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  1. rrrr

    Transmission cooler for M939 series trucks, anyone done this ?

    The units use engine oil to heat/cool tranny fluid. Way too many connections and I can only imagine a stock cooler costing a lot more and not working as well.
  2. rrrr

    Transmission cooler for M939 series trucks, anyone done this ?

    Watch the video at 15 seconds in. I was doing this for over 5 hours straight. The mud was deep and like glue. https://www.youtube.com/watch?v=uii3H7FyIZE&feature=youtube_gdata_player
  3. rrrr

    Transmission cooler for M939 series trucks, anyone done this ?

    As I mentioned earlier the engine temp was fine and the fan actuator worked as well. The tranny cooler on these trucks just couldn't keep up with the heavy use. My engine temp stayed cool. When I get a chance, I'm going to look at the system and see how easy it would be to add it in. I was...
  4. rrrr

    Transmission cooler for M939 series trucks, anyone done this ?

    Yes the trucks have a cooler but I found under heavy load pulling my transmission heated up. Yes my transmission and cooler are fine. This was pulling trucks out of the mud all day. Frequently trucks their trailer and mud trucks on the trailer all at once. They added better coolers to the A2...
  5. rrrr

    Transmission cooler for M939 series trucks, anyone done this ?

    At a recent mudfest my M932a1 tructor tranny got warm 275 degrees (I had dex 3 in the tranny). I was doing some heavy pulling. The engine temp stayed cool and since my pulling speeds were so low the tranny never got good cooling. I did change the fluid and drop the pan and change the filter...
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