Ford Transmission :: 1993 F150 - No Reverse When Warmed Up In AOD
May 18, 2014
When truck warms up I lose reverse. I changed fluid and tranny filter and I am still having the problem...
View 1 RepliesWhen truck warms up I lose reverse. I changed fluid and tranny filter and I am still having the problem...
View 1 RepliesMy 95 f150 stalls in reverse. It goes fine forward and idles fine in reverse but if I give it quite a bit of gas it starts stalling. We've put a new mlps and that didn't fix it. Then they thought it was the convertor so I got the trans rebuilt and still no change. I'm about to pull my hair out over this deal. I don't even have enough power to back up a trailer or back up a hill.
View 11 Replies79 F150 400/C6 2wd. Loss of reverse and it doesn't want to stay in high.
Strange thing happened today. I took my truck on it's longest test drive since rebuilding the transmission. It was about 25 miles. I got to the junk yard just fine and it was running just fine when I left. I went through a drive through to grab a burger and headed home. That's when it started acting funny. It shifted fine 1st to 2nd, then 2nd to 3rd, but it wouldn't stay in 3rd. It would shift into high, but the slightest bit of throttle and it would shift back into 2nd and eventually got so bad that it just stayed in 2nd, so I had to return to the town I was leaving.
I drove to an autoparts store nearby. I decided to move where I was parked and when I put it into reverse, nothing was there. It rolled back. I drove it to the new spot and called for a tow truck. Weird thing is that reverse worked just 10 minutes earlier when I left the junk yard. When I got it home 2 hours later, it backed up under it's own power. I let it cool down completely and took it for a test drive and it drove perfectly. I have a few theories or questions:
Kickdown rod: Can it be in such a position that it could take away reverse? I would assume that if the spring wasn't returning it all the way forward that it wouldn't have shifted from 1st to 2nd properly. I ask this because I am not using the Holley spring mount and I'm wondering if the wrong spring set up allows the kickdown to be partially activated.
Fluid: What fluid are you suppose to use after a rebuild and what fluid can't you use. Mercon V says it supercedes earlier fluids, but is that wrong?
Am I wrong to assume that if fluid was the problem that I would have had problems with 1st and 2nd?
Cooling: What are signs of hot fluid other than smelling it. Once again, assuming I would have problems with all gears if fluid was too hot.
My guess is that something is sticking in the valve body, but before I drop the pan and pull out the valve body, I want to make sure all other avenues are exhausted.
I have a 89 f-150 xlt with what i believe is the m5od (4 speed with O.D) transmission and the 5.0 motor, the trans has been whining since I've owned the truck and it started popping out of reverse on me a couple months ago, now i have to slam it into gear to make it go anywhere even when I am going down the road! The clutch is fine but the trans is hanging up, anyways i have a granny gear transmission a buddy of mine gave me out of an 85 f150 that had the inline 6 if i take the bell housing off of my transmission can i put the internal slave cylinder on that transmission? Will it work or will i have to find a way to put an external slave cylinder on it?
View 9 RepliesReverse stopped working after it's been driven for a while. It works when it's cold. I'm actually hoping this was caused by my stupidity (though it may have nothing to do with the problem). A while ago I wanted to change my oil, but opened the auto transmission plug instead. I decided to put new trans. fluid in it. I thought I would add trans fluid until I could see it on the dip stick. After the problem with reverse started I tried to again read dip stick but can't tell where the level is, so I decided to drain trans. fluid to measure it. Owner's Manual calls for 8.8 qts. Drained fluid measured only about 4 qts. I added more. Now it looks like dipstick shows it ~2 inches above the full/hot mark. Questions:
1) Would fluid level affect reverse and not forward (with which there is no problem)?
2) Is method of draining trans. fluid & measuring it a valid way of telling how much is in it, i.e. would all... or most... fluid drain out so the 8.8 qts. in the owner's manual should be added back in?
3) Am I misreading the dipstick? I've tried letting it set for 4 or 5 days, but still fluid seems to smear high on the dipstick.
