2004 GMC sierra 5.3 eng 1500 transmission shutter 40-55 mph

1994 GMC 4l60e transmission shifting problems - CarGurus

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CarGurusJan 17, 2011 - 1994 GMC 4l60e transmission shifting problems - I've got a 1994 GMC Sierra 4X4 5.7 I ... If you put it in low and lift the handle, it will go into second .... Justchange 1-2 - 3-4 solenoids first and if that doesn't work change the ...

Troubleshoot automatic transmission problems

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Jul 15, 2015 - Rescan the PCM for trouble codes, if none appear the problem could ...Excessively low transmission fluid (Note: If transmission is operated for an .... it waslow, and now my car will only shift from 1st to 2nd manually and will ...

It sounds like the catalytic converter could be clogged up.

Check the transmission computer

This transmission is shifted by a computer via electric solenoids that open and close hydraulic fluid pressure passages when signaled by the computer control, so any kind of a problem with the external wiring harness to the valve body or the valve body wiring harness or the PCM (powertrain control module can cause this symptom. The most common cause of your particular problem is a damaged open or shorted shift solenoid, this causes the transmission to go into two gears at once, the computer senses this and shifts the transmission to neutral to stop any damage to the transmission.

Scan for any transmission codes If none are present, change the filter.

those are hi-tech trannys better let professional check it

Check for a vacuum leak to the transmission modulator. the modulator is on the trans abd has a vacuum hose on it.

Check transmission lock up selenoid.

if it has a 4.3 liter motor a 86 to a 97 if it has a 350 motor a 81 to a 96 will work hope this helps

hello: i have a 1994 GMC SIerra 1/2 ton 2 wd, the first two gears shift find but when you get up to about 55 or 60 mph, the transmission wont shift.