My temp gauge gets to the red area after running the car for about 1 min or so. I HAVE changed thermo, sending unit, fans work appropriately when ac is on or off, put new cluster in last week, still no change. If you have any tips.....shoot..

 

Do Not Rely on Stock Temp Gauge for accuracy. Make sure your car is actually running hot BEFORE trying to fix it.
test it properly first..

That being said.. sounds like you have fixed all the normal problems...

Please check the temp by another source, then get back with us and we will go from there.

Brian B