1993 f150 trans problems
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1993 f150 trans problems
I bought a 93 f15 thats been carb swapped from efi. It still has the e4od trans and seems to default to 3rd gear intermittently (sometimes ill start the truck and it goes in D just fine other times I have to shift manually. My question is, what would they have done to bypass the tps? And whats telling the tcm what to do with out the normal tps?
Hotshot
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It sounds like they didn’t do anything to control the E4OD now that the computer isn’t getting input from the EFI sensors. They probably got frustrated since it now didn’t work after taking off all that “fancy” electronic fuel injection stuff.
Frmr Ford Trans Engr
Joined: Aug 1999
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From: SE Florida
I bought a 93 f15 thats been carb swapped from efi. It still has the e4od trans and seems to default to 3rd gear intermittently (sometimes ill start the truck and it goes in D just fine other times I have to shift manually. My question is, what would they have done to bypass the tps? And whats telling the tcm what to do with out the normal tps?
Depending on how cobbled your setup is, they could have done all manner of things to bypass the TPS. None of them will work properly. Without a TPS input it will never shift correctly. If you switch to an aftermarket controller you will still need a TPS input. There is no way to schedule transmission shifts without knowing where the accelerator pedal is.
Logistics Pro
Joined: Mar 2005
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From: Mexico, Missouri
Yeap, an AOD or C6 for an automatic, or go manual and be done. Either of those swaps will work, just hate losing the E4OD transmission.
And if I was swapping to an AOD, I would have it rebuilt with 4R70W internals and all new hardware. I'm not sure what new internals a C6 can be swapped from newer transmissions.
And if I was swapping to an AOD, I would have it rebuilt with 4R70W internals and all new hardware. I'm not sure what new internals a C6 can be swapped from newer transmissions.
Logistics Pro
Joined: Mar 2005
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From: Mexico, Missouri
Thanks for posting Mark. Always glad to see you sharing your knowledge. I forgot about the TPS and the E4OD needing to be tied in.
Yeap a C6, AOD, or manual swap would be the route to go. Maybe someone has done a carb swap with a E4OD transmission and gotten it to work seamlessly.
Yeap a C6, AOD, or manual swap would be the route to go. Maybe someone has done a carb swap with a E4OD transmission and gotten it to work seamlessly.
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Frmr Ford Trans Engr
Joined: Aug 1999
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From: SE Florida
I would think that building a bracket to mount a TPS on the carb would be a lot less work than swapping transmissions.
I think you can use some of the E4OD/4R100 internals. The only difference this would make is that first gear would be slightly lower. It will still be a non-overdrive three speed with a non-locking torque converter.
I think you can use some of the E4OD/4R100 internals. The only difference this would make is that first gear would be slightly lower. It will still be a non-overdrive three speed with a non-locking torque converter.
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Yes. About 15 years ago a kit was available in the Motorsports catalog. I had that done when I had my C6 rebuilt around ‘06.
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It is defaulting to fourth gear, not third gear. There is no way for it to default to third gear.
Depending on how cobbled your setup is, they could have done all manner of things to bypass the TPS. None of them will work properly. Without a TPS input it will never shift correctly. If you switch to an aftermarket controller you will still need a TPS input. There is no way to schedule transmission shifts without knowing where the accelerator pedal is.
Depending on how cobbled your setup is, they could have done all manner of things to bypass the TPS. None of them will work properly. Without a TPS input it will never shift correctly. If you switch to an aftermarket controller you will still need a TPS input. There is no way to schedule transmission shifts without knowing where the accelerator pedal is.
Elder User
Joined: Dec 2016
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From: Mid Missouri
My machine shop guy uses a stand-alone computer for his E4OD in his ‘79 with a 460. It’s the US Shift Quick 2 he installed several years ago and really likes it. It costs around $500 last I looked. He used a stock TPS sensor mounted to his carb.
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