Thanks Mike for the AWESOME COOLING FANS! I was picking up in Phoenix the other day, as you can see it was 110, pulling a trailer , up the grade heading back home to Sedona. Made me feel good, I did not have to worry about the temp.
What are you pulling? How much weight?
I have towed a 19ft 5000lb Airstream all over the country in the hot summer months up the biggest western passes and have NEVER seen my gauge go that high.
The dash gauge is a glorified idiot light. It only moves off 210 when the temps are REALLY climbing. You might want to download the "Torque" app for your phone and use an OBDII bluetooth adapter to get the ACTUAL temperature.
On my truck while towing up a mountain grade, the highest temps I have ever encountered was an actual 238 degrees (read from the OBD port) while the dash gauge stayed literally about 1/64" to the right of the center 210 mark. I would NEVER have thought I was running almost 240 when the dash gauge showed just a tiny hair over 210.
Again...at just below 240 degrees actual temperature
the dash gauge barely moves from 210.
With the dash gauge as high as yours was, you reeeeeeaaaaaalllly might want to check to see your actual temperature by downloading that "Torque" app (it's free) and getting a $15 OBDII adapter.
I'd be shocked to see if your actual temp from the OBD port was actually anywhere near 230 as shown on your dash gauge in that pic. In my last 10+ years of towing with my truck, I've NEVER seen the dash gauge go that high.
I'm not saying it's not possible to go that high, I'm just saying that when the dash gauge goes that high the actual temperature is probably MUCH higher.
I also have a 2006 6 speed and have Mike's aux fan as well as (at Mike's recommendation) dual Spal fans which run at full speed when they kick on; I also have a manual override switch and leave all 3 fans on at full speed ALL the time regardless of the speed I'm driving when I'm towing. I also have Mike's Ron Davis radiator. It seems to work as again I've NEVER had that dash gauge move more than 1/64 of an inch to the right of 210...and when it does, I'm already in the 217-228 range. Even when it got to 238, the dash gauge didn't go any higher...so again, when yours is as high as your pic, it's most definitely well over 240.
Just my .06