I went through this, but the other way, Older van using new trans. FORDF250HDXLT is right on
the money. In addition is using the right MLPS, oh man, that was a PITA. For the C6, it will be
looking for a NSS (Neutral Safety Switch) signal so you can start the engine, so possibly you could
jumper those two wires. There were two other wires relating to the Back Up lights that run
through the MLPS/Range/NSS sensor.
Shift linkage will have to be fabricated, NO bolt in available, they cross-overs operate differently.
I found a 4 bolt 3-disc Torque Convertor that fits the E4OD. You might be able to find the opposite
not sure. Rear Trans mount is about 4 inches forward on the C6 (I think,) and the rubber mount
is different.
The 1992 E350 idi ECC is rudimentary, so you might be able to jumper some of the signals, not
sure on the VSS though. 7.3 should be able to have any signals bypassed, I just don't know about
that part. I figure it the trans is pulled, and you can start and run right now, then you can keep
doing that, and any speedo input is not going to screw your controller up since the C6 will not
offer any parameters.
I'm still pretty fresh from doing this (reversed,) and there was a bit of head-scratching to get it
right like it belonged there.
The E4OD cases (for DIESEL) interchange internally, except for the shift servo, which is a pretty
cheap part if that needs to be changed. I have a feeling there are quite a few Diesel case transmissions
circulating out there with Gas internals, mine was that way when I bought it, but I rebuilt and
upgraded the whole thing, so overcame that issue.
Even the dipstick tube was a bit of fabrication, you should try to get that from the C6 you are
getting if it is from a Diesel Van.
Couple other things, but can write them out just yet, I'll revisit this.
Best regards,
George