Ford 7.3L Power Stroke (1999-2003) :: Transmission Stays In OD Off Position Until Hit 55 Mph
May 30, 2016
I've read a few things on the 4R100 and have a question.
My transmission stays in the OD off position until I hit 55 mph no matter the tune I am using and then will up shift to OD. It turns back off once I drop below 30 mph.
I was told when I bought the truck that it was a factory tow package. Is this a thing?
I would like an option to turn it off when I'm not towing or climbing a hill if I can.
Any way to modify it with a switch?
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Ok so i have an 02 F350 7.3 with 89k on it ... Ive had the truck about 2 years now and ever since i bought it the ABS light has been on. So finally i got to scanning it and codes popped up for the front speed sensors and the rear speed sensor. So i went ahead and just put all new MOOG hub assemblies in the truck which come with the speed sensor already in the them and i also replaced the rear speed sensor, which was difficult!!! Becuase the bolt was seized and i ended up have to drill and tap a new one and even then the sensor seats in the hole in the diff but doesn't seat flush with the housing if you really tighten it down, and it leaked a little fluid at first but i ended up loosening up the bolt a little to make it seat better and then i put silicone around the bottom of the sensor and it stopped leaking... Anyway I've fixed both the code issues and cleared them, BUT, the rear speed sensor code pops back up immediately after clearing it and the ABS light on my dash stays lit .... Idk what to do at this point because I've fixed everything and it still pops the code for the rear sensor, I just want the Light on my dash to go off thats all ! ...
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Why the heck would my dome lights (front and back) stay on while I'm driving and when the truck is off KOEO and locked? It's not the reading lights, those I can turn on and off at the switch on the light, it's the lights in between them.
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Two years ago I acquired a very very nice 2001 F350 DRW crew cab. The person I purchased it from put a Remanufactured 7.3 in it and set the truck up to pull wedge trailers. He put 25K miles on it and put it on Craig's list where I found it. It just turned over 300,000 miles.
One of the changes he made was to install a 70 gallon fuel tank in the frame rails below the bed. He told me that when the gauge reads EMPTY there is still 20 gallons in the tank. I remember him telling me that this anomaly is due to using the stock Ford pickup in the larger tank.
I have never filled the tank because so far the truck is used locally. I usually put 10 to 20 gallons in and when it gets to E I do the same fueling.
Then one day I turned the key on and the needle went up and beyond the full indication.
I can get under it and maybe the tank has some name or model number on it.
The truck runs fine, but the gauge concerns me. Eventually the truck will be making round trips from Chicago to our retirement home in Santa Fe, NM. It would be nice to have a working fuel gauge!
I have spoken to the person I purchased the truck from. He installed the tank as part of a complete upgrade that included a re-manufactured 7.3. The fuel tank is a 67 gallon Titan mounted between the frame rails. He believes that the original Ford sending unit was installed. That means it has 300,000 miles on it. I had the truck on a lift yesterday and it is a very tight fit. The garage said the best way to do the repair is to remove the bed. Six bolts, disconnect the tail lights and the 7 pin trailer connector and it is off.
So, my questions now are... Should I stay with a new Ford sending unit or are there better ones to install? Are there any other updates to the fuel delivery system that should or could be done at the time?
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long time ago i had to change master cylinder and the calipers on the fronts and the break fluid well i decided to test it out and see if they were working fter i was done with them then the light on the dash came on i thought its because the floating thing in the master cylinder was not floating which was not the case i dont think its the sensor i also lost my emergency break shoes never replaced em
01 f250 2wd 7.3l v8 diesel straight pipe 310,xxx
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Trying to be proactive seems to have backfired on me. What to do? Pull sensors and clean? Checked codes points to both left and right sides.
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Is there a mod that allows the headlights to stay off when the key is in the on position. 2001 F250....
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Ford catalog does not list the TPS for a 1999 7.3 Super Duty as a separate replaceable part which leads to replacing the whole throttle pedal assembly. I found this to be incorrect. If you have a throttle pedal assembly with separate TPS (separate 3 wire connector) and IVS (Idle Validation Switch 2 wire connector) just the TPS can be replaced.
This is a pic of my 99 with new TPS installed : [URL] .....
Without removing the whole assembly you only need to remove the 2 T25 screws and the connector to replace.
Since this part is listed for more then 20 Ford trucks I figured it would work in my 99 7.3. I bought a brand new TPS from Pete (F250_) that he could not use. He has a 2002 with one 5 wire connector. It works perfectly in my 99. Not sure if it will work in a 2000 or 2001 but if the TPS and IVS each have their own connector it should. Make a visual inspection to be sure.
