Transmission issues after replacing radiator

[NickTransmissions]

I have fwd and reverse.. but it doesn't change gears going forward.. 1st and maybe 2nd..

Maybe 2nd?

To be clear, you do have first gear in Drive, Drive3, manual 2 and manual 1, correct?

And if the shifter is in Drive, D3 or 2 does it upshift to 2nd gear or no?

 

[SterlingT]

gotcha.. yea, only the rad..

 

[SterlingT]

Maybe 2nd?

To be clear, you do have first gear in Drive, Drive3, manual 2 and manual 1, correct?

And if the shifter is in Drive, D3 or 2 does it upshift to 2nd

If memory serves, I do not remember it shifting at all.... so, only 1st.. and it's the same all forward gears

 

[SterlingT]

You have a 4L60E...Do you have any forward movement in any range setting (D, D3, 2 or 1) or is it basically in neutral?

I have only one gear in all fwd gears... it doesn't "jerk" or skip.. it just doesn't go into any higher forward gears in any forward gear settings.. 1, 2, D3 or D

 

[NickTransmissions]

I have only one gear in all fwd gears... it doesn't "jerk" or skip.. it just doesn't go into any higher forward gears in any forward gear settings.. 1, 2, D3 or D

Ok...that sounds like what happens when the vehicle speed sensor's voltage signal is cut off or not making it to the PCM...This happens if either the VSS is bad, unplugged or the cabling leading from the VSS to the PCM is somehow damaged.

Check the VSS with a multimeter by putting either the rear or entire vehicle on jack stands. Then unplug the connector to the VSS but leave the sensor itself in place. Turn your multimeter knob to 'Volts' and then put the two leads onto the two terminals on the sensor. Spin the driveshaft to see if there is any voltage being generated as you spin the shaft...If nothing is happening, the sensor is bad...If the sensor is producing voltage then that would indicate it's functioning. Alternatively, if you have another vehicle w/the same sensor that also works normally, you can try swapping it to see if anything changes...

 

[SUBURBAN5]

Btw was the fluid still bright red or pinkish?

 

[SterlingT]

Ok...that sounds like what happens when the vehicle speed sensor's voltage signal is cut off or not making it to the PCM...This happens if either the VSS is bad, unplugged or the cabling leading from the VSS to the PCM is somehow damaged.

Check the VSS with a multimeter by putting either the rear or entire vehicle on jack stands. Then unplug the connector to the VSS but leave the sensor itself in place. Turn your multimeter knob to 'Volts' and then put the two leads onto the two terminals on the sensor. Spin the driveshaft to see if there is any voltage being generated as you spin the shaft...If nothing is happening, the sensor is bad...If the sensor is producing voltage then that would indicate it's functioning. Alternatively, if you have another vehicle w/the same sensor that also works normally, you can try swapping it to see if anything changes...

VSS.. variable speed sensor? what side of the trans is it on? Should be the only wires going to it, I imagine, right?

 

[SterlingT]

Btw was the fluid still bright red or pinkish?

yea.. pinkish red and clean..

 

[NickTransmissions]

VSS.. variable speed sensor? what side of the trans is it on? Should be the only wires going to it, I imagine, right?

VSS = Vehicle Speed Sensor...

Is the truck 2WD or 4WD?

If 2WD, it's located in the extension housing at the rear of the transmission...If a 4x4 it's going to be in the transfer case.

 

[SterlingT]

Sorry, I'm not answering right away.. I was making supper.. lol