2004 4l80e hot trans on hills
Hi my 2004 k2500 transmission gets up to 230f on any grade locked in 3rd gear and not gear hunting. Why is it getting that hot on hills?
Forum Discussion
tekman, not sure what the power steering pump has to do with trans temp, there is no coolant circulating in the PS pump.
PA, normal temps should be 150, 175 when towing and 190-200 on a steep hill with the trailer. What I would suggest is having the cooler lines disconnected from the trans and power flushed separately to remove any debris.
Not sure about the 6.0 but on my 8.1 there are two coolers in series. the trans fluid goes from the 4L80E into the right side of the radiator, then from there into the aux cooler as pictured above, then back to the transmission. The radiator helps bring the trans fluid up to temp in winter since the coolant is hotter than the trans fluid and helps to warm it. The aux cooler on the front then helps to moderate temps.
PA, normal temps should be 150, 175 when towing and 190-200 on a steep hill with the trailer. What I would suggest is having the cooler lines disconnected from the trans and power flushed separately to remove any debris.
Not sure about the 6.0 but on my 8.1 there are two coolers in series. the trans fluid goes from the 4L80E into the right side of the radiator, then from there into the aux cooler as pictured above, then back to the transmission. The radiator helps bring the trans fluid up to temp in winter since the coolant is hotter than the trans fluid and helps to warm it. The aux cooler on the front then helps to moderate temps.
