4l80e no workie----Trans or converter?
12-29-2013, 08:53 PM
#22
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Fairly certain it is not the converter. For the transmission pump to pump all the converter has to do is spin the pump gears. Technically the converter could be empty and you would still have pump pressure. Do you think maybe something happened with the boost valve install and it is dumping off all the line pressure?
Chris
Chris
12-29-2013, 08:53 PM
#23
Installing a trans/converter should be a very precise process.
There are 3 absolutely critical steps
#1) Ensure the converter is fully seated. 1.030" from converter pads to bellhousing face on the 4l80e. This was a royal PITA to get mine fully seated, I'm guessing the billet input shaft had something to do with that. I also had the stock 4l80e and converter there so I could compare.
#2) Ensure 1/16-3/16" converter pad to flexplate spacing (2/16 to 3/16" is ideal on the 4l80). Sounds like you did this correctly. I'm also guessing you did you have converter fully seated. If it wasn't there's a good chance you wouldn't have any spacing to the converter or at the very least wouldn't need the shims.
#3) Ensure proper fluid level. Low fluid is far worse than too much. I was even advised to run mine up to 1/2 quart over full. I would recheck your fluid level and if it's low add more and see how it responds.
There are 3 absolutely critical steps
#1) Ensure the converter is fully seated. 1.030" from converter pads to bellhousing face on the 4l80e. This was a royal PITA to get mine fully seated, I'm guessing the billet input shaft had something to do with that. I also had the stock 4l80e and converter there so I could compare.
#2) Ensure 1/16-3/16" converter pad to flexplate spacing (2/16 to 3/16" is ideal on the 4l80). Sounds like you did this correctly. I'm also guessing you did you have converter fully seated. If it wasn't there's a good chance you wouldn't have any spacing to the converter or at the very least wouldn't need the shims.
#3) Ensure proper fluid level. Low fluid is far worse than too much. I was even advised to run mine up to 1/2 quart over full. I would recheck your fluid level and if it's low add more and see how it responds.
Mine was a PITA to fully seat also with my billet input shaft. They are machined for a tighter fit. A stock setup should stab together easily.
12-29-2013, 08:59 PM
#25
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Installing a trans/converter should be a very precise process.
There are 3 absolutely critical steps
#1) Ensure the converter is fully seated. 1.030" from converter pads to bellhousing face on the 4l80e. This was a royal PITA to get mine fully seated, I'm guessing the billet input shaft had something to do with that. I also had the stock 4l80e and converter there so I could compare.
#2) Ensure 1/16-3/16" converter pad to flexplate spacing (2/16 to 3/16" is ideal on the 4l80). Sounds like you did this correctly. I'm also guessing you did you have converter fully seated. If it wasn't there's a good chance you wouldn't have any spacing to the converter or at the very least wouldn't need the shims.
#3) Ensure proper fluid level. Low fluid is far worse than too much. I was even advised to run mine up to 1/2 quart over full. I would recheck your fluid level and if it's low add more and see how it responds.
There are 3 absolutely critical steps
#1) Ensure the converter is fully seated. 1.030" from converter pads to bellhousing face on the 4l80e. This was a royal PITA to get mine fully seated, I'm guessing the billet input shaft had something to do with that. I also had the stock 4l80e and converter there so I could compare.
#2) Ensure 1/16-3/16" converter pad to flexplate spacing (2/16 to 3/16" is ideal on the 4l80). Sounds like you did this correctly. I'm also guessing you did you have converter fully seated. If it wasn't there's a good chance you wouldn't have any spacing to the converter or at the very least wouldn't need the shims.
#3) Ensure proper fluid level. Low fluid is far worse than too much. I was even advised to run mine up to 1/2 quart over full. I would recheck your fluid level and if it's low add more and see how it responds.
I know. Sad face. Just trying to see if it's something I can fix, or if I should just throw in the towel and get a factory reman.
