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Search Auto Parts Search 1997chevy s10 4x4 wont shift sometimes Sign up here!   Email This Post Auto Repair Home>> Automotive Repair>> Transmission Problems rogdar User Dec 21, 2010, 3:04 PM Post #1 of 4 (2779 views) 1997chevy s10 4x4 wont shift sometimes Sign In i have a 1997 chevy s 10 4x4 .i was just driveing down the road .Doing about 30 miles a hour .Truck down shifted into second wouldnt shift back to drive .Pulled off the road, turned the truck off.Took off again the truck shifted fine.A couple of days later samething.No lights came on nothing ,just would,nt shift. A friend of mine told me it was my ignition,so ichanged the steering collum.Truck ran fine for two to three weeks .Today it started again.Truck has a 120,000 miles on it .Transmission shifts great when shifts .I just cant,t believe its the transmission.Every time i shut it off ,andtake off again it shifts fine .Maybe for aday maybe for a week or two ,but i know its going to do it again.All i just remembered the speedometer quits working ,when it wont shift as soon as it shifts it starts working again.Sometimes if i realy get on it .It will shift. I have some knowledge about cars ,but i dont, have a clue. i,m ready for some help .ANYONE TransmissionGuy New User Dec 21, 2010, 8:51 PM Post #2 of 4 (2772 views) Re: 1997chevy s10 4x4 wont shift sometimes Sign In When your speedometer looks like this (link deleted)it is impossible for the computer to know how fast you're going. And if the computer doesn't know how fast you're it doesn't know where to set the shift point on the transmission. It then goes into a fail safe or limp-in mode and stays in one gear. When you are turning off the key and re-starting, the speedometer starts working and the truck shifts again. So to start with you should check the speed sensor and all of the wiring and connections from the speed sensor to the PCM. You'll probably find that is where the problem lies. Good Luck (This post was edited by Jeff Norfolk on Dec 21, 2010, 9:18 PM) oxracing User Dec 23, 2010, 9:35 PM Post #3 of 4 (2752 views) Re: 1997chevy s10 4x4 wont shift sometimes Sign In i also had one do that and it was in the second ignition wire from the ignition switch, the vehicle would start and run fine but without power on that wire, it puts the transmission into a limp home mode. its a white wire from the ignition switch. not sure but happened to me so just mentioning it. Sidom Veteran / Moderator Dec 23, 2010, 10:12 PM Post #4 of 4 (2749 views) Re: 1997chevy s10 4x4 wont shift sometimes Sign In Good suggestion.............easy enough to check out and doesn't cost anything....   Email This Post   Automotive Repair     Auto Body Repair and Refinishing     Heating or AC Issues     Electrical and Wiring     Brake Systems     Car Stereo Repair Advice     General Discussions     Car Making Funny Noises     Engine Fault Codes     Engine Troubles     Exhaust Systems     Steering and Suspension     Transmission Troubles     Tricks of the Trade Automotive World     General Discussions     Antique Car Talk     Car Shows and Events     The Bargin Bin     Motor Vehicle Inspection     Car Care Tips     Traffic Tickets     Gasoline, Motor Oils, Concept Cars and Engines     Auto Insurance, Financing, Leases, Warranties Truck Repair     General Discussions     Truck Engine Repair     Truck Suspension Repair Motorcycle Repair     General Discussions     Motorcycle Engine Repair CarJunky     Open Posting     Board FAQ's     New Board Suggestions

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