Thread: No 1st, 3rd, or 4th...0742, 0756 Codes

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  1. #1 No 1st, 3rd, or 4th...0742, 0756 Codes 
    GT Level Member japslpr's Avatar
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    Dave,
    I'm gonna go ahead and gear this question towards you.

    I just finished up putting my tranny back together lastnight and tested it out. The transmission sounds normal, no whining or metal sounds.

    I have Forward and Reverse.

    I only seem to have 2nd gear, no matter what position the gear selector is in.

    No codes came on until 15 minutes of driving while I was changing the gear selector to see if I could get the car to shift into 3rd. Once the codes did show up, here is what I got.
    0742 - TCC System Stuck on. I did install the new Sonnax valve with the teflon seal, but the converter didn't stick until the tranny temp reached 225* and I was 30 minutes into the drive.

    0756 - 2-3 shift solenoid valve - Performance (No First or Second Gear)
    I think this is the problem. I installed 2 new shift solenoids in the valve body. I believe they are the 1-2 & 2-3 shift solenoids. But at the same time, I changed the wiring harness as well because on of the retainer clips broke, so I used one of my old harnesses.

    So I think my problem is in the internal wiring harness that I changed. Because 1, of the 2-3 shift solenoid issue and 2, my performance shift light cuts off when I put the car in 4th or 3rd gear, but comes on when the car is in Neutral or Park....weird.

    Dave, Do you have any other suggestions or things I can try? Is there any pinouts on the big tranny plug I can ohm out or check? Is my thinking right with the 2-3 shift solenoid?
    Last edited by japslpr; 10-16-2008 at 08:41 AM.
    Jae Harris: 1999 GTP, PARTED OUT
    1997 GTP: K&N 9", Stage 3 Gen 3, ZZP Hub w/ 3.25, S/S Headers, T&D Split Ratio RR (I-1.6, E-1.7), DHP 1.0, BEAR Big Brake Kit, 17x9 Cobra R's, GMPP Strut Towers F/R, Stage 1 Custom Cam
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