ISPKI
Welding/metallurgical engineer/Metalsmith
Hey all. I want to learn more about the functionality of the E4OD that came in these trucks. I have an E4OD that was supposedly rebuilt or serviced in 2014 in my F-SuperDuty. I separated it from the motor to replace the flexplate due to the starter not being fully mounted and chewing the teeth off the plate, this suggests that it has about 10k on the rebuild. I replaced fluid, filter, pan seal, and FIPL/TPS. While under there, I noticed that the TC was a purple unit with "ATS" written on it and some numbers that were rubbed off somewhat. couldnt make out exactly what they said so not sure what kind of ATS TC it has.
While adjusting the FIPL, I was not happy with the shift point at the recommended voltage, seemed to shift too low, I have it shifting around 2400ish right now unless I get on the throttle pretty hard. The thing is, the TC locks up only if I press the throttle past 50%. There is an in between range when im cruising on the highway where the TC is not fully locked but im cruising smoothly. I cant get the TC to lock up unless I throttle enough to accelerate, so I cant cruise and have the TC locked at the same time.
Does this sound normal? Is there a benefit to having the TC locked while cruising? When the TC locks, my RPM drops slightly, maybe by a few hundred or so. Is it detrimental to the longevity of the transmission to be driving all the time without the TC being fully locked?
Does this even sound like the transmission is behaving normally?
While adjusting the FIPL, I was not happy with the shift point at the recommended voltage, seemed to shift too low, I have it shifting around 2400ish right now unless I get on the throttle pretty hard. The thing is, the TC locks up only if I press the throttle past 50%. There is an in between range when im cruising on the highway where the TC is not fully locked but im cruising smoothly. I cant get the TC to lock up unless I throttle enough to accelerate, so I cant cruise and have the TC locked at the same time.
Does this sound normal? Is there a benefit to having the TC locked while cruising? When the TC locks, my RPM drops slightly, maybe by a few hundred or so. Is it detrimental to the longevity of the transmission to be driving all the time without the TC being fully locked?
Does this even sound like the transmission is behaving normally?