Hayabusa Posted July 28, 2007 Share Posted July 28, 2007 Can I convert ls1 Engine with auto trans to t56? Will there be any problems with the ecu and harness after the change. Will the car run with that setup? Thanks Quote Link to comment Share on other sites More sharing options...
m1noel Posted July 28, 2007 Share Posted July 28, 2007 I believe you can easily change the ECM program for the Manual. I can do mine with my predator. Mike Quote Link to comment Share on other sites More sharing options...
qwik240z Posted July 28, 2007 Share Posted July 28, 2007 Can I convert ls1 Engine with auto trans to t56? Will there be any problems with the ecu and harness after the change. Will the car run with that setup? Thanks The LS1 I bought came with a 4L60E auto trans. I bought a T-56 and installed it in place of the auto. The car ran fine with the computer as-is from the auto. I drove it that way for several months before I finally had it reprogrammed for the 6 speed. It did throw a few codes and the signal for the speedo was wrong but other then that, it still worked fine. Quote Link to comment Share on other sites More sharing options...
Hayabusa Posted July 28, 2007 Author Share Posted July 28, 2007 Thanks Quote Link to comment Share on other sites More sharing options...
TheNeedForZ Posted July 31, 2007 Share Posted July 31, 2007 like qwik240z said, you can prolly convert easily from auto to manual because with MT the driver controls all the shifting. Converting MT to auto might pose a problem as the software and sensor that control automatic shifting might not exist in the MT car. I know converting from M6 to A4 is not what you want, but I am just saying. I am still torn between A4 and M6...qwik240z, do you still have the auto trans? Quote Link to comment Share on other sites More sharing options...
SSflyer Posted July 31, 2007 Share Posted July 31, 2007 Yup, I did mine. You'll want to check the ECM pinouts because there's a couple that are different from auto to manual. Also, you'll need to wire in a clutch switch to take the place of the neutral safety switch. Quote Link to comment Share on other sites More sharing options...
Hayabusa Posted January 24, 2008 Author Share Posted January 24, 2008 Does anyone know someone who can rewire the harness? Quote Link to comment Share on other sites More sharing options...
VinhZXT Posted January 24, 2008 Share Posted January 24, 2008 You don't need to rewire the harness. The PCM connectors should have all the wires to support auto trans or the T56. For the auto trans the PCM controls the TCC (Torque converter clutch) and it needs the input signal from the brake. For the T56 I forgot what the PCM controls but it needs the input signal from the clutch. If you need wiring info let me know. I will have to go back to do some more reading on the T56. GL Vinh PS. I can rewire the harness also. Quote Link to comment Share on other sites More sharing options...
COZY Z COLE Posted January 25, 2008 Share Posted January 25, 2008 You don't need to rewire the harness. The PCM connectors should have all the wires to support auto trans or the T56. For the auto trans the PCM controls the TCC (Torque converter clutch) and it needs the input signal from the brake. For the T56 I forgot what the PCM controls but it needs the input signal from the clutch. If you need wiring info let me know. I will have to go back to do some more reading on the T56. GLVinh PS. I can rewire the harness also. That's the kind of post I love to see in that you get an answer and an offer to help all at the same time.... Only on HybridZ:smile::smile:. LARRY Quote Link to comment Share on other sites More sharing options...
VinhZXT Posted January 25, 2008 Share Posted January 25, 2008 Larry, lol.. Here is the PCM wiring pinouts that I save only the wires that have something to do with both transmissions. Most of these are for the auto trans. I remember there are 3 connectors on the T56 and they are for: Reverse lock out selenoid, Skip shift selenoid and the last one is the reverse light switch. The reverse light switch wires do not go to the PCM. So you just need to remove all the wires for the auto trans and hook up 4 wires from the T56 to the PCM for the reverse lock out selenoid and the skip shift selenoid. Important: Make sure you get the connectors to all the sensors/switches on the T56. GL Vinh Document ID# 1021267 2004 Pontiac GTO -------------------------------------------------------------------------------- Powertrain Control Module (PCM) Connector End Views Table 1: PCM Connector C1 Table 2: PCM Connector C2 PCM Connector C1 Connector Part Information PCM Connector C1 92231110 80-Way Micro-Pack 100W Series Sealed (BU) Pin Wire Color Circuit No. Function 17 YE 1225 Transmission Fluid Pressure Switch Signal B 18 GY 1226 Transmission Fluid Pressure Switch Signal C 32 BU/WH 771 Transmission Range Switch Signal A 33 BN 86 Cruise Control Release Signal 34 WH 776 Transmission Range Switch Signal P 53 BK/WH 2762 Low Reference - TFT Sensor 72 YE/RD 772 Transmission Range Switch Signal B 79 GN/WH or GY 898 or 587 Shift Solenoid Valve 3 High Control - Skip/Shift Solenoid Control PCM Connector C2 Connector Part Information PCM Connector C2 92231110 80-Way Micro-Pack 100W Series Sealed (GN) Pin Wire Color Circuit No. Function 2 BN 418 TCC PWM Solenoid Valve Control 6 RD 1228 PC Solenoid Valve High Control Sol.A 8 GY/BU 1229 PC Solenoid Valve Low Control Sol.A 20 TN 1231 AT ISS Low Signal 21 BU/WH 1230 AT ISS High Signal 42 GY/RD 422 TCC Solenoid Valve Control 44 YE 1652 Reverse Lock Out Solenoid Control 47 YE/BK 1223 2-3 Shift Solenoid Valve Control 48 L-GN 1222 1-2 Shift Solenoid Valve Control 51 YE/BK 1227 TFT Sensor Signal 62 GY 773 Transmission Range Switch Signal C 63 BN/YE 1224 Transmission Fluid Pressure Switch Signal A -------------------------------------------------------------------------------- Document ID# 1021267 2004 Pontiac GTO Quote Link to comment Share on other sites More sharing options...
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