Originally Posted by Brian B-P
The 2010+ 4Runner crossmember is different, and Toyota rates it for towing the way the previous added-on hitch is rated - suitable for the full capacity of the vehicle (5000 pounds) with no mention of a WD restriction. Why would one assume that it is inadequate and needs conversion to something else - has there been some problem with them? Simply being a welded-in crossmember of the frame doesn't make it "lighter" than anything.
I have taken some photos showing the factory standard hitch for all 2016 4 Runners.
The Insert assembly is held on with 6 bolts. 2 are hidden by the bumper. Also shown is the welded connection between the crossmember and frame rail.
Using a weight bearing insert the car sagged 3.5 inches at the hitch and the front was raised .25 inches. Today I set up with the the WDH and raised the hitch 2 inches making both trailer and car level.