Question about 2003 Pontiac Montana

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Transmission seems to shift into gear but will not go

We started having trouble thought was filter and oil changed and got better now it will not go you can here it shift into gear fine but will not go acts like it is trying smelled like a wire burning

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  • soaplady743 Mar 14, 2009

    thanks very much for your help i really appreciate it we will find out monday as we are taking it to a transmission place to have it analyzed..appreciate the feedback

    thanks

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  • 11 Answers

You did more harm than good by changing the filter and fluid. Did you have the system flushed or just drained? If you drained it then you might have gotten some larger particles of dirt caught in a valve body component and thats probably why it wont shift...

Posted on Mar 14, 2009

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I have a 1981 ford f150 4x4 with a 302 engine An automatic transmission that works fine shifts properly going forward But when I put it in reverse I hear a clunk and sometimes it goes into gear and...


If the transmission was rebuilt 2 years ago the fluid and filter did not need to be changed. In a 1981 there are no trouble codes to retrieve so whoever suggested that is out to lunch, Unfortunatley you need to get the transmission rebuilt again, hopefully it gets done better this time. Using the dexron oil in Ford transmissions is something transmission shops do because they don't want to stock different fluids. While it's not likely that using dexron oil lead to the failure it would be better to use mercon or type F oil.

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The first thing I would want to know is where the fluid is going.
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another possibility is the filter....

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Ok I have no Idea who told you not to change the fluid? However there is a reason you have to drop the pan to drain it, or change filter and the reason for this is. So you cant just change fuild and leave dirty filter in, or change filter and leave dirty oil in. Your wouldnt just change one or another on your motor would you? lol Anywho your problem is either burnt fuild. Yes the fuild can be come burnt and lose it vascoity, and weight. (basicly your runing gravey through it.) lol Or the fuild is termendously dirty strained or not. FYI there are clutches in your transmission.... Have you ever heard of clutch dust? Well in an automatic because of the fuild its not clutch mud..... explaining why when its cold and the oil is super thick it has problems, but when it thins up when its warm its fine.

CHANGE YOUR FLUID & FLITER

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The 1st thing to do is have a test run on the transmission control module to see if any trouble codes are present, next have you ever serviced the transmission, fluid and filter change, should be done at 60,000 miles, on occasion this can cure problems like yours.

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