F-250/6R140 Mercon LV Operating Temperature

[reconstyle]

I have a 2015 F250 with the 6R140 transmissionmission. I recently had to replace a faulty valve body and went with one from RevMax. Prior to changing the valve body my transmission temps were always in the 180-200f range, sometimes slightly over 200 when towing. Now, with the RevMax valve body, the highest I have seen the transmission temp is 126f. I don't really know much about A/T's, but it seems like this valve body just always allows fluid to the transmission cooler and isn't thermostatic.

My question is, does this pose a problem as far at the operating temperature of the fluid? Would the viscosity difference between 126f and 190f be different enough that it's not able to function properly?

Obviously I know cooler is generally better, but to what extent? Ford could have done this from factory I would think, so I'm just wondering if it's ok.

 

[clinebarger]

It has a Bypass Blocker Valve installed, Common on just about all aftermarket prepped valve bodies. Shouldn't cause any shifting concerns.

 

[D60]

My question is, does this pose a problem as far at the operating temperature of the fluid? Would the viscosity difference between 126f and 190f be different enough that it's not able to function properly?

Obviously I know cooler is generally better, but to what extent? Ford could have done this from factory I would think, so I'm just wondering if it's ok.

If it's presently working fine, you've got your answer

What were your symptoms with the old vb? Just curious what failure looks like in these