Question:
What is the best fit for a WD and Sway system? 2004 F 150 towing 2011 Eclipse 3 horse alum trailer 20 long weigh empty 3,680, GVW 9,990
asked by: Joanne M
Expert Reply:
When selecting a weight distribution system, you will want one that has a tongue weight capacity range that encompasses the trailer tongue weight, with the trailer loaded and ready to tow, and the weigh of any gear loaded in the tow vehicle BEHIND the rear axle. Trailer tongue weight is typically 10 to 15 percent of the gross trailer weight.
At capacity, 9,990 pounds, the tongue weight at 15 percent would be just under 1,500 pounds so I recommend an 800 to 1,500 pound system like the Strait-Line Weight Distribution w Sway Control, # RP66130.
This system also has dual-cam sway control that stops trailer sway before it starts. You would also need a shank, # RP54970, and a properly sized ball, # C40041. I have included a link to the installation details for you.
If you would rather want a friction sway control system, you can use Reese SC Weight Distribution w Sway Control, # RP66157. This system comes with the shank, so you would just need a ball, # A-90 or # C40041.
If you do not want sway control, then you can use Reese Weight Distribution, # RP66131, and you would need shank # RP54970 and a ball like # C40041.
I have included a link to our FAQ article on weight distribution and sway control for you.
expert reply by: Michael H

Products Referenced in This Question
Hitch Ball with 2" Diameter and Medium Shank, 10,000 lbs GTW - Chrome
Product Summary:
Hitch Ball
Standard Ball
10000 lbs GTW
Class IV
Chrome
Product Specs:
2-5/8 Inch Shank Length
2 Inch Diameter Ball
1-1/4 Inch Diameter Shank
Trailer Hitch Ball with 2-5/16" Diameter and Medium Shank, 30,000 lbs GTW - Machine Finish
Product Summary:
Hitch Ball
Standard Ball
30000 lbs GTW
Machine Finish
Product Specs:
2-5/8 Inch Shank Length
2-5/16 Inch Diameter Ball
1-1/4 Inch Diameter Shank
Reese Weight Dist Shank - 12-1/4" Long - 2" Drop to 6-1/2" Rise - 1,500 lbs TW
Product Summary:
Weight Distribution
Accessories
Replacement Parts
Trunnion - 6-1/2 In Rise
Round - 5-1/4 In Rise
1500 lbs TW
Product Specs:
Trunnion - 1-1/4 In Drop
Round - 2 In Drop
Shanks
Fits 2 Inch Hitch
Strait-Line Weight Distribution w Sway Control - Trunnion Bar - 15,000 lbs GTW, 1,500 lbs TW
Product Summary:
WD With Sway Control
Electric Brake Compatible
900 lbs
1000 lbs
1100 lbs
1200 lbs
1300 lbs
1400 lbs
Dual Cam
Trunnion-Style Bars
Product Specs:
Fits 2 Inch Hitch
Shank Not Included
Up to 15000 lbs GTW
Reese Weight Distribution w/out Shank - Trunnion Bar - 15,000 lbs GTW, 1,500 lbs TW
Product Summary:
WD Only
Electric Brake Compatible
900 lbs
1000 lbs
1100 lbs
1200 lbs
1300 lbs
1400 lbs
Trunnion-Style Bars
Product Specs:
Fits 2 Inch Hitch
Shank Not Included
Up to 15000 lbs GTW
Reese SC Weight Distribution w Sway Control - Trunnion - 15,000 lbs GTW, 1,500 lbs TW
Product Summary:
WD With Sway Control
Electric Brake Compatible
Surge Brake Compatible
900 lbs
1000 lbs
1100 lbs
1200 lbs
1300 lbs
1400 lbs
2-Point Friction
Trunnion-Style Bars
Product Specs:
Fits 2 Inch Hitch
Includes Shank
Up to 15000 lbs GTW
Product Page this Question was Asked From
Strait-Line Weight Distribution with Sway Control - Trunnion Bar - 10,000 lbs GTW, 800 lbs TW
Product Summary:
WD With Sway Control
Electric Brake Compatible
500 lbs
600 lbs
700 lbs
Dual Cam
Trunnion-Style Bars
Product Specs:
Fits 2 Inch Hitch
Shank Not Included
Up to 10000 lbs GTW
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