I hadn't had any problems in rain with the 6x2. I was running a lot of Louisiana to Tennessee in lots of rain. When I was living in Mississippi. So I've had a good deal of experience with rain. Since moving to New Mexico. I have last year and this years winter under my belt. No Bueno, on Ice and snow unloaded.
I'm in my new truck. Plain Jane 6X4 Volvo vnl 740.
Sorry for not getting back to you sooner.