Shocker Shift Lock 40K Gooseneck Stem & Coupler for 3″ Ball w/ Adjustable Stem

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Product Information:

List Price: $539.99$579.99Sale Price: $287.99$314.99Free Ground Shipping*

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SKU: SL-4000-Base


Product Description

  • Completely replaces your factory inner tube stem & coupler: Installs in minutes.
  • Heavy Duty thick wall design stem: Available for 4″ or 4.5″ Square & Crank style gooseneck square stems
  • 40K Shift Lock Coupler: Patented game changing design. Dual latching, captures both sides of ball. Easy to use handle & see if it’s latched at a glance
  • 40,000 lbs towing & 6,000 lbs tongue weight capacity.
  • Fits 3″ gooseneck hitch balls.
  • Stems have 4 adjustment holes, holes are 2-3/4″ apart.
  • Includes complete replacement inner square tube gooseneck stem & Shift Lock™ coupler for 3″ ball
  • Does not include outer gooseneck tube sleeve
  • The Shift Lock coupler is also available on all Gooseneck Surge Air Hitches.  Want the shift lock coupler on an gooseneck air hitch? Check out our Gooseneck Surge Air Hitches.

40,000 lb gooseneck coupler for 3″ gooseneck ball with adjustable inner tube stem. Inner square tube replacement gooseneck stem & coupler. The Shift Lock™ gooseneck coupler by Shocker Hitch is now available with a direct replacement solid inner tube square stem with Shift Lock coupler. Upgrade your gooseneck trailer with the easy to use, patented dual latching Shift Lock coupler for gooseneck trailers.  It is rated at 40,000 lbs rated and is the only gooseneck coupler that captures ball on both sides. Plus, at a glance, you can gooseneck balls. We have a solution. Our Shift Lock Coupler is easy, fast, and safe. We use dual latching simple sliding rods made with alloy steel to lock the ball in place. Works great on gooseneck style trailers; dumps, flatbed, horse, race trailers and more. Completely replaces your factory stem & coupler with a replacement square stem & Shift Lock coupler. Installs in minutes.

The Shift Lock coupler is also available on all Gooseneck Air Hitches.

Patent # 11,370,257 B1

California Residents: Prop 65 Warning


Shift Lock Gooseneck Coupler Videos

Hooking Up Gooseneck to Trailer



The Shift Lock gooseneck coupler can literally be installed in a minute or two. Unbolt and unpin your factory stem and attached to replacement stem with the shift lock coupler. Watch the installation video below.

Shift Lock Gooseneck Coupler Installation Video



This product is back the Shocker Hitch Manufacturer Warranty and the Shocker Hitch Smooth Towing Guarantee. View our online Warranty Registration Form to register your Shocker Hitch.

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Weight / Dimensions

Weight 50 lbs
Dimensions 30 × 12 × 12 in
Select Gooseneck Inner Tube Stem Size

3-15/16" Square Straight Pin, 3-15/16" Square Top Crank, 4.5" Square Blank No Pin, 4.5" Square Diamond C, 4.5" Square Straight Pin, 4" Square Straight Pin, 4" Square Top Crank

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