Question about 1994 Chevrolet K1500

1 Answer

Transmission was running fine one day and then it will go into first and second but won't shift into drive or over drive

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  • Chevrolet Master
  • 5,763 Answers

Many things could cause this, a trany bg flush may help, also if this trany has a passing gear cable to throttle check and make sure its connected and adjusted, also a 1994 is there a modulator valve and does it have vacuum to it, hope this helps.

Posted on Nov 08, 2010

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6ya6ya
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Posted on Jan 02, 2017

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SOURCE: TRANSMISSION

sounds like either a bad speed sensor or controller. shift points are too high, should be at 2000 or slightly less. if fluid is good and clean and shifts do not flair, check those control units. Not sure about calibrate...could mean out of calibration...Id ask
another tech about that. (i don't know everything!)

Posted on Mar 12, 2009

Molson02536
  • 3854 Answers

SOURCE: electronics / wiring / Transmission

You have two sensor in the transmisson which is the in put and out put speed sensor, and is located on the left side of the transmission. 
They are the primary input to the transmission control module which control your shift point and speedometer.
They are easy to replace and only held on by one bolt. Disconnect the wire connector and then the bolt. 
Replaceing is in revers and replace any fluid lost. If you could get it to the parts store and have the truck scaned, they could tell if you need both sensor or only one. Before you go out to the parts store, check the wire connections to see if there lose or broken which may be the cause of your trasmission problem.
Good luck and hope this helps and saves you some money

Posted on Apr 20, 2009

  • 1 Answer

SOURCE: subaru impreza automatic transmission won t shift

Try replacing the transmission filter and the trannie fluid. Mine would only go in reverse, and now it drives pretty well. This year has a screw on filter. Hope this helps

Posted on Apr 25, 2009

  • 543 Answers

SOURCE: My saturn was running fine. Then it would shift very hard

well if it shifts very hard into every gear that means the pressure control solenoid in the trans went bad and it causing the trans to go to max line pressure thats why it shifts so hard,,,it does that so you can still drive it even thou it broken,anyhow the PC solenoid is under the trans pan which is on the TOP of the trans under the battery,,,,not too hard a job to do, the parts are about $100 labor might be about $200,,,easy fix,,could be alot more,,,and if you dont fix it ,it will break other stuff in the trans and cost alot more,,,

Posted on Oct 12, 2009

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  • 221 Answers

SOURCE: Transmission was running great one day then the

I hate to hear that but the good thing is this may not be as bad as you think. The governor, modulator, and/or throttle cable controls the shift points on non-computer (older) controlled transmissions. On computer controlled transmissions this shifting problem could be caused by a faulty sensor or a bad connection or defective solenoid pack. These types of problems can be resolved without the expense of a transmission removal. Take it to a reputable dealer for diagnosis. I always recommend a second opinion for any recommendation of needing a total rebuild. I hope this helps.

Posted on Jul 12, 2010

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