If you’ve recently purchased The Original Silent Gate for your 1967-1972 Chevy/GMC truck fleetside tailgate, we thank you for your business! Our ultimate hinge trunnion 6-piece set is made of stainless steel and Delrin, with a patent-pending design.

Install Steps

1. Remove the old trunnion bracket from each side of your tailgate.
2. Clean the flange pockets. Before installing the new stainless steel trunnions, inspect the tailgate’s female flange pockets and clean out all debris, paint buildup, dirt, and heavy rust.
3. Size up the fit. Make any adjustments needed so the trunnions fit properly. When installing the female Delrin bearing on each side, line up the flat edges front to back. You may need to tap the flange on the inside of the tailgate slightly open or closed to achieve a perfect fit.
4. Check the Delrin bearing fit. It should sit flush with the edge of the tailgate or just below flush. If it’s too tight, remove it and sand the backside (no bevel) with a grinder or sandpaper, then sand the edges to improve the fit as needed. Flat edges on each side prevent spinning.
5. Seat the beveled Delrin piece. Depending on your tailgate, the beveled Delrin piece can be installed inside the cup pocket or as shown — make sure it’s flush or just below flush with the tailgate edges.
6. Install the trunnion hinge assembly. Reattach the tailgate using your original hardware or upgrade to stainless steel, using anti-seize grease when reassembling stainless items. Have someone help hold the tailgate in place while you get the bolts started, and don’t fully tighten until you’ve confirmed a perfect fit.

Note: every tailgate has a unique history and may need additional attention or alterations to achieve a perfect fit.

View Installation Instructions