4l80E swap P0742
11-10-2017, 08:45 AM
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4l80E swap P0742 I built a 4l80E for a friends 2000 turbo 5.3 camaro and slowly but surely we are getting things working right with the transmission. We struggled to find issues with the TCC applying at strange times as seen here in this thread https://ls1tech.com/forums/automatic...l#post19595569
He ended up buying a rebuilt valvebody and we recently installed it. Everything works perfect now... until it through a P0742 code (converter clutch circuit stuck on). The 4l80e is a dual fed unit with Jakes stage 2 kit installed. It has a Circle D triple disk converter. The new valvebody is supposed to have all new solenoids/EPC/TCC regulator (I assume a Sonnax) Has anybody had experience with this code on a 4l80E?
He ended up buying a rebuilt valvebody and we recently installed it. Everything works perfect now... until it through a P0742 code (converter clutch circuit stuck on). The 4l80e is a dual fed unit with Jakes stage 2 kit installed. It has a Circle D triple disk converter. The new valvebody is supposed to have all new solenoids/EPC/TCC regulator (I assume a Sonnax) Has anybody had experience with this code on a 4l80E?
Last edited by 99pewterZ71; 11-10-2017 at 08:53 AM.
11-16-2017, 09:50 PM
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Just to update for anybody doing a search we finally figured it out. We have suspected a segment swap issue for a long time now but not being extremely knowledgeable with hptuners I wasn’t 100% convinced, but we were running out of options. I started reading and the OS From his Camaro was 936036 which it turns out GM never made a 4l80e truck with that OS so it seems to be hit or miss using a same year different OS segment swap. Luckily he owns and daily drives my sisters old 2000 Z28 that happened to be unlocked and had a different more common OS 9360361 which we easily found a matching OS. I transferred all the tune setting over after completing the segment swap and did a “write entire”. And bingo. The trans works perfect and the TCC acts as it should. Hope this can help somebody in the future.