Good morning everyone,
I picked up a 2WD E4OD the other day for my project F-150 IDI swap. The truck is a 90 (mechanical speedo) and the trans is from an OBS, door sticker of the donor truck said 94, was behind a Powerstroke. Compatibility is obviously a problem with the output shaft. I've been searching the forums and reading solutions and I've come down to a few ideas, but need to know if I've misunderstood them and which is going to be my best option:
1. Replace the output shaft with the correct one. The 2wd shaft with speedo gear seems elusive in this day and age, does anyone know where I would even find one (junk yard is obvious, but I don't want to buy an entire transmission for one hard part if I can avoid it)? Since the transmission would need to be torn down in the process, this one quickly adds up to $$$ just to make it work.
2. This one may be wrong, but i saw it suggested, pull the tail housing and install a gear on the current shaft. Is this even possible? There was mention of a keyway in the shaft to accommodate it, but this is all tough to decipher without pictures. When I remove the block-off plug from the tail housing I see splines on the shaft which I "assume" mesh with the speedo gear, but this is all new to me.
3. Swap the speedo with an OBS PSOM unit, modify the wiring from the RABS in the diff and plug it all up. Anyone here currently done this? Sounds easy enough, I would just need to figure out what goes where and how it's wired. Would I need a controller for this or would the RABS work to control the transmission as well?
If anyone else has some "aftermarket" ideas on this, I'm all ears!
Also, so the thread doesn't run away off topic, I already have the correct convertor, solenoid pack and shift linkage for my year truck ready to swap in, but if there are other swap considerations, please let me know.
Thank you guys for reading.
I picked up a 2WD E4OD the other day for my project F-150 IDI swap. The truck is a 90 (mechanical speedo) and the trans is from an OBS, door sticker of the donor truck said 94, was behind a Powerstroke. Compatibility is obviously a problem with the output shaft. I've been searching the forums and reading solutions and I've come down to a few ideas, but need to know if I've misunderstood them and which is going to be my best option:
1. Replace the output shaft with the correct one. The 2wd shaft with speedo gear seems elusive in this day and age, does anyone know where I would even find one (junk yard is obvious, but I don't want to buy an entire transmission for one hard part if I can avoid it)? Since the transmission would need to be torn down in the process, this one quickly adds up to $$$ just to make it work.
2. This one may be wrong, but i saw it suggested, pull the tail housing and install a gear on the current shaft. Is this even possible? There was mention of a keyway in the shaft to accommodate it, but this is all tough to decipher without pictures. When I remove the block-off plug from the tail housing I see splines on the shaft which I "assume" mesh with the speedo gear, but this is all new to me.
3. Swap the speedo with an OBS PSOM unit, modify the wiring from the RABS in the diff and plug it all up. Anyone here currently done this? Sounds easy enough, I would just need to figure out what goes where and how it's wired. Would I need a controller for this or would the RABS work to control the transmission as well?
If anyone else has some "aftermarket" ideas on this, I'm all ears!
Also, so the thread doesn't run away off topic, I already have the correct convertor, solenoid pack and shift linkage for my year truck ready to swap in, but if there are other swap considerations, please let me know.
Thank you guys for reading.
