Truck Specs · GMPP 350 Crate Motor w/ headers, manifold, HEI, Q-jet (285 HP or so) · TH350 with Mild Shift Kit, 24,000# B&M Stacked Fin Trans Cooler · 5.13’s in the D60/14B 39.5” TSL’s · Stock radiator, still have A/C condenser in front of it. · 185* Thermostat, straight water in the radiator · Water pump is a Remanufactured Unit less than 2 yrs. old. · Clutch mechanical fan, shroud still on OK, after a fun weekend, the rig was overheating badly on the way home. Would get up to 210* before I would have to shut it down a wait for it to cool to try to limp it home. The trans temp would go up after the water temp had, so I suspect it is the radiator heating up the fluid. On the trail it was fine, ran nice and cool. No problems at all. What can it be? The motor turns about 2900 on the freeway doing 65-70MPH. It never overheated (the water temp anyway) with the 4.10’s. Is the motor working harder with the 5.13 gearing? I have always has trans temp problems…not water temp problems. One friend thinks I need a big block or diesel radiator. What does the Jury of CK5.com think? Thanks!