My Aerostar is a 93 extended EB with 4.0, AT, 212k mostly reliable miles, and blue and gold paint that has held up remarkably well. When started it runs great; smooth idle, easy revs, normal as can be. But when that third pip on the digital temp gauge hits Normal the van becomes possessed. The idle will randomly drop or surge or return to normal, the check engine light will come on for a few seconds then go off, all without pattern, just kinda crazy. Today I held it at 2k rpm, then it bogged down to like 800 rpm and lit the CEL, then it returned to 2k rpm and the light cleared, swung up to 2.5k, all while I hold the throttle steady. The light does not always come on when it bogs. I see no black smoke from the exhaust and it smells normal, but it was kinda windy today.
The check engine light is not lit otherwise so I assume no hard codes are stored. I think I found the code retrieval process for the OBDI but I have not done that yet. After reading a bit in this forum I thought to clean the MAP sensor, but I do not have security torx bits to remove it yet. As background a few years ago it had an oil leak from the top rear which I ignored, and it slowly rotted a harness back there till one day the harness died leaving me running on 3 cylinders. My local Speedy Lube guy was ex Ford dealership and knew Aerostars, he did the diagnosis and repair and said it was a common problem. But he has moved on. I was also told I have a torn boot on a plug wire, but there's no way to get my ham-like paws back in there, from front or back, to verify or replace. I mention all this as background, I doubt a bad plug wire is the issue here.
It seems like an odd problem to me because the only pattern is related to operating temp. It is not a constant problem, not an intermittent glitch, but it very definitely goes nuts right when it achieves normal temp. Aside from pulling the codes, which I will figure out tomorrow, any other tests I can run to diagnosis? Any way I can trick this thing into thinking it is cold all the time?
Have a 93 Bronco, 5.0. replaced battery, IAV and had a complete tune-up. Now starts great, runs fine until it gets warm, than in about 5 - 10 minutes the idle starts to fluctuate. A little at first but eventually between 1000 to 300 rpm and will stall if you don't give it some gas. Turn it off, restart, starts fine and runs OK again for a while.
View 2 RepliesI have a 1993 Geo Prizm with about 120,000 miles, it recently developed a problem where once it is warmed up, it will not start. It starts right up when it is cold first thing in the morning, but once I drive it for 15-20 minutes, if I shut it off, and then turn the key to restart it, nothing happens, no crank, maybe just a small hum. I took it to my mechanic and he cleaned the battery connection and thought it had fixed it, but the next day it did the same thing. Also, it runs fine until it gets shut off, even if I leave it running for hours, it runs fine until I turn it off and then it will not start again for about an hour.
View 5 RepliesI have a '93 Toyota Celica Standard transmission. Recently it's been lagging in power. Only happens after it's warmed up. I'll be driving along and it just seems to lose power. Have to stomp on the gas to get it to kick in. Also, at the same time, when stopped it idles really low. Cold, no problem. Took it to Toyota dealer to have it diagnosed. I Stated that it might be the MAF sensor. They checked it out and said it needed a major tune up (to the tune of $700!) Now, I know it needs a tune up, but the symptoms don't seem to correlate to that being the problem. I asked about the MAF sensor and they said no diagnostic codes came up. Is it possible the air filter is clogged? Can the sensor malfunction intermittently?
View 14 Replies152000 miles. Religious oil changes at 3000 miles. New plugs before this started.Drove about 60 miles on a warm day. Ran fine. Went to start it again, it seemed to be running on only 5 of 6 cylinders. Carefully limped it home. It did not overheat (stayed at normal temp) and the engine never died. The next day I pulled each spark plug and had a look. They all looked fine, none looked fouled. The dead cylinder was not obvious. Started it up, it ran great. This was an even hotter day, drove off to do errands. Probably drove 5 miles. Stopped, and when I started it up again, the miss was back! Went home, and while it was still running crummy, tried running it with one plug disconnected from the coilpack at a time, until I found the one that it didn't seem to matter if it was connected or not... cylinder #2. Later pulled that plug again, fine. Plug wire measure about 5K ohms on my meter, as its the shortest one. Sounds about right to me.
Today (its about 75 degrees) I bought a new coil pack and put it in. Ran beautifully. Warmed the car up, still ran nice. drove a few miles down to the freeway, ran great, got off at next exit. Proceed to run just perfect until I was slowing down for a light, then the miss came back.
Beyond checking the compression, what else might I try? I don't tolerate mechanics BTW, I do everything myself.
I have a 1993 dodge ram 15 passenger van. When it is cold, it runs fine, but after it warms up it starts to miss on the 6th cylinder. We have checked the plug and wires. Did not get anywhere. We replaced the injector. No dice.
