Ford 7.3L Power Stroke (1999-2003) :: 4r100 Transmission - Code P0750 Shift A Malfunction
Jun 5, 2017
I bought it 4 years ago with 205K, swapped trans fluid.. 10k miles later (I don't drive it a lot ). I am throwing the code P0750 Shift A malfunction.. i figured id swap the solenoid pack since I am pretty handy and it was affordable.. but it didn't 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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My old 97 f-150's 4R70W started slipping.....so I just installed a rebuilt 98 f-150 unit that had about 10,000 miles on it and also has a transgo shift kit. Got it finished today....and.....
I have an check engine light code p0750 "shift solenoid A malfunction"........when leaving from a stop in Drive, the truck starts going in 2nd gear and just skips 1st gear all together. If I manually shift it, then 1st works fine and shifts through all the gears fine.
But in Drive.. it skips 1st. What to do? or what could be the problem? Where is this solenoid? Can I swap the one out of my old tranny into this one without pulling the whole tranny apart? (I don't mind dropping the pan though...) Or could i have a bad connection somewhere maybe?
Also....When the tranny shifts from 2nd to 3rd the rpms jump about 500 rpm before they drop...kind of seems excessive. Could this be caused by the shift solenoid A malfunction?
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Problems with my 2001 F250 4r100 transmission. Transmission will only shift to 2nd gear when throttle is feathered at @2500 rpm. All other gears shift perfectly. This problem is consistent.
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I have a 4r100 on in a 99 7.3 4x4. The shifting problem I have appears to be intermittant. it seems loose after warm up especially at the 4th shift overdrive and passing gear. possibly due to low presures ? sometimes (lately more often than not) hunts back and forth between 4th and o.d when passing or hill climbing. Under normal driving it shifts somewhat firm with 4th being an exeption.I have changed my crank position sensor filters and fluids which had turned dark and improved slightly. When I pulled the pan and replaced the filter the pan was spotless. No residue or signs of plates or debris. There is about 100,000 miles on the tranny and 350,000 on the truck. Questions: Is there a tcm for this transmission and if so could it cause these problems? I'm considering a purchase of an unlocked 1705 superchip to change the shifting but unsure if this will work for my issues...
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I was pulling the I-40 ascent to Asheville today while empty, got to the top and started down the other side got to semi flat road and the tach suddenly went up about 600 rpm's. Transmission temp about 180*F. I let off, then resumed and everything was fine. About a mile later it happened again. This time the tranny lost 3rd and OD, still had 1st, 2nd, and Reverse. So, we limped into a service station. Temps hovered in the 170-180 range. At this point there are no codes, no lights, O/D is not flashing.
I shut the truck down to check fluid level and current condition. Everything was fine last night. Fluid level is still good and fluid is still red and clean. I changed fluid about 2k ago and the fluid coming out looked almost as good as the fluid going in.
Got back in the truck started it up, checked for codes and got a P0705, put the truck in gear to get to a diesel shop down the road and everything was fine, shifted completely normally through all the gears. This lasted until about 1 mile from home and then the same thing happened all over again. Fluid still looks clean, not burned, still no CEL, no flashing O/D, but only have 1st, 2nd, and Reverse.
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I have a 2000 Ford Excursion 4x4 7.3 with 230K miles, around 15,000 miles ago I replaced the transmission with a rebuilt 4R100, lately I have noticed a leak towards the back end where the transmission and the transfer case connects. Some of the bolts on the bottom of the pan have ATF on them, some others however do not. I have had to add a quart of ATF in the past couple of days in order for it to engage into drive when going from Park to Drive. I have to rev it before it actually kicks in. I'm hoping the leak is just being caused by a gasket either in the pan or connecting the trans to the transfer case..
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my parents have a f350 which now has no reverse. it has a reman sticker on it, 230k on the truck but no idea on mileage on the tranny. shifts 1st through 4th fine, no slip. Tc lockup works just fine. No codes found with my solus scanner. When shifted in reverse it will move back about 2 ft if revved above 2k and then nothing. Am I looking a trans rebuild or is there something I can check and repair with in it the truck?
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I have the 4r100 transmission how do I bypass the safety switch? Also what are your thoughts on starting the engine with the transmission out? I know to bolt the spacer plate to the engine.
