Compatibility of Resse Shank 54970 With Trunnion Bars 54946 and Hitch Head With Patent 5375867

Updated 08/06/2025 | Published 09/07/2023

Products Featured in This Question

Replacement Trunnion Spring Bar for Reese Weight Distribution System - 1,200 lbs TW

(91)

$183.61

Question:

Replacing head and shank that is missing from my 12,000 lb. WDC . Picked up shank and head used but not sure if it will work with my bars I have a 54970 shank, and 54946 trunnion bars, can not find P/N on head just a PAT.Pending no. 5375867. Can someone help me figure this all out .

asked by: Ronald M

Expert Reply:

I was able to find a document with Reese which shows the Head # RP58167 having the PAT Pending NO. 5375867. This is compatible with the Shank # RP54970 you found. As for the trunnion bars, the part 54946 relates to the end of the trunnion bar that would mount inside the hitch but for 1,500lb bars. Since you mentioned 12,000lbs that would use the Trunnion Spring Bar # RP66009

expert reply by: Bud M

Chuck

8/6/2025

Bud, Like Ronald I have the 54946 trunnion bar and head with patent number 5375867. I upgraded the shank to 54977 when Ford went with the larger receiver. I'm looking for another trunnion bar and can't seem to find 54946. I did find one that looks like the 54946: 58358. I have a couple of questions. As an FYI, I needed to permanently mount the lift brackets (6637) to my trailer so the length if the trunnion bar needs to be the same as 54946. Is 58358 a replacement for 54946? I'm wondering if 2 66009's will work? Will either of the Curt trunnion bars (17336 or 17337) work as a replacement? Thanks!!

Jesse M.

8/6/2025

@Chuck Hey Chuck. Based on my research, the 58358 would be a suitable replacement for the 54946. We no longer carry the 58358. We sold our last one about 8 years ago. I do not show the 66009 or the Curt bars as being compatible with what you have. Honestly, due to the age of your WD system I would probably recommend getting a whole new WD system.