UR opinion, extra transmission cooler..
I pulled the grill on my (5.3 Liter, 4L60e transmission) Suburban to install an oil cooler and there's a factory oil cooler mounted behind the grill already. I traced the line from the return side of...
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falconbrother wrote:kevden wrote:
I am towing at or over the rating of our Yukon, so I added a cooler in line with the factory cooler to help keep the transmission temp down. To mount them, I bolted strips of aluminum in front of the radiator one at the top one at the bottom. Moved the oem cooler to the passenger side and mounted the new one on the drivers side. The new one has an electric fan that I wired to an adjustable thermostat. I can definitely see lower temps when adjusting the thermostat down.
The engine oil goes through the drivers side of the radiator, I have though about putting a cooler on that line as well.
If you don't already have one, you should get a guage to monitor the trans temp. A scan tool would work, or a tuner with a display (Bully Dog, Diablosport, Edge)
Also, from what I have read online, the overdrive gear in the 4L60 should not be used when towing. Wish I had learned that before killing one lol.
Doesn't the "tow/haul" feature keep the transmission out of overdrive?
Not on my 2003 Yukon 2500. Didn't on my 2005 Avalanche 1500 either. It only holds the gear longer and firms the shift.
