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Old 10-03-2018, 09:26 PM
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Emergency cross bracket

I'm doing a rear drum brake job on my ride and I found that my emergency cable comes from the back on one side and comes from the front on the other. Now I know that the spring, on the emergency cross bracket, goes on one end and always on the primary shoe side, but is that true if the emergency cable comes from both directions? In other words do you change directions from side to side? HELP!

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Old 10-03-2018, 10:05 PM
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No there is a L & R backing plate, the cables exit (both) on the front side, towards the motor. Probably will need to pull the axle on the side that is backwards.

It's a bolt one piece so no big deal to correct.

Got to love the s h i t mechs out there building cars..

Pep
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Old 10-04-2018, 10:12 AM
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Impossible to do as they both have the mechanism at the back side with the emergency bracket running from side to side. The way you describe it I have either two left or right backing plates. Looking at both of them reveals that there is only provision for the emergency brake cable to exit front OR rear. Both backing plates are a mirror image of themselves except that one backing plate has provision at the rear and the other at the front; thee is no other way to describe it.
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Old 10-04-2018, 01:22 PM
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In the 1980s, GM used he same backing plate on both sides of the car. Cable comes out the front on one side and the back on the other.
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Old 10-04-2018, 01:28 PM
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I know that I have a GM diff, but the original question is whether the spring on the emergency bar is the same on one side and exact opposite on the other?
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Old 10-04-2018, 02:14 PM
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Quote:
Originally Posted by 27Tall T View Post
I know that I have a GM diff, but the original question is whether the spring on the emergency bar is the same on one side and exact opposite on the other?
If you are talking about the anti-rattle spring, they are also on opposite sides. The spring goes on the end away from the pivoting actuation lever that the cable connects to.
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Old 10-04-2018, 09:40 PM
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Thank you very much!!
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Old 10-05-2018, 11:10 AM
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Who'd of thunk it.......wonder what the reasoning behind that was?

Pep

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Originally Posted by joe_padavano View Post
In the 1980s, GM used he same backing plate on both sides of the car. Cable comes out the front on one side and the back on the other.
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27Tall T (10-07-2018)
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Old 10-05-2018, 01:57 PM
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Quote:
Originally Posted by joe_padavano View Post
In the 1980s, GM used he same backing plate on both sides of the car. Cable comes out the front on one side and the back on the other.
my 58 truk has an 86 trans am rearend in it, same backing plate and caliper on both sides. i assume the drum brakes were similar
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Old 10-05-2018, 03:24 PM
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Originally Posted by rip-tide View Post
Who'd of thunk it.......wonder what the reasoning behind that was?

Pep

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Simple. They only need to buy, warehouse, and install one type of plate. Only need to have one P/N in the parts network. Lower costs and no chance of installing them on he wrong sides. Symmetry is overrated.
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Old 10-05-2018, 05:22 PM
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I'm not sure I buy that, no matter the financial impact expected fizzled, cause it ain't that way today.

Mechanically makes no sense, pulling in the opposite direction on one side of a cable controlled device.

Sure glad they do not make cable controls for airplanes....


Pep

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Old 10-05-2018, 09:37 PM
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Quote:
Originally Posted by rip-tide View Post

Mechanically makes no sense, pulling in the opposite direction on one side of a cable controlled device.


Pep
The e-brake is activated by the cable pulling on a lever that pivots on one of the shoes. This presses against the cross link to pry against the other shoe. The brakes neither know nor care if that pivoting link is on the front shoe or the back shoe, since they react against each other. On the LH side, the pivoting lever is on the back shoe and the cable comes out towards the front of the car. On the RH side the pivoting lever is on the front shoe and the cable comes out towards the rear of the car. E-brakes work exactly the same on both sides. You should look at the hardware before criticizing the design. I have five GM vehicles configured this way. The e-brakes work fine.
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Old 10-06-2018, 09:16 PM
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I'm sure it works fine, leavers, and cables, same rigging of a straight up mechanical system, as in before hyd came along.

So what century are we talking about with this?

Hope I did not hurt your cars feelings being so critical

Just think one cable off the front side of each backing plate. Attached to a common fixture with a center pull.

Is more cost affective, has less points of failure or wear, and a simple design.

Pep
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Old 10-07-2018, 09:26 AM
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Quote:
Originally Posted by rip-tide View Post
Just think one cable off the front side of each backing plate. Attached to a common fixture with a center pull.

Is more cost affective, has less points of failure or wear, and a simple design.

Pep
Again, the location of where the cable comes out of the backing plate has exactly no relationship to how the center pull is connected. You can still run both cables to an equalizer bar and use a single center pull to actuate them.

Frankly, the GM equalizer design doesn't even use a center pull, it has a bracket that reacts the load from one cable into the casing from the other. On cable is much longer and runs all the way up to the e-brake pedal. Fewer parts, much simpler design, less stuff to wear out or break. When this is running to an e-brake pedal on the driver side kick panel, there is no "center pull" anyway. You appear to be very hung up on symmetry.
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