Hunter32
Well-Known Member
- Joined
- November 30, 2011
- Messages
- 189
- Reaction score
- 13
- City, State
- Edgewater, FL
- Year, Model & Trim Level
- 1996 Explorer 5.0
Hey Guys,
I'll start with this--everyone loves a badass picture of a beloved Ford Explorer, so here's mine:
I've been having some issues lately with my transmission on my 1996 5.0L Explorer.
My Explorer is a '96, but when I did my 2WD -> 4WD SAS swap, I installed a 1998 Explorer 4WD transmission. This required re-pinning of the transmission harness, per the diagrams below:
I'll note that the truck has run great since I did the swap without these issues, so it is not related to the pin-swap.
I initially noticed an issue when taking off from a stop--it seems sluggish, then it catches up with itself and shifts fine through the gears until it is supposed to shift into overdrive; but it will not shift into overdrive. Pressing the O/D ON/OFF button does not do anything, nor does it light up the O/D ON/OFF light on the dash.
On occasion, I've caught the O/D light flashing, and it has 'bucked' when trying to shift into O/D when letting off the gas at speed, but neither are consistent.
I've pulled the codes from the CEL and initially I saw these:
P0136
P0141
P0402
P0443
P0500
P0743
P0750
P1506
(Mind you, it's been years since I ever pulled codes from this truck, but these ones were listed as CURRENT)..
The EGR/emissions codes don't concern me much right now and I don't consider them related to my transmission issues right now, so just disregard--
I'll note too that my speedometer stopped working about 1.5 years ago, which I've learned to live with and hasn't bothered me too much, but that vehicle speed is properly reported real-time on my OBDII reader, so the issue with that shouldn't be the VSS itself, rather most likely something behind my dash. I've replaced the VSS several times trying to diagnose this speedometer issue initially to no avail, so the VSS is relatively new.
Once I pulled these codes, I cleared them and continued to drive the truck for a short period to see which one(s) came back first. Here's what I got:
Though none of these were active.
I once again cleared those codes and drove around (all symptoms were still ongoing), re-pulled ETC's and found:
I repeated this several times to determine what codes were coming on first and coming on consistently.
The P0500 comes back, as both active and historic, but consistently. (Again, not worried about the active evap system ETC at this time).
If driven further distances, most of the remaining ETC's come back as well. For instance, these came back after just afew more driving miles, although after at least one engine start cycle too:
After clearing, another day of seeing ETC's, the first ones to pop up are:
I've included as much background information as I can to help y'all get a better understanding of what's exactly going on here, so thank you if you've stuck with me this far--
My question to you guys is this:
Do these codes, in conjunction with eachother, point to something specifically? A harness connector instead of individual component malfunctions? Can anyone here verify that all of these codes deal with the PCM, or a certain connector/harness that I should take a look at before I start replacing transmission solenoids?
Would a faulty internal transmission harness lead to these ETCs? Faulty PCM?
Any and all help you can provide would be great!
Thanks
I'll start with this--everyone loves a badass picture of a beloved Ford Explorer, so here's mine:
I've been having some issues lately with my transmission on my 1996 5.0L Explorer.
My Explorer is a '96, but when I did my 2WD -> 4WD SAS swap, I installed a 1998 Explorer 4WD transmission. This required re-pinning of the transmission harness, per the diagrams below:
I'll note that the truck has run great since I did the swap without these issues, so it is not related to the pin-swap.
I initially noticed an issue when taking off from a stop--it seems sluggish, then it catches up with itself and shifts fine through the gears until it is supposed to shift into overdrive; but it will not shift into overdrive. Pressing the O/D ON/OFF button does not do anything, nor does it light up the O/D ON/OFF light on the dash.
On occasion, I've caught the O/D light flashing, and it has 'bucked' when trying to shift into O/D when letting off the gas at speed, but neither are consistent.
I've pulled the codes from the CEL and initially I saw these:
P0136
P0141
P0402
P0443
P0500
P0743
P0750
P1506
(Mind you, it's been years since I ever pulled codes from this truck, but these ones were listed as CURRENT)..
The EGR/emissions codes don't concern me much right now and I don't consider them related to my transmission issues right now, so just disregard--
I'll note too that my speedometer stopped working about 1.5 years ago, which I've learned to live with and hasn't bothered me too much, but that vehicle speed is properly reported real-time on my OBDII reader, so the issue with that shouldn't be the VSS itself, rather most likely something behind my dash. I've replaced the VSS several times trying to diagnose this speedometer issue initially to no avail, so the VSS is relatively new.
Once I pulled these codes, I cleared them and continued to drive the truck for a short period to see which one(s) came back first. Here's what I got:
Though none of these were active.
I once again cleared those codes and drove around (all symptoms were still ongoing), re-pulled ETC's and found:
I repeated this several times to determine what codes were coming on first and coming on consistently.
The P0500 comes back, as both active and historic, but consistently. (Again, not worried about the active evap system ETC at this time).
If driven further distances, most of the remaining ETC's come back as well. For instance, these came back after just afew more driving miles, although after at least one engine start cycle too:
After clearing, another day of seeing ETC's, the first ones to pop up are:
I've included as much background information as I can to help y'all get a better understanding of what's exactly going on here, so thank you if you've stuck with me this far--
My question to you guys is this:
Do these codes, in conjunction with eachother, point to something specifically? A harness connector instead of individual component malfunctions? Can anyone here verify that all of these codes deal with the PCM, or a certain connector/harness that I should take a look at before I start replacing transmission solenoids?
Would a faulty internal transmission harness lead to these ETCs? Faulty PCM?
Any and all help you can provide would be great!
Thanks