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I have a 1991 r32 gtr, and ever since I dropped the engine for a rebuild I’ve been having an issue where the attessa would fully engage on reverse and on first gear on slow speeds. It’s been happening for a year and now I hear a locked diff clunk when it engages again. The car is on a motec m800 ecu with the stock ecu also plugged in. I already bled the attessa system and changed the front n rear diff oil. I also unplugged the hicas fuse from the trunk to check if that was the issue, and I’ve checked all the fuses and all are fine. I’ll link the video of the attessa engaging. If anyone has any suggestions on what to do next let me know please. IMG_2154.MOV

Hi Guys, Before you say search threads I have both here and on UK skyline forum. So removed ABS system with a gktech abs delete kit, fitted perfect, my brakes are no good any due to big cams etc and I have kept all standard gear if one day I want to refit. Also fitted a new transfer case, and bleed it all up seems good, now have 4wd light staying on, check attessa ecu for fault codes we had 3, 2 were easy fix and one has us baffled, it's error code 8 being "abs actuator motor, motor relay or circuit. We can't figure out how to make this go away, it's like it needs the unit connected to delete this fault but why? Maybe we need to make it think something is there by bridging wires etc? Done plenty searches and there is topics on this but all very confusing, any help would be much appreciated