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Need Help Problems are Back

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kingbrentdwyer

New member
So I was having problems with my tranny shifting funny but it seemed to "go away" so I let it ride. It has been cold and snowy here in lovely northern Illinois and my lovely lady was looking nasty and packed with snow but still shifting fine. I went and had a "super extreme" car wash done got her looking nice and shiny then driving hard it started shifting hard into 1st 2nd and 3rd (that's all I went through with speed limit). So now I don't know what the problem is. when it was acting up last time I took it to the tranny shop they drove it said it was fine checked the fluid said it was still pink and wasn't burnt. I am a little short on the savings end right now due to replacing the motor a couple months ago so I am hoping you guys could give me some input and hopefully help me save some cash thanks guys
 


What year/model/make is your car? It sounds like you have a very common problem and likely have a code P1811 stored in the pcm history which is for max adapt shift. The pcm will monitor how long each shift takes to complete and if it is slipping excessively more than it wants to see and compensate for the code will set, but it will not turn on the check engine light so you wont know unless you scan the car. The hard shifting will go away with a key cycle until the problem is present again. When this code sets at that moment it will dissable adaptive shift pressure and go to max line pressure as a failsafe and cause your hard shifts. Likely since the weather has been bad you havent been driving the car too hard so the trans hasnt been under enough load to cause the excessive slippage and that is why it didnt start shifting hard as the code wasnt setting. There is more information about this on my info page in the link in my sig.
 
It is a 1997 GTP is this code something that will show up with a cheapo autozone scan or do i need to take it somewhere and pay to have it scanned
 
Trannyman you were right when I started my car back up it was shifting fine I am going to get it scanned but what needs to be fixed exactly
 
It is a pretty big job to replace the pressure control solenoid as you have to drop the trans down and remove the side cover from the trans to gain access to the valve body and solenoids. Most shops honestly try to avoid just replacing the solenoid as it is not a 100% guaranteed fix and often try to sell a full rebuild.
 


how long can I drive with it like this? I don't drive alot during the week maybe 5-10 miles a day. Not a whole lot on the weekends either. I will just save enough to either get it rebuilt or find a rebuilt one if you think that might be the cheaper answer
 
As long as the trans works fine other than the harsh shifts when it warms up it should be ok for a while. I have had a lot of people tell me they have driven a few years with this problem going on and not got any worse, but I have also had people tell me that a few weeks later the trans died on them so there is no spot-on answer but the majority seems to drive quite a while like these and is more of an annoyance than anything else. The harsh shifting is a failsafe to prevent the trans from burning up.
 
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