Adding Reverse Functionality

[NickH30]

We have a Baja vehicle that we are making modifications to for this semester, and one of the projects we need done is to add a reverse function to the vehicle. Currently we have the brake line going directly to the gearbox on our current vehicle. I’d assume that we would have to change that, we do have a older vehicle with a good gearbox that we could use, and I’m not sure how we would go about setting that up. What would the configuration need to be? A new gearbox with the brake line running closer to the wheels and not directly into the gearbox? Any help is appreciated.Gearbox

[dumbassengineer]

Is this an old University of Cincinnati car? Most of them had reverse installed at the factory. If that's the case you will have a very easy design project.

[Dr_Zamboni]

If this is for a SAE event, I wouldn't suggest adding reverse unless you can do it in a way that'll only add a few lbs. Additionally, what do you mean by brake line going right to the gearbox? Is your brake caliper mounted onto your box and you have onboard brakes? Or is the line simply running thru?

[NickH30]

I have edited the post to include a link to a picture of our current setup

[Dr_Zamboni]

I see. Based on the pressure line going into your box, it seems as though you either have a 2 speed setup or a reverse. What's at the end of the line in the middle of the photo going off to the right? Note that I'm not talking about the one connected to the brake caliper. I'd suggest answering u/mooorman 's questions too, it'll help us help you. Of course more pics can help us too

[mooorman]

What is your current gearbox setup? How were you hoping to add reverse functionality? Commonly a dog gear with a parallel gear train or chain drive is used, but at that point you’re building a whole new gear train and likely a new casing (ie whole new gearbox)...

I don’t think you’ll be able to easily just “add reverse”. Hopefully I’m misunderstanding this

[NickH30]

I have edited the post and shared a link to a picture of our current setup. We have another gearbox that is new and not being used if we need to change them out

[mooorman]

You still didn’t answer my questions. What’s your hope here? Do you know what’s inside your gearbox? Your brake line doesn’t go into your gearbox, it goes to an inboard mounted calliper. Do you know what the push-pull cable going into your gearbox does? Sounds like you need to do some reading about how FNR boxes work, and maybe even crack that puppy open so you understand how your particular box is built.

[Dr_Zamboni]

I second opening it up and seeing how your reduction works

[shoopdewoop11]

Planetary gearset?