View 8 RepliesMy 1993 Geo Prizm (with 275,000 miles on it) makes an awful high pitched screeching noise when I first start my car in the morning. The noise goes away once I am in second or third gear and is completely gone when my car is warmed up. It used to just happen in the winter and now it also happens during the summer. I had all my belts replaced maybe 6 years ago. Is this a problem of loose belts or bad power steering pump. Looking at the pump when I'm turning the wheel it seems as though the power steering pump belt stops turning. I also have crunching noises comes from, I think, my wheels when I turn sharply. What could this noise be? Time for a new car??!!!
View 11 RepliesI have 93 cutlass Cierra..6 cylinder..3.3.. when it's fully warmed up it stalls out on me as I'm accelerating from a stop. but then if I wait a minute and re start it it most times will run ok.. and is loosing power sometimes, when fully warmed up she gets bogged down in pressing the accelerator....it won't stall when Idling.. only when fully warmed up when Accelerating....the engine raced the other day as if someone was stepping on the gas when I wasn't.. Only did that once..hasn't did that since.. Service engine light is on..I have new Oxygen sensor, cleaned the maf sensor..new fuel pump and new fuel filter..new plugs and wires and air filter this past summer..
View 4 RepliesMy check engine light has been coming on at 60mph. It will go off at 58 or 65mph. I could drive those speeds on the freeway, but would rather repair the problem. I've replaced the O2 sensor after 180,000 miles. I did notice I have a 2 inch hole in my muffler.
View 3 RepliesI have a 1993 Geo Prizm (Toyota Corolla) that idles roughly and lopes only when the engine is fully warmed up to operating temp. I changed the plugs, and wires are only 1 year old and seem to be in good shape. I suspected a vacuum leak, but have not been able to find one.
View 4 RepliesI am doing an sas on my 93 f150 short bed. my issue is that I've made coil spacers out of 1/2" thick by 3" tall by 4" in dia.... as you can see strength is not an issue here. i bought 6" lift coils for a 93' then decided to just say f it and throw a d44 straight axle under it. the springs on a 78' d44 are the same dia. top to bottom. 93' springs get smaller at the bottom so i made this spacer for two reasons.... 1 to have smaller seat for the bottom of the coil.. and 2 so i could make up the spring length difference between the two springs. The spacers are leaning forward due to the 7 degree c bushings on the radius arms.
View 1 RepliesI have a 1993 F150 that I have been working on. I have a set of complete doors off of a 1989 with Power Windows and locks hung on the truck and need to figure out how to power them up. Looking for access to a wiring diagram that will identify the colors of the wires in the doors. I don't care about the auto down and all of that ... not going to try and convert the whole truck with comp and all ... just want to make these function.
View 14 RepliesI replaced the master cylinder 2 months ago and now every now and then the rear lock up for a second. its only happened a couple of times. Pulled the wheels and everything is in place with nominal wear with clean drums and rotors. Am at a loss as to why this is happening.
View 1 RepliesOK, this one has me stumped...I have a 93 F150, 302 with the E4OD. I know the transmission needs to be rebuilt (probably a bad pump). When I put it in reverse, the engine will start to bog down and will die unless I put it back into park or neutral.
If the engine does die, the fuel pump does not prime with the key "on" and the engine obviously will not start. If I let the truck sit for about an hour, the fuel pump primes like it should and the engine starts right up. The fuel pump shut-off does not trip and all fuses are good.
I have a 2000 F150 5.4L with 157k miles on it. I think it has the 4r70w trans. The transmission has started holding 2nd gear too long before shifting into third. Throttle position doesn't matter, it does it even under light throttle. I do not have a check engine light. I have owned the truck since new and the trans fluid has been changed 3 or 4 times. The fluid looks pretty good now, not burnt or anything. The truck has been sitting in the garage a lot over the past 2 years, I drive it at least once a month and have put maybe 2000 miles on it this year. It shifts fine through the other gears, just 2-3 has an issue. Truck has the towing package.
View 6 RepliesMy car will start up and go into reverse no problem. However, once the car is warmed up (which I think it warms up a little quickly) it won't go into reverse. The problem has been getting worse for a year or two, but always works fine when the motor/transmission is cold. Also, going down the highway, it runs great and the engine never gets too hot. Is it just a transmission going out, or is it a cooling issue?
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