1995 1.9L LX AT : 3rd gear only, no 4th/OD - Solved

Discussion in 'Drivetrains' started by kbarb, Aug 15, 2011.

  1. kbarb

    kbarb FEOA Member

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    I don't know if junk yards ever do mail order - it's worth a try. Here's the one I used - they were pretty friendly although it is of course, PicknPull.
    http://www.picknpull.com/locations.aspx?View=Detail&ID=61
    They post their inventory too.
    They had at least ten there. I'd think of pulling it for you but it's a two hour drive from where I live.
    I know . . . call them up, beg for mercy, or you know, tell them you're going to jump off a bridge if they don't help you out, then ask them to ask one of their regulars to pull it for you for a fee, then you send the puller a SASE package. Sometimes you have to be clever. ;-)

    Maybe Ebay ?
  2. zzyzzx

    zzyzzx FEOA Member

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    I have to check the switch first, but everything you said about the symptoms are a 100% match.
  3. zzyzzx

    zzyzzx FEOA Member

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    OK, I finally checked for codes, so it looks like my problem might be something different since I am getting code 621:

    Code 621- Shift solenoid 1 circuit failure

    Loosk like I need to do this:

    TC20 KEY ON ENGINE OFF DIAGNOSTIC TROUBLE CODES (DTCS) 621/622/641/643: CHECK SOLENOID RESISTANCE

    Key On Engine Off DTCs 621 (SS1), 622 (SS2), 641 (SS3) and 643 (TCC) indicate a failure in the respective shift solenoid circuit.

    Possible causes:

    -- Open harness.

    -- Shorted harness (ground or power).

    -- Damaged shift solenoid.

    -- Damaged PCM.

    l Key off.

    l Disconnect transmission connector (12 pin at transmission).

    l Measure resistance between suspect shift solenoid circuit at transmission connector and chassis ground.

    l If the resistance between 13 and 27 ohms?

    Yes
    GO to «TC21».

    No
    GO to «TC25».

    If it matters, I have a TX style for the gear ratio.
  4. zzyzzx

    zzyzzx FEOA Member

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    Finally ran the TC21 test above and got an open circuit at for solenoid 1 (measuring through the transmission to ground).

    :(
  5. Pepsigerry

    Pepsigerry FEOA Member

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    1993 not shifting

    Hi, maybe you guys can help me. I have a 1993 Escort LX, bought new in Nov 1992, time sure went by fast! Anyway, I'm having the same problem as kbarb. Car has 94,000 easy miles, no trans fluid change ever, I know guys! I checked the electrical connections on the tranny, took the range switch out and it seemed fine, nice clicking. Car didn't throw any CEL, would it? Anyway to get a copy of the Powertrain Control/Emissions Diagnosis Manual? Can anyone post relevant pages? Any help, suggestions would be greatly appreciated. Thanks, Gerry
  6. zzyzzx

    zzyzzx FEOA Member

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    You need to check for codes. I have a code but no light. Search EEC-IV and it's easy enough to find the instructions on how to check for codes. It takes some practice and it helps if you can do it in a garage or one of those cardboard things blocking windshield light, or when it's not very bright outside.
  7. Pepsigerry

    Pepsigerry FEOA Member

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    I'll check for codes. Thanks, Gerry
  8. Pepsigerry

    Pepsigerry FEOA Member

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    I warmed up the car, then checked it 3 times. It was 111 p 111 p 1 p 111 p 111. All systems OK? I did disconnect the battery but also drove it afterward for about 5 minutes. What do you guys think? Gerry
  9. zzyzzx

    zzyzzx FEOA Member

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    Then I would check the transmission range switch and the resistance in the solenoids as per the factory service manual. Then drive it some more and check for codes again.

