Zimmers 06 LLY

Discussion in '1982-Present GM Diesel' started by 76zimmer, Jan 7, 2020.

  1. 76zimmer

    76zimmer Flyin Rat Premium Member GMOTM Winner

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    Dmax did real well the whole trip to Moab...
    Even over the Eisenhower pass/tunnel over the Rockies.
    9mg avg for the trip. I got a bit concerned towing through the snow and a bit of hard packed/icy surfaces. Chain/ snow laws were in place It wants to spin the tires pretty easy on wet slippery conditions. I just kept momentum up to 40-45 and was careful w the throttle.
    a couple big rigs run off the road, so it was a bit exciting!

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  2. 76zimmer

    76zimmer Flyin Rat Premium Member GMOTM Winner

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    Return trip was much easier, although I saw a concerning rise in engine and trans temps. Engine up to 235, trans almost 230. Luckily after that climb in the Rockies, we hit a downhill descent and things cooled off. Blew a trailer tire once we got out of the Denver area, and changed the spare and noticed another looked like it was just a matter of time, so we stopped and put a new set of 12plys on it. The set that blew out had less than 2500 mi on them and were only 3-4 yrs old. They were Interco blems...10ply ST235/80/16. New set are chinese made for Cooper.... not betting any money on these ones either!
    Truck averaged about 9.5mpg for the trip... 9 going west, 10 coming east. Truck performed very well for 257k, trans braking is awesome at times, a bit concerning in the snow though. Just kicked it out of tow/haul to get better control in manual mode.
    Overall, I couldnt be happier with the performance of the Duramax/Allison

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