Suspension Fj60 brakes. Rear coil conversion





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  1. #1
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    Default Fj60 brakes. Rear coil conversion

    Hi everyone. Im not new on the forum but this is my first new thread.

    Im Charles and im buying a fj60.

    All ready found THE One. Now I'm planning some upgrades.

    Im planning on DIY all I can.

    At this point my first consern is brakes. It's got a big 8v conversion and I feel the stopping power is not equal to the going power😁

    Is there a conversion kit available to put some LC 80 or prado discs in the rear or something like that? Anny advise welcome.

    Thank you.

  2. #2
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    Default Re: Fj60 brakes. Rear coil conversion

    Since your brake master cylinder is specific to rear drums, you need to replace that as well or install a brake bias valve.

    Secondly, 80%+ of all braking is on the front brakes.

    If you manage to install a set of 80 series rear disks with calipers I'd also look at an 80-series master cylinder and booster and then upgrade the front disks and calipers and pads.

    http://www.powerbrake.co.za/category_s/3718.htm

    But I'm no specialist on Toyotas. Grips and Petri know them well.
    2012 Jeep Sahara Unlimited 3.6 V6
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    Default Re: Fj60 brakes. Rear coil conversion

    Would better quality front and rear pads and front dis make a noticeable difference?

    Would it be better to rather upgrade the front to larger discs than to convert the rear?

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    Default Re: Fj60 brakes. Rear coil conversion

    Quote Originally Posted by 0837238277 View Post
    Would better quality front and rear pads and front dis make a noticeable difference?

    Would it be better to rather upgrade the front to larger discs than to convert the rear?
    how old is an FJ60?

    Think about how stuffed that braking system is by now.

    Do this:

    - new disks and drums
    - new pads and shoes
    - new calipers and rear slaves
    - brake fluid flush
    - new master cylinder
    - stainless reinforced flex hoses

    You'd be surprised how it can stop if the system is new...........
    2012 Jeep Sahara Unlimited 3.6 V6
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  6. #5
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    Default Re: Fj60 brakes. Rear coil conversion

    That does seem like a good idea. Will it be enough with 33" tires?

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    Default Re: Fj60 brakes. Rear coil conversion

    Sorry of it seems like simple questions. Im new to the 4x4 scene. I've read a lot but dont have actual experience.

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    Default Re: Fj60 brakes. Rear coil conversion

    Quote Originally Posted by 0837238277 View Post
    That does seem like a good idea. Will it be enough with 33" tires?
    depends how fast you want to drive

    There is unfortunately no way to circumvent basic physics: a 2 ton 4x4 @ 160km/h will take longer to stop than a lighter vehicle at the same speed.
    2012 Jeep Sahara Unlimited 3.6 V6
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    Default Re: Fj60 brakes. Rear coil conversion

    Can the vehicle currently lock up the brakes?

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    Default Re: Fj60 brakes. Rear coil conversion

    Quote Originally Posted by jelo View Post
    depends how fast you want to drive

    There is unfortunately no way to circumvent basic physics: a 2 ton 4x4 @ 160km/h will take longer to stop than a lighter vehicle at the same speed.
    My plan is simply cruising, no high-speed drag racing.

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    Default Re: Fj60 brakes. Rear coil conversion

    Quote Originally Posted by Wicd View Post
    Can the vehicle currently lock up the brakes?
    I needed to step hard to get it to stop, it did not lock up. I'll take it for a test drive again in about 2 weeks then ill try to see if it will lock up. But in my experience with the amount of force I used to brake a good working system should have locked up the wheels.

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    Default Re: Fj60 brakes. Rear coil conversion

    Quote Originally Posted by 0837238277 View Post
    I needed to step hard to get it to stop, it did not lock up. I'll take it for a test drive again in about 2 weeks then ill try to see if it will lock up. But in my experience with the amount of force I used to brake a good working system should have locked up the wheels.
    Well, then there is room for improvement. Jelo's suggestions are good. Powerbrake discs, braided hoses etc will make a difference. Also if the vehicle is lifted you will have to adjust the load sensing valve at the back to compensate.

