Shocker 40K Square Gooseneck Stem & Coupler for 3" Ball - 40,000 lbs - Square 4.5" Straight Pin, Black – Square 4.5″ Straight Pin, Black
$597.58
$767.73 save $170.15
or as low as $50/mo with flexible financing — 4, 6, or 12 months. Options at checkout.
40K Shift Lock Dual Latching Coupler
Patented game changing design. Dual latching, captures both sides of ball. Easy to use handle & see if it’s latched at a glance.
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.
Stems have 4 Adjustment Holes
Holes are 2-3/4″ apart. (Adjustment Holes Doesn’t apply to Top Crank Stem or Diamond C Set Bolt Stem)
Inner Tube Stem & Coupler
Includes complete replacement inner square tube gooseneck stem & Shift Lock® coupler for 3″ ball
Stop destroying your trailer and cargo.
Every bump, pothole, and expansion joint sends a violent jolt through your trailer frame, damaging cargo and wearing out your truck. Shocker Air Ride Hitches absorb that punishment at the coupling, before it reaches your trailer.
Heavy-duty 40,000 lb square gooseneck stem coupler for 3" gooseneck ball with adjustable inner tube stem. Inner square tube replacement gooseneck stem & coupler. Replacement square stem & coupler for gooseneck trailers. The Shift Lock® gooseneck coupler by Shocker Hitch is now available with a direct replacement 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. Patent # 11,370,257 B1 California Residents: Prop 65 Warning
- 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 Dual Latching 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 & 8,000 lbs tongue weight capacity.
- Fits 3″ gooseneck hitch balls: Used on 3″ gooseneck hitch balls.
- Stems have 4 Adjustment Holes: Holes are 2-3/4″ apart. (Adjustment Holes Doesn’t apply to Top Crank Stem or Diamond C Set Bolt Stem)
- Inner Tube Stem & Coupler: Includes complete replacement inner square tube gooseneck stem & Shift Lock® coupler for 3″ ball
- Does not include outer gooseneck tube sleeve sold separately.
- 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.
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$597.58
Still researching?
Skip the product wall — these are the four guides every buyer actually opens before they decide.
Installation Guide
Step-by-step videos for every Shocker family. What's in the box, what tools you need, and how long it takes.
Watch the installAir Pressure Setup
How to dial in air pressure by trailer weight so the ride is right the first time and the hitch lasts longer.
See psi by loadTowing Capacity Guide
Match GTW, tongue weight, and receiver size to your truck class so you don't over- or under-buy.
Read the guideConfigure Your Hitch
60-second fit quiz — answer a few questions about your truck and trailer, get a tailored recommendation.
Start the quiz
- 1-Year Manufacturer Warranty
- 60-Day Returns
- 20,000+ Customers
- Ships from Canada