4l80e swap problems
Jun 28, 2014 | 10:47 AM
#1
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Staging Lane
Joined: Mar 2012
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4l80e swap problems
Just to let you guys know
2003 gmc sierra
2006 lq9
2007 4l80e swap in process
Ok, Texas speed tuned ecu for the swap, i did the factory harness repin at the transmission connector. I added a speed sensor to the front sensor(bc obviously the 80e has 2 sensors)I'm hoping the front is the one I was supposed to run to the ECU... red to 22 and blue to 23. Neutral Safety Switch is good, I put a shift kit in from tci, with the trans already in. I triple checked the check valve ***** but that's not to say I didn't make a mistake there. I know when I mounted the valve body everything went in cleanly. I have a used 4l80e with a circle d converter with 3000 stall and circle d flex plate. all that seems to be fine...
well i started the truck up and went through all the steps of going through the gears. it went in all the gears but didn't really "jerk" when it went it gear but didn't think much of it. I put it in drive to drive it down the street and got to a stop sign and gave it just a little gas and the truck kind of slipped and jerked and just started jerking really bad. I turned the truck off and put a quart of fluid in it( totaling 13 quarts). I started it back up to go back to the drive way and i didn't really have any gears. 1st would go but it was under a lot of stress. So I had a lot more gear in reverse so i backed it up to the driveway and parked it and that where I am at now. I used a circle d converter and flex plate. I wonder if it needs spacers between the torque converter and the flex plate. When I tightened the bolts to the flex plate and converter, I felt like it may have slipped out just a tap but have read everywhere that if its 1/8 of an inch before installing the bolts it was perfect. I don't know if this is even part of the problem but I wonder if thats why It slipped like that and I really don't have any gears now. They are there but it really won't go. almost like the Ebrake is still on, which its not. I checked before all this and after all this. Where should I start?
So I added the spacers to see if that would help to the flex plate to the converter and that didn't help. My truck will go in gear better but still won't come close to shifting out of 1st. I put it in gear "1" and it was better but still didn't have "power" and then died. The speedo works and rpm works. I think its electrical related. any advice?
2003 gmc sierra
2006 lq9
2007 4l80e swap in process
Ok, Texas speed tuned ecu for the swap, i did the factory harness repin at the transmission connector. I added a speed sensor to the front sensor(bc obviously the 80e has 2 sensors)I'm hoping the front is the one I was supposed to run to the ECU... red to 22 and blue to 23. Neutral Safety Switch is good, I put a shift kit in from tci, with the trans already in. I triple checked the check valve ***** but that's not to say I didn't make a mistake there. I know when I mounted the valve body everything went in cleanly. I have a used 4l80e with a circle d converter with 3000 stall and circle d flex plate. all that seems to be fine...
well i started the truck up and went through all the steps of going through the gears. it went in all the gears but didn't really "jerk" when it went it gear but didn't think much of it. I put it in drive to drive it down the street and got to a stop sign and gave it just a little gas and the truck kind of slipped and jerked and just started jerking really bad. I turned the truck off and put a quart of fluid in it( totaling 13 quarts). I started it back up to go back to the drive way and i didn't really have any gears. 1st would go but it was under a lot of stress. So I had a lot more gear in reverse so i backed it up to the driveway and parked it and that where I am at now. I used a circle d converter and flex plate. I wonder if it needs spacers between the torque converter and the flex plate. When I tightened the bolts to the flex plate and converter, I felt like it may have slipped out just a tap but have read everywhere that if its 1/8 of an inch before installing the bolts it was perfect. I don't know if this is even part of the problem but I wonder if thats why It slipped like that and I really don't have any gears now. They are there but it really won't go. almost like the Ebrake is still on, which its not. I checked before all this and after all this. Where should I start?
So I added the spacers to see if that would help to the flex plate to the converter and that didn't help. My truck will go in gear better but still won't come close to shifting out of 1st. I put it in gear "1" and it was better but still didn't have "power" and then died. The speedo works and rpm works. I think its electrical related. any advice?
Last edited by bmorrow8; Jun 28, 2014 at 02:30 PM. Reason: update with more info
Jun 28, 2014 | 01:15 PM
#6
Jun 28, 2014 | 02:02 PM
#7
Good to hear. I am sure you know what I am getting at, but to someone who has never driven a stall it could feel like the parking brake was still on, your the truck was slipping in gear, etc.
