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Loafer

Transit Connect 2012 Transmission Issue (or not?)

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While driving on the highway at 65mph and wanting to pass, I accellerate, then the tranni slams into gear making a loud noise. I took it to a transmission repair service and when they checked it no codes appeared.  Is this normal for a 4 speed transit connect?  Have others experienced the same issue?  Is there a Ford fix?  Thanks in advance. 

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Additional info:  120,000 miles, motor mounts just replaced, transmission fluid just changed, The problem persists despite this.  Other posters have also cited this problem with their transit connects.  This seems to be a common issue and I'm wondering if it's normal?  If not, is there a fix?  Hey Ford, are you out there?

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What is the engine speed before and after  this happens?

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Could be, if the engine speed  is great enough it could be shifting down two gears and this would make a big noise and jolt.

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33 minutes ago, G B L said:

Could be, if the engine speed  is great enough it could be shifting down two gears and this would make a big noise and jolt.

Are you talking MPH or RPM's? 

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RPM,   If you use the transmission in the manual mode you can see the rpm change for the gear changes .  then you would see if your downshift  was causing a two gear change.

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Sometimes it's mechanical.  Transmission may need a rebuild.  Internal parts wear after so many miles.  

 

In some cars, there's an update or reflash for the transmission control module.  In some cases, you can clear the adaptive learning strategy, and the TCU will relearn the shift firmness.

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Posted (edited)

On the same transmission, Mazda uses an Idemitsu fluid with greater viscosity.  But I don't think that filling with Idemitsu Type-M fluid is the solution.  

 

You mention that transmission fluid was changed.  Was it a complete fluid exchange?  Or was it just a drain & fill?  Was Mercon LV used?  I believe that on your model year, Mercon LV is the specified fluid.  In earlier models, some of those transmissions were factory filled with Mercon V.  If a shop did the work, they may have filled your transmission with some sort of Dex/Merc compatible fluid, which is not suitable for Mercon V or Mercon LV.  And I have seen where shops make mistakes with filling to proper level.  You may have issues if the transmission was only drained & filled, with the wrong fluid, and the transmission fluid level is not correct.

Edited by Fifty150

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On 7/5/2019 at 8:32 AM, G B L said:

RPM,   If you use the transmission in the manual mode you can see the rpm change for the gear changes .  then you would see if your downshift  was causing a two gear change.

4000 + RPM

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On 7/4/2019 at 2:05 PM, Double Nickels said:

This is just a hard downshift?

Yes I believe you are right.  When going up a hill this often happens.

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On 7/5/2019 at 2:56 PM, Double Nickels said:

Sometimes it's mechanical.  Transmission may need a rebuild.  Internal parts wear after so many miles.  

 

In some cars, there's an update or reflash for the transmission control module.  In some cases, you can clear the adaptive learning strategy, and the TCU will relearn the shift firmness.

Interesting and worth a try. 

 

On 7/5/2019 at 2:58 PM, Double Nickels said:

 

 

This video is very helpful.  Thanks

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On 7/6/2019 at 1:42 AM, Fifty150 said:

On the same transmission, Mazda uses an Idemitsu fluid with greater viscosity.  But I don't think that filling with Idemitsu Type-M fluid is the solution.  

 

You mention that transmission fluid was changed.  Was it a complete fluid exchange?  Or was it just a drain & fill?  Was Mercon LV used?  I believe that on your model year, Mercon LV is the specified fluid.  In earlier models, some of those transmissions were factory filled with Mercon V.  If a shop did the work, they may have filled your transmission with some sort of Dex/Merc compatible fluid, which is not suitable for Mercon V or Mercon LV.  And I have seen where shops make mistakes with filling to proper level.  You may have issues if the transmission was only drained & filled, with the wrong fluid, and the transmission fluid level is not correct.

I don't know.  I will check to be sure that Mercon LV was used and the fluid level is proper.  It was changed about a month ago at a Ford Dealer, so It should be correct, but I will check.  A trusted transmission shop recently drove it and then checked for codes and found nothing. 

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I would clear the adaptive strategy, and allow the transmission to relearn.

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20 hours ago, Fifty150 said:

I would clear the adaptive strategy, and allow the transmission to relearn.

 

Yes, I believe that would be a good idea and will do so.

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