164-175 normal driving. I see as high as 185 beating the snot out of it, running stock trans with Spartan TCM and Spartan 300 as my DD for about last 2 wks.
I've compared the oem and worked TCM's head to head, the oem runs about 5-10 degrees hotter consistently over the Spartan tcm running the same hp tune. So yeah the Suncoast tranny's mentioned before should run much cooler. They have the HD internals but lets face it, the quicker shifts and higher clutch holding power even in static state is what's keeping the temps down. I'll go Suncoast when stock trans goes (if ever), I can't believe how well both my stock trans and converter are holding up. 60k running race tunes majority of time. 5r110w ftw.