
Shocker Gooseneck Stem & Coupler for 3" Ball for Diamond C Telescoupler 40,000 lbs - Square 4.5" Diamond C Telescoupler, Raw Steel
$459.99 CAD
$684.73 save $224.74
or as low as $39/mo with flexible financing — 4, 6, or 12 months. Options at checkout.
SKU: SL-45SQ-BLK-SL40-DC-RAW
Checking availability…
The details that matter
Product overview
Heavy-duty adjustable 4-1/2" square gooseneck stem & Shift Lock® coupler for 3" gooseneck ball for Diamond C trailers with telescoupler bolted stem pattern. Fits 5" outer stem and replaces inner 4.5" square stem with Diamond C telescoupler bolted stem pattern.
What’s included
- Includes complete replacement inner square tube gooseneck stem to replace 4-1/2" Diamond C set bolt pattern stems along with Shift Lock® gooseneck coupler for 3" gooseneck ball.
Full product description
Heavy-duty adjustable 4-1/2" square gooseneck stem & Shift Lock® coupler for 3" gooseneck ball for Diamond C trailers with telescoupler bolted stem pattern. Fits 5" outer stem and replaces inner 4.5" square stem with Diamond C telescoupler bolted stem pattern.
Features 4 threaded holes to bolt the stem into place and to set the height you need for your set up. Replace or update your gooseneck trailers coupler with the patented dual latching 40K Shift Lock gooseneck coupler for 3" ball by Shocker Hitch. This comes in raw steel, for you to paint or powder coat..
Upgrade your gooseneck trailer with the easy to use, 3" Shift Lock gooseneck coupler for gooseneck trailers. This is built heavy duty and is rated at 40,000 lbs GTW with 8,000 lbs tongue weight. The Shift Lock gooseneck coupler that captures ball on both sides. Plus, at a glance, you can see if it's locked onto the ball.
Just use the shifter handle to lock it on to the ball or to release it from the gooseneck ball. The dual latching rods are made with 3/4" diameter 1045 steel to lock the ball in place. Works great on gooseneck style trailers; dumps, equipment, flatbed, race trailers and more. Completely replaces your factory stem & gooseneck coupler. Installs in minutes.
Patent # 11,370,257 B1. Made by Shocker Hitch® USA in Jamestown, ND
All features & technical notes
Features
4-1/2" Square Gooseneck Stem for Diamond C Telescoupler with Bolted Stem Pattern Stem & Shift Lock Gooseneck Coupler for 3" Ball: Inner 4-1/2" square tube replacement with Diamond C bolted stem pattern gooseneck coupler that fits into a 5" outer stem tube on a Diamond C gooseneck trailer. Completely replaces your factory gooseneck stem & coupler.
Installs in minutes. Comes in raw steel for you to paint or powder coat. 4-1/2" Stem has 4 Threaded Bolt Holes for Adjustment & Fits 3" Gooseneck Hitch Balls: Replaces 4-1/2" square stem with Diamond C set bolt pattern. Features 4 threaded 3/4-10 holes to bolt the stem into place and to set the height you need for your set up. Bolts not included.
Includes Inner Tube Square Stem & 3" Shift Lock Gooseneck Coupler: Includes complete replacement inner square tube gooseneck stem to replace 4-1/2" Diamond C set bolt pattern stems along with Shift Lock® gooseneck coupler for 3" gooseneck ball. Patented 40K Shift Lock® Dual Latching Coupler for 3" Ball: Patented game changing design.
Dual latching design is the only gooseneck coupler that captures ball on both sides. At a glance, you can see if the coupler is locked on the ball. Easy to use handle to hook up and disconnect the coupler from the ball. Patent #'s 11,370,257 40,000 lbs GTW & 8,000 lbs Tongue Weight: Built for heavy-duty gooseneck towing to provide years of performance.
Heavy Duty Thick Walled Stem with Extra Strong Plating for Welded Stem & Coupler Connection: Stems are thick walled with additional plating for superior strength to weld 3" coupler to stem for long term strength and durability. Optional Shift Lock Gooseneck Locks: Box style coupler & set bolt lock kit is part # SH-GK30P-400GL-BLK.
Box style coupler lock is SH-GK340P-BLK. Puck style coupler lock is: SH-9000-350. Set bolt lock, part # SH-400GL-ISP-BLK available and sold separately. Optional Outer Gooseneck Square Sleeve Tube: Does not include weld on outer gooseneck square sleeve tube. They are sold separately. The Shift Lock coupler is also available on Gooseneck Surge Air Hitches.
Installation
Download installation guide (PDF)Not sure this fits your setup?
These take a minute and save a return.
$459.99 CAD
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
