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  1. Z

    C1 Clutches Toast

    So I found the problem...
  2. Z

    C1 Clutches Toast

    He has disassembled the valve body and cleaned it. Nothing was stuck though.
  3. Z

    C1 Clutches Toast

    Camdenton, Missouri
  4. Z

    C1 Clutches Toast

    That's what I'm saying. I don't know why he even agreed to look at it if he doesn't know anything about Allisons. Apparently he got reverse to work again and it's creeps in drive now like it used to. Throwing a P0731 now and staying in 5th gear limp mode. I'm just assuming the C1s are fried.
  5. Z

    C1 Clutches Toast

    Sorry it took so long. I just heard back from him today. After cleaning the valve body and checking all the wires he thinks the transmission is shot. Apparently he doesn't rebuild Allison's, so it looks like I'll be pulling the trans and tearing into it. Thanks for all your guy's help!
  6. Z

    C1 Clutches Toast

    That is correct. No forward or reverse with the round connector unplugged from back of trans. I'm hoping it's just a stuck valve. I should find out by the end of the day.
  7. Z

    C1 Clutches Toast

    New NSBU and cleaned all grounds, still nothing. He talked to another mechanic that said one of the spool valves could be stuck in the upper valve body. He's taking it out and going to check today. I told him to make sure the trim valves had 12V also. Will post update later.
  8. Z

    C1 Clutches Toast

    Yes, you can hear a load being put on the engine when you put it in gear. I was told the line pressure is great. 120PSI at idle in park. Not sure for other gears, but he has checked.
  9. Z

    C1 Clutches Toast

    I can check it at the plug right? Terminals L & M?
  10. Z

    C1 Clutches Toast

    I went to brake torque and put it in 2nd and it shifted from 1-2, 2-1, then on the 1-2 shift it went into neutral with "Range Shift Inhibited" and I had to restart the truck to get it to move. Instantly if you gave it any acceleration at all it would rev up high and move but not as much as it...
  11. Z

    C1 Clutches Toast

    The ohms checked out to spec. I will check voltage again to make sure. Shouldn't I have forward movement though with the trans connector unplugged? The plug is leaking out of the bottom row of pins, but if you spray it out and put dielectric grease on it it doesn't change a thing.
  12. Z

    C1 Clutches Toast

    I'm starting to think my transmission is trashed. Truck has no forward or reverse movement. Whenever I unplug the connector on the back of the trans I still have no movement. My fluid is bright red and I was told by the mechanic there was clutch material in the pan, but "not enough to amount to...
  13. Z

    TCM Wires By Power Steering

    Thanks!
  14. Z

    TCM Wires By Power Steering

    I noticed some wires running by the power steering pulley that were slightly frayed. One appears to be a ground that runs down to the drivers side of the block. The other wires are purple and gray/white. Does anyone know what these three wires are exactly?
  15. Z

    New Codes!

    I'm currently limited to phone internet and things are harder to access. I'm more than willing to help other people, but I am still in the process of learning things. This is my second Duramax and I've never had transmission problems besides a bad ground on the block.
  16. Z

    New Codes!

    I replaced the ignition switch in my truck just to eliminate the possibility. It threw two codes P0841 and P2810. You can hear it clunk into gear really loud and a load is put on the engine, but still no movement. Also on the scanner it said it wasn't in any gear and the gear ratio was 0.00...
  17. Z

    Pressure Switch Module

    According to the guy, he said he's checked every connection to the transmission and the ignition switch. He said he manually tried grounding the switch for P0843 and still nothing. Line pressure is great. The truck has been serviced by GM its whole life until I got it because it was a fleet...
  18. Z

    Pressure Switch Module

    What do you think the problem is Mike? Mechanic doesn't seem to know anything.
  19. Z

    Pressure Switch Module

    Thanks guys! Got one ordered today through work. Hopefully this fixes the no movement problem I have.
  20. Z

    Pressure Switch Module

    I am looking into replace the pressure switch module on my Allison 5 speed. I went to Oreilley's and they tried selling me a PSM that only had 5 switches. It should have 6 switches right? Or 4 if it's an updated one?
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