How Does the Built-In Tongue Weight Scale Work on the Trailer Valet TV39ZR?

Updated 08/01/2026 | Published 07/27/2026

Question:

can you tell me more about the tongue weight scale on this? is it accurate? why do you take the reading before hitching up ?

asked by: Robert T

Expert Reply:

Hi Robert, One of my favorite features of the Trailer Valet Jack, Part # TV39ZR, is the built in digital tongue weight scale because it takes the guesswork out of loading your trailer. As you raise the trailer with the jack, the screen on top displays the tongue weight in real time.

For the most accurate reading, you'll want the trailer parked on level ground with the wheels chocked, and the coupler completely supported by the jack. Once the coupler is sitting on the hitch ball, the jack is no longer carrying the full tongue weight, so that's why you take the reading before hitching up. It's a really handy feature if you tow different trailers or frequently move cargo around.

Are you planning to use it with a camper, a boat trailer, or something else?

expert reply by: Heather A