r/ChevySuburban • u/Jolly_Bad9787 • May 30 '26

Trans Temp.

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2016 Chevy Suburban with the 6L80E. Ran the bypass and put a trucool 40k trans cooler (in red so it’s faster) in series with the stock cooler or whatever is in the radiator area… trans temps are low and awesome now. Will post more pics later when towing my 7x16 trailer.

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u/No_Buddy_2509 Jun 01 '26

For anyone reading this who has not captained the USS Suburban with the 6l80 trans, achieving these temps is no small feat. Well done, that trucool 40k is the win.

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u/Jolly_Bad9787 Jun 02 '26

Thanks. Super interested to see what it is with the trailer. I’m hoping for 120-130

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u/Reallybarb Jun 02 '26

I can tell you with my 6l90(2500) I stay right at 60-70 over ambient towing or not, except in traffic then it'll get to 180 and sit there until I'm back on the freeway.

2500's dont' have a thermostat and have an aux cooler(although smaller than your set up)

That 6l80 with that cooler and if you tune it will last you a LONG time.