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Tc Acting Up.

xobloot

By xobloot
in Ask A GM Technician

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xobloot New Member

xobloot

Posted
Posted

My 2000 Silverado has automatic transmission/transfer case problem: It feels like it is momentarily hung between 4wd and 2wd without any attempt to shift anything by the driver. Always seems to strike at a very slow unloaded roll, or from a stop it will allow the engine to rev like it isn't in gear and then suddenly jump into gear with violent force! This is accompanied for awhile by a jing-a-ling noise like a gear spinning loosely around a shaft. If I stop and electronically shift it back and forth between 4wd and 2wd it will usually act correctly, but keeps noises for a good while, and then completely quiet again! I have already changed the internal cab/dash electronic shift control switch, and also the transfer case shift solenoid assy.

 

I have read where a problem in the behind the dash wiring is too tight, and causes some electronic wiring plugs to partially pull apart a bit and cause the AC/heat control capability to go bonkers! Any chance this could be a duplification of errors on two different control systems? After all, they are right there together!

 

Either way, please let me know about the transfer case/ transmission problem if you can. That is my primary worry!

 

I have the AC/heat problem as well, but I am still able to drive the vehicle without having to have heat/AC! I can turn it off with one fuse!

 

DeWayne Ross/Georgia

BigSilver Enthusiast

BigSilver

Posted
Posted
My 2000 Silverado has automatic transmission/transfer case problem: It feels like it is momentarily hung between 4wd and 2wd without any attempt to shift anything by the driver. Always seems to strike at a very slow unloaded roll, or from a stop it will allow the engine to rev like it isn't in gear and then suddenly jump into gear with violent force! This is accompanied for awhile by a jing-a-ling noise like a gear spinning loosely around a shaft. If I stop and electronically shift it back and forth between 4wd and 2wd it will usually act correctly, but keeps noises for a good while, and then completely quiet again! I have already changed the internal cab/dash electronic shift control switch, and also the transfer case shift solenoid assy.

 

I have read where a problem in the behind the dash wiring is too tight, and causes some electronic wiring plugs to partially pull apart a bit and cause the AC/heat control capability to go bonkers! Any chance this could be a duplification of errors on two different control systems? After all, they are right there together!

 

Either way, please let me know about the transfer case/ transmission problem if you can. That is my primary worry!

 

I have the AC/heat problem as well, but I am still able to drive the vehicle without having to have heat/AC! I can turn it off with one fuse!

 

DeWayne Ross/Georgia

 

For what its worth, I'm guessing that its an electrical issue. You may consider cleaning the ground points related to that part of the circuit. For that matter, seeing how old your vehical is, clean all the ground connections, and/or splice in new ground points. Its rediculous what havoc a little rust at a ground point can do.

  • 1 year later...
kevin ramsey New Member

kevin ramsey

Posted
Posted
My 2000 Silverado has automatic transmission/transfer case problem: It feels like it is momentarily hung between 4wd and 2wd without any attempt to shift anything by the driver. Always seems to strike at a very slow unloaded roll, or from a stop it will allow the engine to rev like it isn't in gear and then suddenly jump into gear with violent force! This is accompanied for awhile by a jing-a-ling noise like a gear spinning loosely around a shaft. If I stop and electronically shift it back and forth between 4wd and 2wd it will usually act correctly, but keeps noises for a good while, and then completely quiet again! I have already changed the internal cab/dash electronic shift control switch, and also the transfer case shift solenoid assy.

 

I have read where a problem in the behind the dash wiring is too tight, and causes some electronic wiring plugs to partially pull apart a bit and cause the AC/heat control capability to go bonkers! Any chance this could be a duplification of errors on two different control systems? After all, they are right there together!

 

Either way, please let me know about the transfer case/ transmission problem if you can. That is my primary worry!

 

I have the AC/heat problem as well, but I am still able to drive the vehicle without having to have heat/AC! I can turn it off with one fuse!

 

DeWayne Ross/Georgia

 

 

I have the same problem in my 04 2500hd. I had a pretty knowledgable buddy tell me its the transfer case chain slipping. When put into 4wd, the gear will tighten the chain up and eliminate it from slipping. I have not fixed my issue yet. I just want more info before I start to tear it apart.

kevin ramsey New Member

kevin ramsey

Posted
Posted
My 2000 Silverado has automatic transmission/transfer case problem: It feels like it is momentarily hung between 4wd and 2wd without any attempt to shift anything by the driver. Always seems to strike at a very slow unloaded roll, or from a stop it will allow the engine to rev like it isn't in gear and then suddenly jump into gear with violent force! This is accompanied for awhile by a jing-a-ling noise like a gear spinning loosely around a shaft. If I stop and electronically shift it back and forth between 4wd and 2wd it will usually act correctly, but keeps noises for a good while, and then completely quiet again! I have already changed the internal cab/dash electronic shift control switch, and also the transfer case shift solenoid assy.

 

I have read where a problem in the behind the dash wiring is too tight, and causes some electronic wiring plugs to partially pull apart a bit and cause the AC/heat control capability to go bonkers! Any chance this could be a duplification of errors on two different control systems? After all, they are right there together!

 

Either way, please let me know about the transfer case/ transmission problem if you can. That is my primary worry!

 

I have the AC/heat problem as well, but I am still able to drive the vehicle without having to have heat/AC! I can turn it off with one fuse!

 

DeWayne Ross/Georgia

 

 

I got into my tc today and found out it was the range shift fork. There is plastic on the inside of the fork and it will wear out. It was definately wore out, it was $43 to fix.

gmtech4 Senior Enthusiast

gmtech4

Posted
Posted
My 2000 Silverado has automatic transmission/transfer case problem: It feels like it is momentarily hung between 4wd and 2wd without any attempt to shift anything by the driver. Always seems to strike at a very slow unloaded roll, or from a stop it will allow the engine to rev like it isn't in gear and then suddenly jump into gear with violent force! This is accompanied for awhile by a jing-a-ling noise like a gear spinning loosely around a shaft. If I stop and electronically shift it back and forth between 4wd and 2wd it will usually act correctly, but keeps noises for a good while, and then completely quiet again! I have already changed the internal cab/dash electronic shift control switch, and also the transfer case shift solenoid assy.

 

I have read where a problem in the behind the dash wiring is too tight, and causes some electronic wiring plugs to partially pull apart a bit and cause the AC/heat control capability to go bonkers! Any chance this could be a duplification of errors on two different control systems? After all, they are right there together!

 

Either way, please let me know about the transfer case/ transmission problem if you can. That is my primary worry!

 

I have the AC/heat problem as well, but I am still able to drive the vehicle without having to have heat/AC! I can turn it off with one fuse!

 

DeWayne Ross/Georgia

 

 

I got into my tc today and found out it was the range shift fork. There is plastic on the inside of the fork and it will wear out. It was definately wore out, it was $43 to fix.

 

 

 

$43 for the part ,not the repair ,overhauls are about 4-5 hrs labour at a garage however if a guy can follow a book ,they are very simple to repair with a little knowledge.

 

don't throw parts at it ,get it diag'd,the garage is on the hook for a bad diag.

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