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    Default Re: Fj60 brakes. Rear coil conversion

    Quote Originally Posted by Wicd View Post
    Well, then there is room for improvement. Jelo's suggestions are good. Powerbrake discs, braided hoses etc will make a difference. Also if the vehicle is lifted you will have to adjust the load sensing valve at the back to compensate.
    Is there a recommended way of adjusting that or do you go trail and error? 😁

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    Default Re: Fj60 brakes. Rear coil conversion

    I will be working on this car over time. What should be the first thing to check on the braking system?

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    Default Re: Fj60 brakes. Rear coil conversion

    Quote Originally Posted by 0837238277 View Post
    I will be working on this car over time. What should be the first thing to check on the braking system?
    first step:

    - drain and flush the brake fluid, replace with good quality DOT4
    - check front pads and condition of calipers and disks, repair any items
    - remove rear drums, inspect shoes, inspect drum surface, inspect slave cylinders, repair any items, replace and adjust rear shoe free play
    - check condition of front and rear flex pipes
    - check for leaks

    Then take it out again. An empty FJ60 should lock up all 4 wheels. It should brake in a straight line.

    If only the rears lock: bias valve is stuck/faulty/not adjusted, or else the master cylinder is faulty
    If only the fronts lock: check and adjust bias valve until rear wheels just start to lock up under hard braking

    If you CAN'T get the brakes to lock on a hard surface, then you'll have to inspect the booster, master cylinder and again, the flex pipes.

    As I said, I'm no expert on the FJ60, but that's what I would start with on any dodgy second hand vehicle.
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    Default Re: Fj60 brakes. Rear coil conversion

    Quote Originally Posted by 0837238277 View Post
    I will be working on this car over time. What should be the first thing to check on the braking system?
    I got an 1983 FJ60.
    It very much depends on how the brakes feel. Is there a wobble? Does it pull to one side when braking?
    If it's just requires a lot of force on the brake pedal, is it maybe that 30+ years ago more brake force was required? What do you compare it to, a modern sedan?
    Check everything, brake fluid included.
    2012 FJ Cruiser
    1983 FJ60 Landcruiser

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    Default Re: Fj60 brakes. Rear coil conversion

    Quote Originally Posted by HugoNotte View Post
    I got an 1983 FJ60.
    It very much depends on how the brakes feel. Is there a wobble? Does it pull to one side when braking?
    If it's just requires a lot of force on the brake pedal, is it maybe that 30+ years ago more brake force was required? What do you compare it to, a modern sedan?
    Check everything, brake fluid included.
    My compression is +- against the SFA hilux i had. Also with big tires. Its the closest experience i have. Is that comparable? The brakes feels to me kike something with no brake assist.

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    Default Re: Fj60 brakes. Rear coil conversion

    Quote Originally Posted by 0837238277 View Post
    My compression is +- against the SFA hilux i had. Also with big tires. Its the closest experience i have. Is that comparable? The brakes feels to me kike something with no brake assist.
    that is a good comparison, both had solid axles and leaf springs
    your description says brake booster is not working: have you checked the manifold vacuum pipe is connected and not leaking?
    2012 Jeep Sahara Unlimited 3.6 V6
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    Default Re: Fj60 brakes. Rear coil conversion

    Quote Originally Posted by jelo View Post
    that is a good comparison, both had solid axles and leaf springs
    your description says brake booster is not working: have you checked the manifold vacuum pipe is connected and not leaking?
    I do not have the vehicle yet. Im paying deposit next week and should get it by November.

    For now im gathering info. Its got a ford v8 convention in so Im hoping it is something simple like a vacuum pipe.

    Im paying 45k and its got +- 200k on the clock. So i think its a bargain even if there is some work.

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  22. #19
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    Default Re: Fj60 brakes. Rear coil conversion

    Quote Originally Posted by 0837238277 View Post
    I do not have the vehicle yet. Im paying deposit next week and should get it by November.

    For now im gathering info. Its got a ford v8 convention in so Im hoping it is something simple like a vacuum pipe.

    Im paying 45k and its got +- 200k on the clock. So i think its a bargain even if there is some work.
    OK, let's see what happens after you get it. Doing a coil conversion isn't a trivial matter.
    2012 Jeep Sahara Unlimited 3.6 V6
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    Default Re: Fj60 brakes. Rear coil conversion

    Quote Originally Posted by jelo View Post
    OK, let's see what happens after you get it. Doing a coil conversion isn't a trivial matter.
    Thanks.

    After reading your reply I just realised that my title is wrong. It shoud be "rear disc conversion" 😑sorry.

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