Towing

Asked by Mar 21, 2018 at 12:09 PM about the 2008 GMC Yukon

Question type: Car Customization

I have an 08 Yukon. It's has the 6.0L
hybrid motor.  I use it to pull my 32 foot
camper.  It does great except the temp
rises well above normal when going
uphill.   My question is, if I add an after
market transmission cooler will that
eliminate the high temps?

1 Answer

131,685

You need to find out if it is the transmission that causing the overheat or the engine itself. On all my rigs that IO have used for towing I put on a very big transmission cooler and bypassed the cooler in the radiator, this has dropped my transmission fluid temperature to about 145 to 165 degrees under load, around 120 normal driving, couple that with RedLine tranny fluid and you should be good to go on tranny cooling. If it is engine then the radiator is not big enough or you have flow problems. Check with you local parts store and see if aftermarket make a larger radiator that will fit your existing mountings. Flow problems could be a bad water pump, thermostat not opening fully, hoses collapsing under load. HTH

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