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I have a 2005 F-150 XL V-6 with an automatic 4R70E transmission. Just the other day without warning, I lost reverse. It drives forward without issue and still shifts smoothly. The transmission fluid is clean. After sitting for about 10 minutes in reverse hoping it would catch, a light finally came on. I plugged it in and it said it was the transmission output shaft speed sensor. I replaced that part. No change. After a little while longer the light returned and threw the same code. I have multiple mechanics telling me different things, "it's the band" or "it's the torque converter" and so on. The kicker is, you can still hear the torque locking with the drive shaft, but it still won't go anywhere. HELP! I don't want to spend a fortune on a new transmission!

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  • 56 Answers

Reverse lockout solenoid?

Posted on May 10, 2014

  • Justin Fincher May 11, 2014

    Would this turn on the trans fault light? I'll definitely check it out!

  • Paul Smith
    Paul Smith May 11, 2014

    I'm not sure. I just remembered the safety circuit that prevents shifting into reverse when going faster than 5-10 mph. Maybe it "thinks" it's moving forward.

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Posted on Jan 02, 2017

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redlinetech0
  • 33 Answers

SOURCE: 02 Saturn SL1

Replacing plugs and wires is the correct soultion for a p0341 on an S-car. However the trans shifting hard is another common problem that the s-cars have which is your valve body on your transmission and the Input shaft nut will eventually need to be replaced as the problem will get worse. as far as the Ignition module. It is actually called an Ignition Control Module. Maybe they were saying controller and referring to that. I hope this helps.

Posted on May 18, 2009

  • 44 Answers

SOURCE: Have a 2004 range rover with p122b code output speed sensor

This might sound odd, but it could be the gearbox output shaft bearing. If the transmission sounds noisier than it did, this could be the issue. Only way to check is to take off the transfer box. Not a major job, but takes a while. Some good fault code readers will read transmission codes, and allow you to see in real time what the sensor is doing - if the sensor suddenly loses signal, then it is very likely to be the a bearing (output shaft bearing most likely) that is at fault, causing the sensor ring to move too far from the sensor. Best guess, but could be other things, so don't go taking that transfer box off without getting a road test with a good fault code reader on it - or find someone with a portable oscilloscope and put that across the sensor - you should be able to see nice square wave pulses - if they get bigger and smaller (variable amplitude), that's your problem. If not, the fault lies elsewhere.

Posted on Aug 03, 2009

Murphybanton
  • 2004 Answers

SOURCE: 1991 735i automatic transmission,no forward drive, has reverse

The transmission has gone bad and all I can say is that you need to replace it.

Good luck.

Posted on Aug 29, 2009

dnewcombe1
  • 1564 Answers

SOURCE: 1998 Jeep Cherokee Limited 5.2 - Won't shift into drive

Check your transmission control relay, this would appear to be the fault in your system.

Posted on Oct 04, 2009

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  • 4 Answers

SOURCE: 1997 transmission Slow Acceleration

not sure if this is the answer yet but i have the same problem with the same codes i work at an auto parts store and a few of the techs that are customers have lead me in the direction of changing the ignition switch, i am doing it today will let you know if it solves the problem

Posted on Jan 27, 2010

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Neither type are that complex but the both take some serious specialty tools to rebuild/repair.

My early poverty days forced me into working on the... and I have NEVER been sorry.

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The question is a little vague but I think I know what your referring to. All modern automatic transmissions have torque converters. This is the device that connects the engine to the transmission. All vehicle manufacturers like the trans to be nice and smooth shifting. That's great but it does come with some minor drawbacks. If you are facing slightly down hill and you put your car in reverse but do not step on the gas slightly I can guarantee that you will indeed roll forward. You can eliminate that issue by holding your left foot on the brake while you shift into reverse. Then, as soon as you feel the trans engage, gently depress the gas pedal with your right foot and it will eliminate that forward roll problem.

Sep 25, 2014 | Cars & Trucks

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The reverse bands can break without leaving a burning smell. The instant you put it in reverse, there is a sudden torque as the slack comes out of the drive train, so when it comes tight it can break without slipping or any other warning.

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Was pushing snow and heard aloud ping while in reverse and it quit pulling.all forward gears still work. sounded like a u-joint. believe me i no that sound.i drive it like i stoled it. lol.but thats what...


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The transmission has gone bad and all I can say is that you need to replace it.

Good luck.

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