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Technical 49 Chevy truck brakes

Discussion in 'Traditional Customs' started by WrkinprgrSS, Sep 6, 2023.

  1. WrkinprgrSS
    Joined: Jun 19, 2023
    Posts: 18

    WrkinprgrSS
    Member
    from Salem, VA

    So, I started working on the brakes on my 49 chevy 5 window that I picked up the end of June. I pulled the left front drum and there was nothing inside but the retaining spring for the top of the shoes (the other 3 wheels are complete). I have a line on a complete set of front brakes from a 50 car and I am trying to verify if they will work. Everytime I search I just come up with people talking about switching to 51-54 bendix style brakes. Right now I'm just trying to get the truck functional.
     
  2. squirrel
    Joined: Sep 23, 2004
    Posts: 59,197

    squirrel
    Member

  3. WrkinprgrSS
    Joined: Jun 19, 2023
    Posts: 18

    WrkinprgrSS
    Member
    from Salem, VA

    I did look at that and they have different part numbers. I am not sure if they will interchange or not.
     
  4. squirrel
    Joined: Sep 23, 2004
    Posts: 59,197

    squirrel
    Member

    If it uses different part numbers, then it's not going to interchange, is it?

    did you make sure you understand the model designations? they're confusing.
     
  5. Mr48chev
    Joined: Dec 28, 2007
    Posts: 35,552

    Mr48chev
    ALLIANCE MEMBER

    I've always used 53/54 but was able to find them. Using the Rock Auto cheat sheet I found out that 50 cars still use the Huck brakes This being 50 Fleetline. I checked Chevs of the 40's and confirmed that. 50 Chebby no workie.

    51/54 Cars use the same wheel cylinders and brake shoes.

    My and now your Chevy brake education for the days is that the break between Huck and Bendix is 1950= Huck, 1951 = Bendix for both cars and trucks. I knew it was that way on trucks but wasn't sure about 49 and 50 cars .

    Remember that the car brakes are 5 on 4-3/4 rather than 6 lug. The 51/54 swap to truck spindles is easy but you have to drill two new holes in the backing plates to match the truck spindles and you have to make spacers to go between the backing plate and the spindle. I don't have a good photo of my backing plates and spindles to show that though. I just use the spindle as a drill guide to get the holes in the right spots. Screenshot (28).png Screenshot (29).png Screenshot (30).png Screenshot (31).png Screenshot (32).png
     
    leon bee and Budget36 like this.
  6. WrkinprgrSS
    Joined: Jun 19, 2023
    Posts: 18

    WrkinprgrSS
    Member
    from Salem, VA

    Sorry I didn't realize I left it out, but the wheel cylinder is there along with the upper retaining spring. The parts I really need that don't seem to be available aftermarket are what I have circled. That's what I was hoping would interchange. Brakes.gif
     
  7. WrkinprgrSS
    Joined: Jun 19, 2023
    Posts: 18

    WrkinprgrSS
    Member
    from Salem, VA

    I'm still trying to figure that part out.
     
    leon bee likes this.
  8. squirrel
    Joined: Sep 23, 2004
    Posts: 59,197

    squirrel
    Member

    GJ, GK, and GP are what you'd be looking at, if the GJ and GK are the same as GP, then you can use the car part on a 1/2 ton truck. The parts book calls the GJ and GK "PASS", and the GP is "1/2 Ton"

    5.036 Link (4 different parts) looks the same for 1936-1950 cars and trucks.
    5.075 Anchor Plate is the same on 36-48 Cars, and 36-50 Trucks. So you'd need to find an earlier car or truck to get that from, the 50 car won't work.

    I think the pins will interchange.

    Does that help?
     
    Budget36 likes this.
  9. Budget36
    Joined: Nov 29, 2014
    Posts: 15,024

    Budget36
    Member

    Have you called places like Chevys of the 40’s, etc, told them what you have and what you need?
    IT’s usually easier to talk to folks that deal with stuff on a weekly basis then try to figure it out on our own.
    Well, at least for me anyways;)
     
  10. squirrel
    Joined: Sep 23, 2004
    Posts: 59,197

    squirrel
    Member

    heh...I find the exact opposite. I do my research, then if I know a store has what I need, I buy it.

    And none of those parts would be reproduced, so you're looking for used parts no matter what.
     
  11. Same brakes as the 46-48 Sedans, Olds use them too.
     
  12. WrkinprgrSS
    Joined: Jun 19, 2023
    Posts: 18

    WrkinprgrSS
    Member
    from Salem, VA

    Yes, that helps greatly. I will keep searching.
     

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