Question about GMC Cars & Trucks
Depending on type of tranny it could be a variety of problems. Possible governor on the side of the tranny on older 350 turbo hydromatics. If 700 it will most likely be internal
Posted on Apr 12, 2015
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Posted on Jan 02, 2017
i have heard that the ignition switch can be faulty and not let the full voltage thru to the electricaly controlled 4l60e trans.i have the same problem with my 95 1/2 t. i rigged a switched wire from the fuse block via a relay to the proper wire on the trans....ask a trany tech and they will know what im talking about,,,good luck
Posted on Oct 30, 2008
what year is vehicle please ?? as people often put it in wrong catagory ,if its mazada 2007 then its dealer only as a computer controls it all and the software is factory encrypted to stop general garages from repairing it .But check for a vacumn pipe loose under bonnet ,thin rubber pìpe from inlet manifold to gearbor or a diaphram switch,
Posted on Feb 19, 2009
Your transmission has 3 shift rails...
1st - 2nd
If your 3rd gear doesn't work , you have an internal transmission problem, such as a syncronizer, or similar fail... There is not much you can fix, without removeing the transmission.
Posted on Nov 30, 2009
Most likely the second gear section of the transmission has gone bad. There are 3 or 4 different gear sections or assemblies in an automatic transmission, when they go bad, they go bad.
Posted on Mar 07, 2010
Drop the pan, odds are the shift solenoid is out, its located at the front of the trans on the driver side. I'm sure your check engine light is on that will comment about the timing/shift solenoid being bad. I had the same problem with mine. The solenoid had plastic coming out of the inside. To remove it you'll find a small C clip holding it in, just take a small screw driver and pull the clip out. The part cost me like $36 from my local dealership. And its a longer solenoid. I believe its the 3-2 downshift solenoid. I do have the part number if you need it.
Posted on Apr 25, 2010
Testimonial: "Thank you so much. I actually thought this was the problem, but i didn't know. Thanks again!! send me the part number"
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