I have a 2013 xlt 4x4 5.0 with a 3.55 diff. According to the Ford 2013 RV & trailer towing guide I can have a gcwr of 13,500 and a max trailer weight of 7,700. The question is if I change both differentials to 3.73, can I follow the rv & trailer towing guide for the 3.73 differential? The weights would move to gcwr of 15,100 & max trailer weight of 9300. There are no restrictions next to either of those numbers, as far as when properly equipped, etc.

 

Subscribed. Also interested in this as well. Not only do I pull my trailer, but I have 35's as well!

 

Yes on the GCWR but ot wont change the payload, which for most trucks keeps you from hitting the max trailer weight.

 

It's no fun towing anything over 9K pounds with a F-150 for a long distance. I'd much prefer a F-250 or 350 for safety on the road.

 

It doesn't legally change it. And you're willing to spend $2k+ on just a marginal upgrade to 3.73 gears?

 

I want 4.10 gears.

 

Thanks, much appreciated.


That would have been my next step in research. Thanks.

 

The placard showing your weight limits wont change. That said, I challenge anyone to show a real world example of a ticket for exceeding those weight or insurance denied because of gently exceeding those weights.


If you only have a 7700 or so tow rating - it means you have the 5.0. Nothing bad about that, could actually be good bc the eco can give a false sense of being able to tow more bc of how it makes gobs of torque down low. Doesn't mean it would stop or handle the load better. Now that being said, your truck (but for the power plant) is the same as the eco with a 3.55 rear rated to tow almost 2k lbs more. So IMO, exceeding your tow rating by 1k lbs wouldn't bother me one bit as long as the tongue weight wouldn't be a problem with handling/suspension.

 

Yes, sorry. I do have the 5.0

 

Does anybody know what parts are required for the swap? If you have prices too, cool. I can look up the prices. Thanks