My 2000 blazer has the trans and oil cooler integrated in the radiator. Since I pull a horse trailer regularly at the upper end of tow rating (does a good job actually) would I benifit from a extra trans cooler and engine oil cooler? Should I bypass radiator altogether or slice the new cooler lines into one of the trans lines (which one)? The lines would be flared properly of course. That would be easy, however, how would I plumb the engine oil cooler? Please tell me the factory remote filter/cooler does a good enough job as I have had the oil lines going to the remote oil filter/cooler replaced twice already and I only have 92000 on the blazer since new. Maybe an add on electric fan would help keep it cool on hot days. I have one NIB in my garage.

 

Under the towing conditions you mention, I would install an aftermarket transmission cooler. Look down below under 'Related Threads' and read those threads for more information.

 

Ok I bought a heavy duty cooler, fittings and I'm ready to go. What's the best location? The cooler manual says for max cooling put it infront of the condensor. Would I lose much if I put it in front of the rad? I also plan to put on a electric fan. Ill mount this behind rad in front of the mechanical fan I think there is enough room. I need about two inches of space and I'd like at least an inch or two clearance.