GMC Denali 2500 HD Allison transmission
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from looking at the parts for an '18 5.3 or a 6.0 burb on rockauto, it doesn't show a separate oem trans cooler like the trucks have. -
Unfortunately, it's late at night so I won't go out to look . . . and my memory might be wrong here! I *think* I used those "washers" as keepers on the back side of the holes. But I also think I had to drill them out a little because I couldn't get them on the fasteners. I remember being confused in trying to figure out how they were meant to work. After putting them all in, I also put some black sealant of some kind to glue/hold them in place as a backup. I also found some (one?) of the holes lined up behind a frame brace so I couldn't put on a washer/keeper. So that one is just sort of glued. A year and a half later it's all solid. I'll try to look tomorrow! -
I am using a ScanGauge II. A ScanGauge III is nicer but it's bigger and I couldn't figure out where I wanted to mount it. I mounted the smaller ScanGauge II where it covers the bottom part of the tach (who cares about 500 rpm most of the time?) and it covers up some idiot lights. I use it to display (actual) engine temp, engine oil temp, transmission gear (1-10), and transmission fluid temp. I checked engine oil pressure and voltage but the dash gauges were close enough (unlike engine temp), so I display the ones I listed above. L8T gasser.
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Thanks. On my suburban there are no external trans fluid lines. From what I can deduce by exploring different radiators for the 2018 suburban, there is the high capacity towing package which includes transmission fluid cooling and engine oil cooling via a single high capacity radiator. Without the high capacity towing package the radiator only cools the engine oil. Basically this is what I want to confirm. Really trying to determine if any 2018 suburban cooling system came from the factory with a cooling radiator that is external to the coolant radiator. -
Maybe look on the transmission to see if the trans cooler lines are present there, then follow them forward?
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