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JL8 Front Brakes

Started by 69DZM21, April 16, 2011, 07:35:35 PM

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69DZM21

Does anyone know what an original set of front JL8 brakes would be worth?  The hubs, rotors, and calipers came off a 69 Z28 that was wrecked, the calipers are siezed but the hubs and rotors are in good condition.

tmodel66

JL8 was only for the rear. The front would be just regular front disc brakes. I'd say a couple hundred but you can look on eBay and get an idea of what they cost.
Daniel  
'69 SS 350/4 speed  Fathom Green--POP

Gramps69Z

What Daniel said, if you decide to eBay them and need help let me know.

http://www.camaros.org/suspen.shtml#Brakes
Captain John Wykoff
Destin Fire:   October 31, 2015 at 0700--Officially Retired

69DZM21

The JL8 front brakes are different than regular power disc brakes, the JL8 brakes have dual piston calipers and a seperate hub assembly from the rotor don't they?

tmodel66

What year are you working on?  The disc calipers were a 4-piston design used only in 67 and 68.
The disc brakes in 1969 were redesigned to a single-piston caliper that replaced the more complicated and costly 4-piston design.



Daniel  
'69 SS 350/4 speed  Fathom Green--POP

69DZM21

I am working on a 69 Z28 which has power disc front brakes, the rotor assembly has the bearing inside the rotor and a single piston caliper.  The set of front brakes I am refering to came off a 69 Z28 that had the JL8 option and they have a seperate hub assembly from the rotor, you can remove the brake rotor without touching the bearing.

BlackoutSteve

Quote from: tmodel66 on April 16, 2011, 09:26:38 PM
JL8 was only for the rear. The front would be just regular front disc brakes. I'd say a couple hundred but you can look on eBay and get an idea of what they cost.
No, the front got larger rotors and larger 4 piston calipers.
Quote from: WYKOFF69Z on April 16, 2011, 09:30:01 PM
What Daniel said, if you decide to eBay them and need help let me know.

http://www.camaros.org/suspen.shtml#Brakes

No, JL8 was front and rear..

"The system was adapted from the Corvette J56 heavy-duty brake package and included larger front and rear rotors"

Read the link you posted!
Restoring my RHD 69 Jane in Melbourne, Australia.
http://www.usmuscle.com.au/Forum/showthread.php?t=2840


tmodel66

Oh  I forgot about the 206 units that were produced in the limited time frame. My fault and I apologize. Some things like this just slips my mind since they were so few.
Daniel  
'69 SS 350/4 speed  Fathom Green--POP

JohnZ

<<I am working on a 69 Z28 which has power disc front brakes, the rotor assembly has the bearing inside the rotor and a single piston caliper.  The set of front brakes I am refering to came off a 69 Z28 that had the JL8 option and they have a seperate hub assembly from the rotor, you can remove the brake rotor without touching the bearing.>>

Do the rotors look like the photos below, with five bolts from the back side attaching the hub to the rotor?
'69 Z/28
Fathom Green
CRG

69DZM21

No, there are no bolts holding the rotor to the hub accept the wheel stud lug nuts.  When you remove the wheel the rotor will also come off if you take off the brake caliper.

69DZM21

After looking at these pictures closer, they might be the same if the rotor will slide off the hub assembly-hard to tell from the photo.  I can not tell if the outside of the rotor is flat or if it has a lip where the hub attaches.  Are the rotors and hubs in the pictures JL8 option parts? 

mark x22

The JL8 rotor is 11.75 diameter and 1.25 thick , and the hub comes from the inside , only the studs and center hub are seen when installed. .

69DZM21

Are there replacement JL8 hub assemblies available?

mark x22

They use front drum brake hubs , with 1.75 long studs and Corvette front rotors .