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Transmission - Hard Shifting 2004 Venture

DanOttawa's Avatar
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Join Date: Oct 2010
Posts: 3

October 10th, 2010, 9:44 AM   #1  
Transmission - Hard Shifting 2004 Venture

My 2004 Venture transmission starts to shift hard after driving about 8 miles(14km). I noticed if I shut the engine off and then restart it immediately the hardshifting stops. The transmission/engine does not really have a chance to cool down. This tells me that it may have something to do with the computer. Its almost like it is resetting itself after I shut down and restart.
Anybody have any clue??

Dan in Canada

Bogushavis's Avatar
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Join Date: Oct 2010
Posts: 6
Brigham City, UT

October 25th, 2010, 11:03 PM   #2  
Venture Hard Shift

When you shut off the engine, pull the key and get out of the van, the computer resets the drive cycle. When you start the van and start moving again the computer checks the length of time it takes for the trans to complete a shift. If it's longer than 65 milliseconds, it increases the pressure. It will do this 5 times (so I've been told) before it gives up and changes the pressure to maximum. This makes the pump whine and the shifts jarring. The computer will store the code P1811 each time this occurs.

I know you already found the thread that explains this, but I'll put a link to it for anyone else who might be having this problem.

nhautotech's Avatar
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Join Date: Oct 2010
Posts: 5

October 26th, 2010, 12:24 PM   #3  
hard shift solution

The problem with the transmissions in these vans that cause them to hard shift is the pressure regulating solenoid. It cloggs up and causes this symptom usually between 60-100k miles. I was lucky and was able to do a transmission service and flush on mine and it removed the build up and has been shifting fine now for months. You may have the same luck. If not the solenoid will need to be replaced which is a fairly involved job involving the removal of the cover on the drivers side of the transmission. If changing the filter and flushing it doesn't get rid of it you may want to try an additive before giving up on the easy way. good luck!

DeanS1's Avatar
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Join Date: Jul 2014
Posts: 2

July 11th, 2014, 3:28 PM   #4  
Venture Van, Montana Van shifting hard.

Hello everyone. I have owned 8 of these vans over different years and I have found a solution to the hard shifting that does not require an expensive fix.
The pressure control module is the problem but it is getting a signal from a dirty Mass air flow sensor.

Now all you have to do is buy a spray can of mass air flow control cleaner and take out your MAF sensor and spray clean this really well and put it back in and it will no longer send your computer a signal saying something is wrong and screw with your pressure control module.

It is a special cleaner that leaves no residue on the MAF sensor readily available at Canadian tire or parts store.

I know this might be hard to believe but believe an experienced Venture owner. Been there done that.

The MAF is in the tube from your air cleaner to the intake.

Hope you have success.

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