4l80e no workie----Trans or converter?
Swapped in a used 80e and all was fine. For about a mile. Didn't whine, changed out fine, took all gears.
Cut the truck off, started it back up and it won't move in any gear. Took a line off and the is no pressure :bang::bang::bang: If I had damaged the pump installing the converter, would it have moved at all? Could it be the converter (it's new). Its throwing a p1810 code, nothing else. What do you guys think? |
Hmmm.... How was converter spacing? Not common for a 4L80 to break the pump, but it can happen. Did you pull the pan on the trans before you put it in?
Chris |
That is a fluid pressure switch code.
|
Originally Posted by Circle-D
(Post 5176396)
Hmmm.... How was converter spacing? Not common for a 4L80 to break the pump, but it can happen. Did you pull the pan on the trans before you put it in?
Chris Pulled the pan and everything looked fine. Blake, Chevroletalltheway, installed a Sonnax boost valve for me and said everything he saw looked good as well. He runs a trans shop.
Originally Posted by 03sierraslt
(Post 5176399)
That is a fluid pressure switch code.
|
Looks like you have a range of possibilities:
Circuit Description with 4L80-E / 4L85-E Automatic Transmission The automatic transmission fluid pressure (TFP) manual valve position switch consists of five normally-open pressure switches. The powertrain control module (PCM) supplies battery voltage to each range signal. By grounding one or more of these circuits through various combinations of the pressure switches, the PCM detects what manual valve position has been selected, and compares the actual voltage combination of the switches to a TFP manual valve position switch combination table stored in memory. The TFP manual valve position switch assembly cannot distinguish between PARK and NEUTRAL because the monitored valve body pressures are identical in both cases. With the ignition ON and the engine OFF, D2 is indicated. When the transmission 20-way connector is disconnected, the ground potential for the three range signals to the PCM is removed, and with the ignition ON, D2 is indicated. If the PCM detects an invalid state of the TFP manual valve position switch circuit by deciphering the TFP manual valve position switch inputs, then DTC P1810 sets. DTC P1810 is a type C DTC. For California emissions vehicles and vehicles under 8,600 GVW, DTC P1810 is a type B DTC. Conditions for Running the DTC
DTC P1810 sets on the first occurrence in which any of the following condition occurs: Condition 1 The PCM detects an illegal TFP manual valve position switch state for 60 seconds. Condition 2
|
That's a long description to not really say what causes it. ha
I unplugged all the connectors to eliminate wiring issues since it should default to 2nd gear, but still nothing :bang: |
Thats not a typed out description its a copy and paste for your troubleshooting. There is no for sure way to know with the info that is given so far. I know some of those sensors were known to have issues but the fact that you unplugged it and had no second gear and the fact that you had no fluid flow out of the ports leads me to suspect the pump. I am no trans expert though.
|
No, I wasn't dogging on you at all. I know that was a copy paste.
Just meant that the code has to be the most generic one possible! |
Was the converter fully seated in the transmission before you installed the trans? Should be right around 1" from the pads to the bellhousing.
|
Also, how was the fluid level? You can't trust the factory dipstick. The ideal fluid level (even with the case/trans pan interface) on mine was about 2" from the end of the dipstick, which is significantly above the top end of the hot mark on the dipstick.
|
All times are GMT -5. The time now is 08:29 PM. |
© 2024 MH Sub I, LLC dba Internet Brands