Ford F-150 (2004-2008) :: Code P0731 - Improper Ratio For First Gear
Dec 16, 2008
I have a 06 f150 and about a month ago I purchased an edge evolution. Twice in the past 3 weeks my o/d light starts flashing and my truck beeps and it shows Trans Fault on the trucks display. When I use the edge to check the DTC it comes back as P0731. I am running the canned level 3 tune no changes and trucks completely stock other then the edge. Also both times I have been going about 10 mph down a hill without giving it any gas. Also both times of shut the truck off and let it sit for a bit to make sure I wasn't going to break something.
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Looking at an '05 F-150 XL this afternoon with a 5.4 and factory tow package. Is there a way to ascertain the gear ratio and the presence of a T-Lok diff without crawling under the truck? Vehicle has 100,000 miles. Anything I should check out in particular?
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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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So I got around and decided to fix my transmission my self. Any way I got the code PO734 from my CE light which is gear 4 incorrect ratio. So some people say its the solenoids that cause this issue, some say its the 4th gear clutch...
So, Is it the solenoid or it could be the clutch itself? Ive removed the 4th gear from my transmission today and it looks intact. No weird damage or physical like damage on it... I just don't know which to do since solenoid job i can do myself which will be about 5 hours minimum....
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Have a 2003 F350 srw 4x4, 107,000 miles on it. Driving it last night tow/haul light started flashing, hooked up AE got a P0730 Incorrect gear ratio. Truck seem to do ok, cut it off went back out a little while later and the tow/haul didn't flash.... Only issues I've had is when shifting from P to R, it takes a second or two longer than it should and shifts hard when it does but it doesn't do it every time.
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Just picked up a 2002 golf 2.0 auto for $200. Get the car home start it up and it runs great but... transmission shifts all kinds of funky. Starts in first then shifts to third. If I give it some gas it shifts down to second but has nothing there, just revs. Will not go into 4th at all. Throw my little mac scanner on it some codes come up. Only one that mattered was p0277 if I remember. Do a little search and it comes up as the g68 under the tranny mount. Change that out and had not cel. Still shifting the same but no code at all. Throw my scanner on just to see and get p0730 incorrect gear ratio.
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Bought a Mk4 1.8T gti last year had only about 75,000 on it and drove it for about 10,000 miles. The check engine light went on about 2 months ago and the code read 3rd gear incorrect ratio. It still rode fine until about a week ago when it started slipping. Brought it to the local transmission guys in my town and got a quote at about $3,000-$3,500 to have the transmission rebuilt. The transmission is a tiptronic automatic 6-speed.
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Having trans problem & got code P1790 with P0731. I believe I have to replace the output & input speed sensor. Anything else I may have missed here?
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My wifes 1998 Intrepids' Check Engine Light came on yesterday, and while she was turning into the driveway the car stalled. It would fire right up again, and drive normally, but when she went to pull into the driveway again it stalled.
I took it into the shop, and they read the computer and thats when the P0731 code showed up.
P0731 Incorrect gear ratio # 1
When I went to bring it home, I then noticed that the speedometer was not working, and the tranny wasn't shifting out of 1st gear. The tranny fluid is clean and not burnt.
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After car warms and while driving trans moves to 3rd gear and stays ??
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I got burned with a smoker back in the mid 1980's and have been hesitant to come back. I am currently pulling my 5er and my enclosed gooseneck with a 6.2 gasser SRW. It has the 3.73 gears in it...not the best for towing.
I am thinking about ordering a new SD DRW 2wd with the 6.7 PSD.
Both my trailers are rated at 18000 GVW, what would be the best ratio to order? 3.73's?? 3.55? Fuel mileage will be what it will be with what ever ratio I go with. The truck will be mainly a puller. Not a daily driver.
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I just purchased a used 2010 fx2 screw with 5.4 and 6-speed auto. How can I find out what rear gear ratio the truck has? do I have to contact a dealer to find this out or are their any web based sites that can decode the vin? Is the gear ratio marked on the truck anywhere?
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Never been on a forum but I've got a 1977 ford f150 with a 400,c6 trans currently with 3.50 gears and 26.5 overall dia tires. if I was to put 34.5 inch tires and 4.56s would it drive like it does now, same speeds and rpms in all three gears and it shouldn't chug more gas than it already does... right?
