Lioncourt

I'm reading temp out of the trans so 180 out seems pretty good. will probably add the stock back in once i get some free time

so is 180 a good max target? the tunnel is still pretty hot at that point

That one is identical to the B&M I have. Did you run in series with the stock or did you bypass the stock? What is a good temp range for these trucks?

Anyone put 2 new coolers in line while cutting out the old one? I added a cooler and ditched the stock but under moderate highway conditions i'm still reaching 180 deg. wondering if i can piggyback another. I could go bigger but it would start to interfere with the grill I think. The new cooler is a B&M @ 13,000 BTU