2006 F150 Towing
 

Hey guys,
I tow with my 2006 f150 that has 5.4L, Auto Trans, 3.55 gear ratio, a 6" lift, 17" wheel with 35x12.5x17 m/t's. Mods I have done include a Pro comp tuner, " cat back and a AFE intake.

Looking for some more towing power without re gearing. How much more power should I expect going down to 33x12.5x17 tires?

Thank you for helping out :-)