If im reasking a question post link haven't found one.
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I have a 2013 F450 Platinum and I love it. I would really like to get my gear ratio closer to 3.73 for fuel economy. Have not been able to find replacement ring and pinions to go to 3.73, so my only other option is to do it through changing tire size. I have 4.30 gears and based on what I have found, 37 inch tires will get me really close to the 3.73 ratio. I want to keep my truck as close to factory as possible, but I do want to do a leveling kit.
So can I fit 35x12.50x17 Toyo MT under my truck with just a leveling kit and use the stock rims? If not, what are my other options?
I have seen the option to swap to 22" shaved Alcoa's, but don't really want to go through all of the spacer/adapter stuff.
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I have a 99 f250 with some procomp (325s) that are 12.5 wide with a 6in lift my superchip tuner can change the trannys shift points but I am pretty sure a new gear ratio is needed. I dont do a whole lot of off roading with it its mainly my driving around and highway rig whats a good gear ratio that would work for me
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What the gear ratio is from factory?
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I had the transmission rebuilt a year and a half ago, when I took it in it came up 4th gear incorrect ratio. The guy who rebuilt it said it wasn't the original tranny that came with the car because it was modified to fit in the car. When I got it back, after a couple hundred miles or so, the check engine light would come on for a day or two then go off. When the check engine was on it would get stuck in 3rd gear, once the light went off all was well until the next time. I took it back to the guy who rebuilt it since it was still under warranty. the P1529 code came up for TCM issue. He put some sensors and a chip in and thought it fixed it, no such luck. Finally I had the cash and had it looked at by another shop and the 4th gear incorrect ratio came up as well as the P1529 TCM code. He's suggestion to fix it was to either get a used tranny or rebuild this one again. He believes since it isn't the original tranny that the tranny in there now was for a SOHC engine, not a DOHC engine and that's why the ratio in 4th gear is off and it throws the TCM code.
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My truck is a 2008 F250 6.4 Powerstroke 4x4 King Ranch, CrewCab, Shortbed.
I don't know which rear axle ratio it has - maybe someone can help me. the tires mounted are 275/60R17 and in fifth gear (TC locked) the engine has 2000rpm @ 70mph. I think it is a bit to much so I want to install a kit with and lower ratio. I pull trailers just sometimes and here in germany these only have 3,5tons max weight. So I think I don't need this power at 70mph. 1750rpm would be enough. How do I have to modify the front axle ratio if I get a lower-ratio-rear-axle?
I want to lower the fuel consumption. After some modifications, the truck needs round about 12-13L/100km (18-20mpg) and I think it is possible to lower this as bit.
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Last night while driving, my transmission made a pretty severe clunk, but then appeared to act normal. However, a check engine light came on so I pulled over immediately as I was literally at the entrance to a gas station.
I looked under the vehicle, under the hood, saw nothing leaking, nothing obviously broken etc. So got back in and started the engine, went to shift into reverse and the transmission clunks, same going from N into D.
I limped it home, but while driving noticed that it was not shifting but stuck in one gear.
This morning I scanned for codes and the only one showing is P0770 Shift Solenoid. I searched this forum though and get 0 results on that code, searching Google is also surprisingly vague. I believe (could be wrong though) that I have the 6R60 Transmission, it is a 2008 Explorer with the 4.6L V8.
Where to check first? When I get time I am going to check the fluid level, but could not last night as there is no dipstick!
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I have a 3 spee Od out of a 1985 F-150 2wd . I was wanting to put it behind a Onan 6AT diesel . The engine came out of a P-350 bread truck . I runs great . I was wanting to know what the gear ratios are on the transmission . The engine has about 135 ftlbs of torque . The tranny was behind a 300 6 cyl . Iam trying to find out if this tranny will work or will I have to go to a N<!-- -->WC or TKO 5 speed .
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After my 2005 Nissan Sentra check engine light came on I had the codes read. The code is indicating that there is a lean air/fuel ratio mixture. I'm thinking this may be a false positive(bad sensor), clogged fuel injector, etc. The light has gone off and come back on. I live in Utah where the cold weather may play a factor. How to diagnose the real problem, or where I should start?
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