Transmission Question Shift Malfunction 4r100
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Transmission Question Shift Malfunction 4r100
Hi everyone, glad to be apart of this site since i always stumble here from google i figured id sign up.. a quick history on my truck.. i bought it 4 years ago with 205K, swapped trans fluid.. 10k miles later ( i dont drive it alot ) im throwing the code P0750 Shift A malfunction.. i figured id swap the solenoid pack since im pretty handy and it was affordable.. but it didnt seem to do the trick.. it drove around the block good for 5 minutes before it started shifting weird and throwing a code again.. almost seems to be slipping... I still have to check fluid level again and scan the code again but any suggestions? I have an apt to go to the tranny shop this week and would like to avoid the big bucks if possible. 
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a friend just scanned it and said the code was stored in memory for p0750.. he cleared it.. havent tested it yet but did the pcm assume the new one to be the original broken one due to code in memory?
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Okay, Im going to check fluid level tonight and give it another test run since my friend cleared the code in memory... i was under the impression i could clear the code without a scanner? My srt-4 used to clear codes with a battery disconnect, is that not the case for these diesel trucks mark? Thanks for your help!
Frmr Ford Trans Engr
Joined: Aug 1999
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From: SE Florida
Sometimes they do, sometimes the batteries have to be disconnected for quite a while to clear the codes.
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I read something about the pcm being screwed up.. i have an aftermarket DP pcm in there if i remember correctly.. do you think i should pick up a stock for hahas? I wanted to avoid the shop but i believe its going there this weekend.. i need it bad to do repairs at my house... thanks for the help mark
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It was a snap on solus.. for some reason my previous message didnt post.. is that scanner sufficient?
Frmr Ford Trans Engr
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I'm not sure. Maybe someone else knows?
My guess is that it isn't sufficient. If it won't shift there should be codes set for the missing shift. Those codes can't be read by most scan tools.
My guess is that it isn't sufficient. If it won't shift there should be codes set for the missing shift. Those codes can't be read by most scan tools.
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also mark I used this part to replace.. is it correct?
dorman 609-023
i have a 99 f350 build date 6/99
Frmr Ford Trans Engr
Joined: Aug 1999
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From: SE Florida
It doesn't learn that. The part attached either works or it doesn't work.
Worst case all that the shift lever wires could do is keep it from shifting to fourth gear. [/quote]
I believe that is the right solenoid body. The shift solenoids are the same on all the 4R100 solenoid bodies, only the torque converter clutch control solenoid is different on the '99s built before January 1999.
Worst case all that the shift lever wires could do is keep it from shifting to fourth gear. [/quote]
I believe that is the right solenoid body. The shift solenoids are the same on all the 4R100 solenoid bodies, only the torque converter clutch control solenoid is different on the '99s built before January 1999.
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It doesn't learn that. The part attached either works or it doesn't work.
Worst case all that the shift lever wires could do is keep it from shifting to fourth gear.
I believe that is the right solenoid body. The shift solenoids are the same on all the 4R100 solenoid bodies, only the torque converter clutch control solenoid is different on the '99s built before January 1999.
Worst case all that the shift lever wires could do is keep it from shifting to fourth gear.
I believe that is the right solenoid body. The shift solenoids are the same on all the 4R100 solenoid bodies, only the torque converter clutch control solenoid is different on the '99s built before January 1999.
And thanks for the help!
Frmr Ford Trans Engr
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From: SE Florida
That's the solenoid that locks and unlocks the clutch inside the torque converter. If you have a mismatched solenoid to the hardware in your transmission when the torque converter clutch is engaged it is going to SLAM on.
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