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  1. M

    Hard downshifts while in 4-lo

    Why's that?
  2. M

    Hard downshifts while in 4-lo

    Thanks for all the good input. I like the idea of being able to lock it into 2nd gear, and not allowing it to downshift into 1st unless I manually select 1st. I don't want to lose 1st gear in 4 lo, I really like the control of crawling along that the lower gearing gives me. I know absolutely...
  3. M

    Hard downshifts while in 4-lo

    It happens when I'm in second and it'll downshift to 1st. Just when going down hills. I'm not sure of the exact speeds, but I'd be surprised if I'm going much more than 5 MPH. I really think the tranny is doing what it is programmed to do, I think it's just that the gearing is so low that it...
  4. M

    Hard downshifts while in 4-lo

    I'm just crawling, under 5MPH, going up and down rough and rocky trails.
  5. M

    Hard downshifts while in 4-lo

    Hello everyone, I was directed to this forum by Jr_Explorer (I didn't see that user name in your registry). I'm normally on the Expedition Portal forum (same user name). Mike was very highly recommended. My truck is a '02 Chevy Duramax/Allison, cc/sb 4X4. I have 173,000 miles on it. When...
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