Part DY-967 or F4SZ-9B989-AA - Potentiometer
I was going to go with a Dorman TPS but like PartsGuyED likes to say "OEM Baby". The OEM TPS through Ed is actually cheaper then the Dorman.
Side-by-side pic of the old and new TPS. Only the center rotating part is different but it fits and works just fine. It also has a better fit so there is less slop and almost immediate response.
NewOldTPS.jpg?t=1269362105
By the way, the original TPS was working fine so I have no idea what the symptoms of a bad TPS are. Since it was available I replaced it to have a spare and to see if this one would work. Both Pete and I thought it would and we were right.
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So the idea has been kicked around before, but to my knowledge no one yet has done it on FTE. That is, a lighted display switch for our chips that only lights up the current position. Well, I've got it done!!
First some pics, then read below for how I did it. First pics are in the light, the next two are how it looks in positions 1 & 5 at night.
Now, for how I did it. First off, I started with one of the lighted displays from BCPD. Each number has an individual LED behind it, so I could wire up each one for the position it's in.
The back of all the chips have 7 wires attached to it. One is black, it's in the middle, and it is a common ground to the chip. The other 6 wires are all position grounds. The switch works by grounding one wire to the black wire for the position you are in. If you look at where the wires plug into the chips, the one farthest away from the black is position #1, and they count up sequentially from there toward the black wire.
First thing is to unplug the the selector **** cord from the chip before doing any work. I acutally ordered a spare switch from Jody, just in case I screwed up something (which I didn't), I wouldn't be without my chip.
I took the black rubber off the back of the switch to access the soldered connections. I soldered the ground for each LED on the display to the appropriate pole with the wire connected to it on the back of the display. I had some CAT 5 ethernet cable lying around, and I used the wires inside of it for the ground from the switch to the display. You can use a DVM or continuity tester to check for continuity between the black wire and each position to veryify which wire belongs to what position. I ran the extra wires out the bottom of the rubber cover, along with the original wires.
For power, I only wanted the lights to be on at night. So, I tapped into the wire for the gauge lights, put a 1 amp inline fuse (old glass type fuse), and connected all the hot wires of the LED's so they are a common hot. The LEDs already had resistors wired into them, so I didn't need to add any more.
The fit for everything where I put it was a little tight, but I eventually got it to fit, as you can see. And all the lights do work, and show up quite well at night. The display works by having a common hot to all LED's and grounding the one that for the position it's in, completing the circuit and lighting the LED.
Some other ideas would be to wire up 6 different colored LED's to constant power and place them somewhere else, say in the A-Pillar, dash, or on the door to the inside of the mirror. So, you'd have a different color LED for each position. It's not limited to using the BCPD display, that's just what I already had. The creativity is up to you on how you'd choose to light things up for each position.
Finally, I did talk to Jody about doing this and any negative effects it would have on the chip. He said there would be none, since you're just pulling a ground from it. Also, if you use an LED, they are by design only allowing current to flow in one direction, since they are diode's already. But, to be on the safe side, I used the 1 amp fuse on the power wire. You won't need any bigger than that as the LED's don't draw very much power at all.
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Here are some signs of the problem.
*Key fob does not work - battery is good.
*Interior overhead light works only on manual.
*Driver's auto door lock (with driver door open) will lock all four doors but the driver's door will automatically open back. To secure the truck I manually lock the driver's door.
*I replaced the driver's door 'ajar switch' with no results. The old switch was good after testing - normally closed until the ball is depressed then it goes to open.
*No codes.
*I just checked all the mini-fuses with a VOM and they are good.
*Could one of the relays be part of the problem?
I am curious if there is a scanner that can identify the bad door ajar switch if any?
From what I have read so far it appears the VSM (Vehicle Security Module) may be bad as a many of these 2002's complain of this problem and the VSM generally solves the issues. Are there folks other than the dealerships that can program the module if I purchase a new one and remove the old OEM one? Other than the inconvenience the truck runs fine other wise.
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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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When I position the switch into 4x4 High or 4x4 Low the dash lights do not come on. Also, I have a vacuum leak at both hubs.
I tested the vacuum lines from the ESOF solenoid (or whatever it's called, the box on the fender where the vacuum lines originate) and I don't have any leaks in the lines. I put the Mighty Vac straight to the back of the hubs and I definitely have leaks at both hubs.
So, why am I not getting the light on the dash, and why do I have leaks at the hubs? FWIW, I replaced both wheel hub assemblies in March, and everything worked fine at that time. I'm hoping the yellow o-rings are still good. Is there a chance I lost torque on the four bolts behind the hubs causing a failed seal? Is there a seal on the outside of the hubs that could've failed?
