Question about Cars & Trucks
I have reverse gear. can use sift for second gear, but car is stuck in3rd
Posted by Anonymous on
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Posted on Jan 02, 2017
it does seem that that might be the problem. the only way that you can fix it is to go through the ecm and reset it. this requires a diagnostic scan tool not just a code reader. when the tcm was changed was the ecm cleared?. if not this would explain alot because the ecm still thinks there is a fault. please rate this thanks.
Posted on Sep 28, 2008
most newer vehicles have transmission control modules,that go to a default of 2nd or 3rd gear when they go bad! I had a 91 plymouth stuck in 3rd gear because of this module! could be your problem! when mine went out, it smelled like something electrical burned inside the the passenger cabin! I would check all the electrical connections on the transmission first good luck
Posted on Jan 05, 2009
SOURCE: vehical stuck in limp mode
This only applies if you have an allison transmission, which based on the problem you are reporting I would guess that you do.
It sounds like your vehicle is stuck in limp mode. This is probably due to a bad NSBU switch(Neutral, saftey, back up) (if you have an allison transmission. Prior to 2002 the NSBU switches had a very poor seal which resulted in water intrusion into the NSBU switch causing corrosion. If the switch is corroded it is likley confusing your transmission. Unfortunatly you cannot repair the bad switch, it needs to be replaced. If you order one through Chevy it will cost around 200 dollars. I found one at merchant Automotive for 91 dollars. ( http://www.merchant-automotive.com/allisonnsbuswitch2001-2004.aspx ).
The switch is relativly easy to replace. the electrical connections are the hardest part as they are glued into the switch. A little heat from a butane torch should soften it up and make the connectors slide off more easily. Other wise you may have to break the NSBU switch appart to remove the connectors.
I replaced the switch for the first time and it took me 15 minutes.
Posted on Apr 22, 2009
the car has the capablilites to give data and codes. You gunna need a professional if you dont have access to a scanner and multimeter. Otherwise were just guessing.
I hate telling people that its out of their hands but sometimes its best to let the pro diag it and then you can repair it if you capable
Posted on Nov 26, 2009
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