does it work for wood?

Yes, the TCHD2L2S3BTS works for Wood.

How do you identify what full tension is on the springs? How many turns? What's the best way to identify this?

No idea, what I did was to set the tension, by trial and error, so that the door won't close too slow, to allow pets to run out or too fast to prevent door slamming and breaking other parts

I have a double trex aluminum gate attaching to 4x4 posts covered with trex vinyl post. Will these hinges work for my setup?

A more appropriate hinge would be the TCHD2L2S3. The TCHD2L2S3 has wider leafs so that the screws are spaced farther apart to reduce stress on the vinyl to prevent the stress pulling the screws out. This hinge can work if the aluminum is sheathed very snuggly by the vinyl, but you'd need to be able to confirm that before going with this model of hinge.

Tchd1l2s3bts shows mounting holes in the picture, however the diagram shows 3 mounting holes. which one is correct? this is a soft close?

There are 3 mounting holes on each side. The soft close depends on how you set the spring tension.

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D&D Technologies TruClose TCHD1AL2S3BTS Heavy Duty Gate Hinge, Self-Closes Gates Up to 154 lb, Tension Adjustable, for Larger Square Post Metal Gates

D&D Technologies TruClose TCHD1AL2S3BTS Heavy Duty Gate Hinge, Self-Closes Gates Up to 154 lb, Tension Adjustable, for Larger Square Post Metal Gates

Product ID: 513350783

Details

Material
Stainless
Brand
D&D
Finish type
Stainless
Mounting type
Door Mount
Hole count
4
Weight limit
66 Pounds

🔧Tension adjustable for perfect close

⚙️Supports gates up to 154 lb

🛡️Lifetime warranty & rust-proof

Description

🚪 Close the gate on worries with TruClose’s unstoppable strength and style!

HEAVY DUTY STRENGTH - Engineered for gates up to 154 lbs—built to last and handle the toughest traffic.
SLEEK CLEAN FINISH - Trim covers hide fasteners for a modern, seamless look that complements any gate style.
RUST FREE DURABILITY - Industrial polymer & stainless steel combo means zero rust, UV resistance, and self-lubrication.
TRUSTED SAFETY LEADER - Backed by a lifetime warranty and ISO 9001 quality assurance—join millions who trust TruClose.
PRECISION SELF CLOSING - Adjust tension easily to control closing speed and ensure secure gate shut every time.

The D&D Technologies TruClose TCHD1AL2S3BTS is a heavy-duty, self-closing gate hinge designed for metal gates up to 154 lbs. Featuring adjustable tension, rust-proof industrial polymer and stainless steel construction, and a sleek design with hidden fasteners, it offers reliable, maintenance-free performance backed by a lifetime warranty and ISO 9001 certified quality.

Specifications

Manufacturer	D&D Technologies
Part Number	TCHD1AL2S3BTS
Product Dimensions	12.07 x 8.89 x 5.08 cm; 685 g
Item model number	TCHD1AL2S3BTS
Colour	Black
Finish	Stainless Steel
Material	Stainless steel
Number of Pieces	2
Maximum weight capacity	66 Pounds
Number Of Holes	4
Plug profile	Door Mount
Batteries included?	No
Batteries Required?	No
Item Weight	685 g

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