swap, leaving out p0304 and p0307. We will see what happens this way. Then he can swap pcms.
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From: Utah
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From: Michigan
Looking at the above post on the misfire. My buddy in Sutton called and wanted info. A friend put in a 24 group battery into his 97 Expy. He closed the hood, he shorted the battery to the panel. He now has a #4 misfire (4.6) and the trans won't shift into reverse. Forward yes. Vehicle was fine until the battery shrted.
Thoughts before I go rip apart a repair manual??????
Thoughts before I go rip apart a repair manual??????
Edit: on the 97 Expedition the sensor is part of the neutral safety switch per Rockauto.
Last edited by River1; Nov 19, 2019 at 12:48 AM.
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From: Michigan
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Joined: Dec 2015
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From: Utah
AK, so my Buddy got the OSS thing sorted out. Now he has reverse only - maybe our two Buddy's can pull together and get one operable trans, lol. He messed with the PRNDL/TRS while he had it out, so I sent him a video by FTM to show him how to set it.... easier than me trying to explain it over the phone.
Last edited by white89gt; Nov 19, 2019 at 06:46 AM.