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Ok let's start I have a 1999 f350 7.3 4x4 Work Model that I'm have some odd transmission problems. I drove it 20 mins to do a 2hr job no problems finished that got in took off I few seconds down the road it was like the tranny just dropped out no sound just reved no gears at all. So I shut it down tried to start again would not start in park without pulling up on the lever which had experienced here and there for a good while. So got it started went in gear took off same thing went popped out no gears. I started it again this time used reverse same thing as drive so got it where I knew I could leave it but now it would not start in park anymore at all. Next day picked up a neutral saftey switch changed it now it starts in park every time but still starts going looses the gear then have no gears shut it down sometimes had to wait a few then again same issue.
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Installed rebuilt transmission 1 month ago. Have noticed reverse has started to go away. Feels like it is slipping or tires are losing traction with a lot of vibration in the steering wheel.(tires are not slipping that's just the way it feels).. Does it worse when trans is up to temp. I suspect feed bolts but want opinions.(Mark K.) All forward gears seem fine with no issues. I have never been under the pan deep enough to access the feed bolts.
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It's happened to me the last 3 times I've taken my truck out and drove through some deep snow. I have a hard time shifting the transmission from drive to park. The snow must get packed up under the truck near the shift linkages.
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Well, I've been getting a flashing OD light, so doing some research, led me to replace the shift solenoid. I did just that and have yet again the same P0741 code... The truck seems to shift normal but will randomly throw the code and then will not go into Overdrive as well as shift very hard into all gear. Where to look next?
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Well stock trans went two weeks ago so warranty company had another stock one put it (4r100). Finally got the truck today and I noticed my overdrive was flashing. I have no issues though shifts fine speedo works Rpms are normal I checked fuse 19 under the dash that's fine so I'm lost
If I turn the key on I can use the button like normal but once I drive it just flashes. It works but flashes .
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Driving along today my trans started doing some weird stuff. It lost all gears. Forward and reverse. If I turned the truck off and let it sit a while it would go again for awhile then loose drive again. When I got home I checked fluid level and did KOEO o/d off and back on. I drove it around the block and it seemed ok, so I went on my way. After about 20 min I noticed the OD light flashing. I checked codes and It had P1754-ccs.
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Took a 2 hour trip got of the interstate came to a stop light and the OD light starting blinking cut the truck off at the light fired it back up shifted in every gear like normal drove a little ways stopped at a light and OD started blinking again cut truck off back on light. Went away shifted great threw all the gears.
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I have an early 1999 Ford F350 4x4 7.3. I purchased it used about a year ago. The trans was replaced with an ATS 4R100 and a billet torque converter. I have the paperwork for it to confirm it along with the mileage when it was installed. It currently has about 35k on the new trans.
Several months ago the trans heated up to about 200 degrees on my trans temp gauge that was already installed when I purchased it. Not a huge deal and after pulled over and high idling it off I went and no problems.
About a month ago I was towing my fifth wheel when I noticed the temp rising on a level grade. I also noticed the OD light flashing. I made it home and when I went to drive it the next day light was not flashing and it shifted and drove like normal without the trailer.
I towed the trailer again and same thing, OD light flashing and started heating up. I changed all the fluid and flushed it based on the trans flush procedure I got in this forum and replaced with an OEM trans filter. Towed the next day and everything was good. Temp was good and no OD light flashing but I lost 4th gear. All other gears shifted fine, no slipping, just won't go into 4th.
On my way back home the OD light started flashing again and instantly the heat started rising on the trans again. I was finally able to get it into 4th if I let off a little, but as soon as the OD light started flashing I lost it again.
I have a friend of a friend who works for Ford who offered to come over to hook his scanner up. When he hooked it up there was no stored codes from the OD light which we both thought was odd. Took it for a test drive and the OD light started flashing so we could get some readings. He said it showed an error shifting from 1 to 2 and another error when shifting from 3 to 4. I unfortunately forgot to ask him for the specific codes. He tried to read the torque converter info but said my truck was to old and the PID was not supported to read that info.
He said it appeared it was mechanical but without some type of break out box where he can physically shift the gears he couldn't say for sure if it was mechanical or electrical. He did not seem to interested in doing that test for me as he rebuilds trans on the side and said he could rebuild it for me.
It seems my overheating takes place when the OD light starts flashing. It still drives fine and shifts smooth with no issues with or without the OD light flashing. 4th gear usually doesn't work but on a rare occasion it will go into 4th fine which makes me believe it may be electrical.
