OD in my 4l80e doesn't work correctly...
#1
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My '92 K2500 4x4 has a 4l80e trans. My OD is not functioning right or left (ha). OD engages upto about 65 mph but then it downshifts to 3rd.
I have changed alot things, close to rebuilding the dang thing. I changed the solenoids because when it shifted, it slammed in each gear.
Here is a small list of the things that I have changed:
converter
solenoid (three sets, last one from GM)
pressure reg
od solenoid
cleaned the valve body
ECM
TPS![Bang Head](https://ls1tech.com/forums/images/smilies/LS1Tech/gr_banghead.gif)
I recently scanned the trans and I saw that the speed that the trans was showing was about 20 more than the speedo was registering.
Is this correct? I asked a couple of mechanic friends but they did not know alot about electronic trans.
After reading alot different forums and websites, I have found out that the computer may think that it is towing something and that maybe the reason for the downshift.
Is there a method of calibrating the little box that reads the speed sensor (VSS)?![Icon Confused](https://ls1tech.com/forums/images/smilies2/icon_confused.gif)
If there are any other suggestions, I would like to hear them.
Thanks for any help in advance.
I have changed alot things, close to rebuilding the dang thing. I changed the solenoids because when it shifted, it slammed in each gear.
Here is a small list of the things that I have changed:
converter
solenoid (three sets, last one from GM)
pressure reg
od solenoid
cleaned the valve body
ECM
TPS
![Bang Head](https://ls1tech.com/forums/images/smilies/LS1Tech/gr_banghead.gif)
I recently scanned the trans and I saw that the speed that the trans was showing was about 20 more than the speedo was registering.
Is this correct? I asked a couple of mechanic friends but they did not know alot about electronic trans.
After reading alot different forums and websites, I have found out that the computer may think that it is towing something and that maybe the reason for the downshift.
Is there a method of calibrating the little box that reads the speed sensor (VSS)?
![Icon Confused](https://ls1tech.com/forums/images/smilies2/icon_confused.gif)
If there are any other suggestions, I would like to hear them.
Thanks for any help in advance.
#4
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I did scan it a few days ago but the only thing I remember is the mph difference. i will need to go back to my friend and get the specs from the file I saved on the scanner.
Is there any specs I need to watch for?
Is there any specs I need to watch for?