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  1. O

    M1078 Transmission Problem

    Hi Ronmar, I'm wondering about the batteries- will need to spend some time with them at some point, as to the scope- the noise varied and I should have done a better job at logging my tests. There is something making noise with the alternator and regulator 100% out of circuit. The biggest...
  2. O

    M1078 Transmission Problem

    Thank you!
  3. O

    M1078 Transmission Problem

    News! I scoped the balanced pair at the transfer case and saw lots of noise on the line when in drive. I appeared that perhaps there was an intermittent open in the output speed sensor or associated wiring. I drained the transfer case and opened the inspection plate- inside I couldn't...
  4. O

    M1078 Transmission Problem

    Output speed sensor is around 300, it's new, Have not checked the engine speed sensor- maybe that's the problem? Also when running the TM test between the passenger side transmission speed sensor connector A&B to the connector on the xfer case 6 or 8 pin- I get no continuity, Not sure if...
  5. O

    M1078 Transmission Problem

    I changed to original oil to full synthetic Delvac 2 years ago, filters at the same time. Cracked a cooling line this summer and lost about 2 gallons or so but it never gave me trouble after and I've driven it hundreds of miles since. I did notice that it's now hanging in 3rd when down...
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    M1078 Transmission Problem

    Hi Ronmar, you must be as old as me! Divisions? Check out the digital results on the right for 12VDC- 4 volts peak to peak, that's AC on the DC- but also a min max- this is at an idle- the event may be fast and not on the display. I cleared the codes and they came back- 22-11, 25-16...
  7. O

    M1078 Transmission Problem

    Hi Ronmar- I pulled the relay earlier and took a ride, it still locked out but I then had low voltage code 13-13 son it wasn't a great test. I have 3 volts of AC on the DC, the scope was at the posts in the "glove box" I ordered a new voltage regulator hoping that's the issue but it might be...
  8. O

    M1078 Transmission Problem

    Hello Troopers! My M1078 A0 has been pretty good, 12K mi, but has developed a transmission problem. Starting out or downshifting to 2nd it will often stay in 2nd- the left range indicator blank. Shutting off the main power resets it and it will often be ok for a while. I have had codes...
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