I am new to diesels but have learned a lot about my 7.3 lately. I recently installed injectors, up pipes, hutch mod, and several other little things so I can get things done myself but am just a DIY'er who can follow good directions. I know very little to nothing about transmissions though.
While working on another issue I did notice there is a large wiring harness that connects up on the driver side of the trans. I unplugged it and was checking the wires and after removing the dirt and crud on it you could see the outside wire sheathing had deteriorated exposing the copper. I bought some liquid electrical tape and sealed everything up. I did look for a replacement wire harness at the time and the one I ordered was very similar but the plug was different so that is why I used the liquid tape at the time. I did not seem to have a problem at the time after fixing it but wanted to mention it here in case that may be an issue.
I also thought swapping out the solenoid pack may fix it. I did not want to drop the trans and send it for a rebuild if I did not need to. I know there are some other sensors associated with the trans like the TSS I think but don't know if they are even related to my issue.
I tried getting the codes from the guy but he does not have them and I can't get him back out. I have an OBDlink device connected to Torque on my phone but I couldn't get it to read trans codes. Could be user error.
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I have a 2001 3/4 pickup. Sometimes the over drive light flashes. When it flashes it shifts really hard and sometimes it won't shift into 4th until I mash the overdrive button. Sometimes the light doesn't flash at all and it doesn't have any trouble shifting at all. Is it a solenoid? Or wiring issues?
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I just bought a 2002 F250 7.3 4x4 auto. It had a TS 6 position tuner installed. In stock mode, I got about 11 mpg. I wasn't too impressed. I found that when I left it in 75hp mode, my mileage went up to 21. I drive easy and try to keep shifts at or below 2,000 rpm. The problem is that, when in any position other than stock, my transmission shifts HARD.
My question is: what's going on here? Does the TS change the transmission shifts? Or is the extra bump in power enough to stress the tranny? Based on the factory gauge, the transmission is not running hot. The fluid is nice and pink with no odors or metal shavings. I'd hate to prematurely kill my transmission, but nearly doubling my fuel mileage is hard to pass up.
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Was doing some errands this morning and on the way home the transmission shifted a little strangely into 2nd. I had to let off the throttle for it to shift.
Fluid levels are correct and not burnt with no residue floating with a pinkish red color. Using Schaeffer's All-Trans Supreme.
I have read all of the threads related to the P0732 and the mechanical diode issue. Does the e99 4R100 have the mechanical diode? If not, what else could it be?
I also have the P0500 VSS sensor circuit fault which an old Ford mechanic stated could be related to a bad fuel sending unit which is definitely bad on this truck.
Am planning to go out and clean the sensor on the differential. Speedometer is working properly. I have also noticed what appeared to be a small slip when in reverse a couple of times that I initially attributed to tire spin. Is any of this related? Should I be prepared to rebuild/replace the transmission?
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5 months ago I brought a f250 7.3 2000 model the car i always wanted and to take a trip around australia but I am having problems with the 4r100 transmission that was rebuilt before i purchased the truck
The problem and checks. Truck taking of in 3rd can manual select 2nd but not 1st
Getting Codes P0715 , P0717 changed turbine speed sensor checked wiring to pcm all ok codes still coming up
Put truck on scanner and found TSS reading when manually in 2nd but not in park neutral or drive
Removed PTO cover to check gear turning that the TSS reads from with the truck up on stands the gear only turns in 2nd when in park neutral or drive it is stopped verifing what the scanner is seeing the scanner also see the gear changes but the transmission is not changing ...
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I bought this truck with a stock automatic transmission and 260k miles back in October expecting the transmission to be the first thing to go. Recently I had a transmission code, OD OFF light flashing, for the bad speed sensor which i got replaced. Then the OD OFF light started flashing after some hard driving when I would put into neutral or park so I took it back to the mechanic, Hanahan Truck and Auto in Sc. They looked into it and there wasn't any different code in the system but they noticed when you lay into it driving it slips some between 2nd and 3rd gears so that could cause the computer to put in a code.
They said usually a rebuild runs from $2k-2.5k and they also recommended a Jasper reman for roughly $2.8k which comes with a 100k mile 3yr warranty. So I figure replacing the transmission is probably the way to go. Any recommendations for a replacement. I've heard ATS and Sun Coast are decent options that I could build one. I'm looking to stay close to $3k. My truck is a 2000 F250 lariat 4x4 with 268k miles. I'm installing an S&B intake, 4" MBRP exhaust, and DP-Tuner's F6 chip when I get the transmission work done.
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