Anyone ever had issues with with putting truck into reverse and it not actually shifting? It's happened twice to me in the last month. 2 years with no issues. Actually the first time it happened to my wife I figured she just didn't get it into gear. But today after driving around for about a half an hour I was backing into a parking spot and it did not go into reverse till I revved it and put my hand on the shifter at the same time so I'm not sure if it was the rev or the touching of the shifter that made it go into gear. There is no slop in the shifter. So mechanically it should be ok but is there an electrical sensor on the column that tells it to go in reverse maybe that's dirty? Here's a little more info. The truck is a 2012. It had 65k on it when I bought it. Tranny fluid looked and smelled good at time. Just hit 90k and did tranny filter and pan dump about a month ago but I can't remember if it was before or after my wife had the issue with it. Not sure if tranny service had ever been done before I owned it. Of the 25k I have put on it about 6k has been towing my 5th wheel at about 10k lbs. Truck is not lifted. Sitting on 35x12.50s. Deleted dpf with h&s mini max about 4 months ago at 85k. Drove around on h&s tranny tune for about 2 days for 200 miles but hated the hard shifts. Went back to stock tranny tune at that time. Truck has shifted harder than before ever since then but compared to tune settings its allot better. 99.9percent of the time it's on the stock setting and I don't push the truck very hard. It has been in the tow tune once for about 40 miles while towing. It has been in the street setting maybe 4 times for a grand total of about 2 miles and on the performance setting maybe 3 times for maybe a total of a mile. Is there anything you all can thing of that I should look for? Worn out bushing on linkage? Sensor? Loose bolts? It has been put back into reverse probably 25 times since it screwed up earlier today with no issue and probably several hundred times since it screwed up for my wife. Also when I replaced the filter I was not sure of the torque spec for the screws that hold it in I just know that it's not allot so I didn't tighten them up very much just snugged them, one of them goes right through the valve body right in the middle of the shift solenoids. I would think if that was the issue then it would be happening much more often or all the time. I believe that the back up camera is powered from the same circuit as the reverse lights, I maybe wrong idk and I'm not sure where the power for that comes from I'm guessing it would be from somewhere on the column. But does anyone know what powers the reverse solenoid or how many are used in reverse or if it's even one of the ones by the screw that holds the filter in?

 

 

Take it back to the dealer. sounds like a lose wire. There is no longer a mechanical connection to the transmission.

 

There is a shift cable

 

There is still a mechanical link to the trans. You have the shift cable to select the gears and park (PRNDML).

 

Exactly. There doesn't seem to be any slop in it. Trying to get some information on the electrical side of it

 

How long did you wait before blipping the throttle? This issue has plagued my 2011 for a long time and it's random. It may go many months without ever having the shift to R issue and then it might have the issue twice in a week. I back into my driveway the same way so it's not like it occurs with a certain type of surface because in this example, it is usually fine but sometimes has the issue. I don't think I've ever had this issue when cold but I haven't tracked that info too closely. Touching the throttle does resolve it or by the time I decide to do that mostly out of aggravation it's already about to shift anyways. The longest I have waited when I could and recognized the issue was five seconds which feels like an eternity when you were expecting to shift to R. If I release the brake, it'll roll forward as if it's in N but the column shifter is not and R is illuminated.

I don't think I've had the issue in some time but I now shift to N when I think about it, coast to a stop and it goes into reverse quickly every time with that process. I've only almost screwed that up once because sometimes I have a short term memory event (if you forget you shifted to N while still coasting, you can see where that would go...). The times it has delayed were coming to a stop, D/M to R and wait for the shift. If I try to reproduce it after it has this "shift event" it'll shift through all positions without issue and with prompt response. Shutdown, start and re-test also without issue.

The 6R140 is a strong transmission and I would buy another, I just think the 2011 job 1 has glitches that Ford decided they will never fix. An aftermarket TCM tune did fix my 2nd gear stumble issue for example but it did not fix this shift to R issue (or make it worse). At this point, I just have to accept that I pre-ordered a first gen re-engineered truck but I wasn't going to buy a 6.4L so I took the risk.

 

The time it happened to my wife it was a good 25-30 seconds and for me it was just a few seconds. As soon as I took my foot off the brake and the truck didn't move I looked down and saw that it was in reverse I immediately reved it and put my hand on the shifter at the same time.

 

That seems odd with all the electronics in these transmissions that a servo wouldn't be doing the shifting. Thanks for the information I stand corrected.
I guess it would be wise if this happens again to stop and have it towed to the shop. Intermittent problems are hard to fix. If you take it to the dealer and it is working fine than they can't fix the problem because they cant find it. Go and talk to there transmission guy and see if he has seen thisbefore. Thats your best bet.

 

I remember when I helped my mechanic friend remove and replace the E4OD on my 1996 truck. There was a plastic box on the left side of the trans where the shift cable connected to. It had a electrical plug on it which sent the electrical signal to the inside of the E4OD to tell the electronics which gear to use. Here is a link:

https://www.ebay.com/itm/4R100-E4OD-...-/350988047294


This is it mounted on the trans outside, obviously...I am Capt. Obvious.

Early E4OD Range Sensors are Prone to Failure

E4OD transmissions manufactured prior to 1995 had an issue with the MLPS, or “Range Sensor”. It was determined to be inadequately weather-proof, allowing water to enter the connector and corrode the pins, causing electrical problems. It is always recommended that this sensor be replaced with an updated 1995 or newer style, if it has not been already. From here:

https://www.usshift.com/e4od.shtml






Here is a link for MLPS for the the next gen trans after the 4R100, the 5R110. It's called a range sensor on that last listed site.

https://transmissioncenter.net/shop/...etent-2003-up/

Now, you can see the problems with that one would be corrosion, especially in the rust belt like where I'm at.



It appears they went internal with the new 6R140 trans. Here's some pics:







Here's a link for the 6R140 Range sensor:

https://www.buffaloengine.com/catalo...0-range-sensor

It looks a lot like the external 5R110 range sensor but they put it inside to keep it lubed inside the trans fluid I'm guessing. So you and Kper may have intermittent issues with it.

 

That would make sense then. Must be something in that controller that is causing the problem.

 

That might be the place to start looking. Don't know for sure... If it was the solenoid that controls the reverse gear, I guess it would do it more often than just what was described here. I don't know. I'm just a dude who ponders things and knows how to phrase things on Bing to find the stuff on the internet. Just trying to help...

 

I posted your first and second posts in another forum and asked the trans guy about your predicament. His response to my initial question about the range sensor was this:

No, I’ve never seen a problem with the range sensor, i don’t even change them on an overhaul. It’s one of those things I’ve never seen go bad even with HUGE hours and miles. If it’s a problem with reverse only it could be a problem with the direct clutch solenoid, the direct clutch, the low reverse solenoid, or the low/reverse clutch. There are reverse piston updates doethe earlier trucks. Is there any codes or is the tow/haul light flashing?

EDIT He responded:

If the “R” was lit up when it didn’t move then the linkaged moved enough to put it in reverse. There is nothing on the column other than the Interlock solenoid but that has nothing to do with reverse. I would tel him to check the shifter cable bushings and make sure the linkage is secure to the manual lever on the side of the trans. If it didn’t go into reverse and the TCM commanded it and didn’t see the shift complete, it SHOULD throw a code. The filter should be 89 inch lbs I will check when I get back to work to be sure.

What year is the truck? And is the truck tuned? If it’s an early 2011 they had some solenoid issues other wise the failure is rare.

I then posted your comments to see what he comes up with.

Check it out here:

https://www.bobistheoilguy.com/forum...0-transmission