Model GRB-78 for Bulldog or Ram Brand Gooseneck Couplers
4.5 (1,234)
Sold 100+ last 30 days
20% off first order
$250.00
Color
Black
Quantity
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Quantity
1
Description
Description
Model GRB-78 will fit your Ram or Bulldog gooseneck trailer coupler. Please refer to the coupler fit image above to confirm that you have a Ram or Bulldog gooseneck coupler.
**Please note that this lock is not compatible with ...
Reviews
4.8
71 ratings
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This is my second lock purchase from Proven Industries. These locks are the toughest in the industry and are worth every penny!
R
Roderick · June 1, 2026
GRB-78
The first one fit great on my goose neck diamond c equipment trailer. Second one liked a 1/8th inch of fitting on my diamond c goose neck dump trailer so I cut a v in bottom section top back plate that hit the gooseneck cylinder and would not let the lock side go up to be able to slide lock plate on. After the v cut put on bottom plate slid on enough to go up with lock side then mated the top lock plate bottom to side plate lined holes up and good to go! Other than that love these locks. Thank y’all.
C
Chris · May 7, 2026
Amazing product
Very sturdy, perfect fit for what my gooseneck trailer, easy installation. Would highly recommend this item