why would you want to replace your stock radiator fan and what is the difference between a puller and a pusher what is better and why any info on this would be great

2006 tj  

If you remove the OEM mechanical fan, which is belt driven off the crankshaft pulley, you remove a load off the engine. This will give you more power available to put to the ground and should improve mileage some too. The electric load on the charging circuit of a fan is fairly minimal vs. the mechanical load of the OEM fan. My '54 Willys fan runs all the time because there is no fan clutch. A more modern engine has one to "disconnect" the fan blades when not needed for cooling in an effort to improve mileage.

A pusher fan would be mounted in front of the radiator and force air through it while a puller fan would be mounted behind and draw air through. Electric fans can be controlled by a thermostat and/or an aux switch. As far as which is better, from what I've seen most are puller fans. I think that's because you will have room behind the radiator once the OEM fan is removed and it looks better with the fan out of sight.

I hope this explanation helps.  

AHHHH i get it now thanks for the info