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Last year I did some major work on my 02. Painted it, new injectors, 38R, and once it was back together, the transmission went south in a month. Got a Ford reman HD4R100. Shortly after the install, when in reverse, the torque convertor would lock up when you stepped on the throttle. As soon as you let off the throttle, it would disengage. Thinking it was a tranny issue, got another one from Ford. This one has been in the truck for about 9 months. And it seemed fine until about a month ago. It started doing the torque convertor lockup thing in reverse like the last one, but not as often.
Then last weekend it did it every time I put it in reverse. Then yesterday, while pulling away from a traffic light, there was a loud bang, and lost power in the transmission. Once stopped, I found out it has manual 1st and 2nd, but nothing else. No drive, overdrive, or reverse. I personally believe something electrical led to these issues, and ultimately, the transmission failure. I know the truck is not stock, but I do not run it hard very much. When it went bang yesterday, I was not being hard on it. Where to look at what is causing this?
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What's the truth behind the deep pan automatic transmission pans? I hear they are supposed to carry a few extra quarts of transmission oil and result in lower transmission temps. I've also heard this is not true since the amount of fluid going through the transmission cooler over a period of time still remains the same and therefore will not provide any lower transmission temps.
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I let a small leak that I thought was engine oil go too long it appears before checking the transmission which had still been working ok. I added a whole quart of Lucas and then another quart of Mercon so the level was pretty low. What to do next as I am about to leave Alaska and go back down the highway. Is my ZF trashed now? Still seems to work fine. Or is there a seal somewhere that I can change?
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Transmission rebuild? I seen a few threads where people talk of it but no follow up. I've heard it takes special tools but then so does a lot of things we shadetree on our own....
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Picked up my truck from the local transmission shop yesterday and on the way home (less than 3 miles away), I noticed the ABS light was on. I turned around back to the shop but the guy behind the desk couldn't pull the codes (his mechanics smart with codes don't work Saturday). So I will head back tomorrow when his code-smart dude is back but was wondering is there anything they could have done during the tranny install to muck up the ABS system? Or do they need to do something because of the new transmission?
I checked the #15 5-amp fuse under the steering wheel but it looks good. Truck runs good to me and shifts fine in the 10 or so miles I drove it yesterday but I'm not savvy with transmissions or ABS.
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My tranny is acting odd. I put in drive and seems to slip a lot in 1st, barely even move at some times. If I put it in 1st with the shifter it goes in and grabs then I can shift up to 2nd or drive and there aren't problems. It drives normally when not from dead stop.
Transmission has 50k miles on it since replacement. Fluid level is normal. I don't tow and drive it particularly hard. I will have to go back and look at miles since last fluid change. I should be right around 30k miles since last change.
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2001 7.3 auto with 188k miles. Supposed to have had a new tranny at 99k miles. Fluid nice and red with no smell.
Here's problem: during the 3rd shift (gear before overdrive), and between 40 and 50 mph, I get a small vibration in tranny. Seems to be just that shift. It's not noticeable if I run it a little harder on the shift (speed up). If I let it lag on the shift, the vibration is worst. All other gears seem ok.
Questions:
1. I believe I have a 4R100. It has a drain plug, but how do I confirm?
2. I have a couple different scan tools. Should I be getting codes if I have tranny problems? Or is there a scan PID I can check?
3. I was thinking of starting with fluid change. Since it probably hasn't been changed since 99k miles.
Last question: any detailed write on fluid change handy? That would include type of fluid, filter part number, etc?
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Running dual coolers? I just got a new transmission not too long ago and want it to last. Was looking at this mishimoto with fan. That way in the winter i can deactivate it and use it while towing or summer. Also the way I see it if I leave the stock cooler in place it's one less thing to mess with.
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I recently bought a 1999 F250 Super Duty 4x4 7.3 Powerstroke MT with 280,000 miles. The reverse is out and after reading several posts am I to understand that any ZF6 well interchange in it or is it year specific. Guess what my question should read "What year vehicles well the transmission interchange and that there isn't any difference between trucks that run this motor with MT except for the powertrain, like F250 F250 super duty F350 and so on. The second question is how hard would it be to fix the reverse myself. I do have some mechanical experience. Except for the reverse, the trucks run perfectly.
This is my first diesel truck . I'm also confused because it has an adjustable gauge mounted on the bottom of the dash that you can select the performance from. I was told it has a performance chip and that's what that was for. I was told by the man I bought it from that the truck had been bullet proof but I don't know a thing about diesel upgrades or what to look for if it has. Except for reverse, everything works. Low high 2x4 & 4x4. Got it because he had to pay the bail bonds man. Guess I got a deal on it I was told.
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