mci7 wrote:
Reference to the 4000MHR transmission, using the Detroit TranSynd oil, What would the max safe temp allowed when decending a mountain using the retarder ?
So far, have not let it go above 220F.
Many thanks
MCI7,
I would say you could let it get to 250F but only intermittently. The transmission will allow a max "converter out" temperature of 330F so 220F sump temperature is not too high. The transmission will go into the "inhibit" mode to allow better cooling once it reaches a pre-set sump temperature but I'm not sure what that point is. I'm thinking it's probably around 250F though.
