70cudagone
New Member
- Joined
- Mar 3, 2019
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I have a 2007 suburban that was running at about 230-235 while towing in Smokie Mountains. Was thinking of adding a coolant additive such as wetter water, Royal Purple, etc. Just looking for any input. Trans temp was up too at about 230. I will probably install a trans cooler but ant thoughts on a full flush? Not sure if it was done before but bus has 140k miles and a 5.3L. In the "old" days I would leave fluid but not sure if that still applies. thanks for the input