    There is more than one EEC-IV test, I assumed that you did the one with the engine off?
  10. zzyzzx

    zzyzzx FEOA Member

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    Just found these instructions here on how to fix a similiar problem (except that they had 641 code, which is s different solenoid):

    http://www.justanswer.com/ford/1aj5y-19 ... t-son.html

    Most of the instructions are pretty much straight out of the factory service manual. After reading it I noted the part about putting the car in R to reinstall valve body, but there are no instructions on what gear it should be in for the removal (except someone in another forum said something about having to flip or rotate a bar).

    Now that I am finding good pictures of the actual part, I can see why they only sell the ones I want in pairs:

    [​IMG]
  11. ashocky

    ashocky New Member

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    OK, I had the same prob with mine... before you go through all the electrical testing and what not, check to make sure the vacuum lines are not broken... that was the problem with mine... the line went to some silver cylinder that has a two wire plug on it thats just to the left of the airbox, a piece of duct tape fixed it!!! just a temp repair but it worked!!! I hope thats all thats wrong with yous too...
    Last edited: Dec 1, 2013
  12. denisond3

    denisond3 Moderator Staff Member

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    Your symptoms are also typical of the trans running in the "limp" mode, caused when the computer cant tell what gear you want it to be in - because its not getting the indication from what is called both the 'neutral safety switch', and the 'transmission range sensor'. Its one part, and is the same switch that prevents the starter from working unless the trans is in park or neutral, and that turns on your backup lights - though the range sensor functions are probably independent of the former jobs.
    This 'switch' is located on the outside of the trans case, where the shifting control shaft goes down inside. Its what is rotated when you move the shift lever. This part has failed before, or one of the connectors or a wire was bad. The poster put up a picture of the opened up switch 0 with obviously burnt contacts. Its an expensive part - over $200, although you may find one in a junkyard that works. And it doesnt look like there is any way to open it up and close it back again.
    Without the signal from the 'transmission range sensor' you can put the transmission into first and reverse, because those are handled by the transmission hydraulics, not using any solenoid or electrical signal. When the car is moving and there is no signal from the range sensor, the hydraulics in the trans will default to it being in 3rd when you move the lever out of first. This allows you to start out on level ground, and to get up to 60 or 70 - with more noise from the engine spinning faster, and to start out on level ground.
    Sorry to say I dont know a good way to check for a failed range sensor - though the codes may do that - other than swapping in a known good one. It has two fairly complicated connectors between it and the wiring harness on the car - and it would be a slow-study to figure out which contacts were the ones for being in 'D' or 'OD'. The connectors are hidden beneath the air filter housing.
    If you do a search using the terms 'transmission range' in the 2nd gen Escort forum and the Drivetrains forum you should find the previous discussion of the symptoms just like yours.

    I hope you will fill us in on what it turns out to be.
  13. Pepsigerry

    Pepsigerry FEOA Member

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    Just to let everyone know I had a very small broken ground wire coming from the right side trunk hinge. I reconnected it and the transmission shifts fine again. UBELIEVABLE! So after checking the range switch to the neutral safety switch and many things in between it was a little tiny broken ground wire! I still love my Scort though!
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  14. bent_rod

    bent_rod FEOA Donator

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    You need to fix more ground problems. Don't stop now. I would do a complete cleaning of all ground wires and the attachment points on the car. Starting with the ones up in the engine bay.
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  15. Pepsigerry

    Pepsigerry FEOA Member

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    Thanks bent_rod, I had done that on my quest to fix my tranny problem. There are ALOT of grounds on these cars and very good advice to clean them all, Gerry
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  16. zzyzzx

    zzyzzx FEOA Member

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    I could check it with my Fluke 77 set on ohms.
  17. MrSentry

    MrSentry New Member

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    where are the photos?
  18. kbarb

    kbarb FEOA Member

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    Sorry, I'll try and fix it over the weekend.
    Dropbox changed their public facing folders to non-public a few days ago, so I have to host the photos somewhere else. That and all the other photos I've posted on FEOA.
    Bug me if I forget - I don't mind, but kinda busy out here.
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  19. MrSentry

    MrSentry New Member

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