think it would be a neat lil thing, so you could change the d/h series upfit's and the t series reverse alarm to something like this there even is a tom scout video on it its quite easy to get the raw sound, just white noise after all, your local audio software might be able to generate one fresh this could serve as the_little_things.jpg
I search for aout a month and never found anything, being bored and i don't know how to mods sounds i just replaced it by the Nos discharging sound (the one you hear when arming the nos) result is the same pff pff pff but without space so its alway pfffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff like i was dropping the airbag... At the end its not the best sound to have but the current sound destroys my head as I have to hear it so then os is more relaxing... I know that not gonna help you but in case you need something for the moment, maybe just doing a loop with the nos sound so its more sound like what you need !
https://www.beamng.com/threads/reverse-white-noise-1-0.100010/#post-1753436 here it is ! D-series, H-series, Roamer maybe more since its the line pickup_reversewarn for all of the 3rd i named maybe more car have the same name
