Author Topic: JL8 Front Brakes (Read 12219 times)

69DZM21 · « **on:** April 17, 2011, 12:35:35 AM »

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 · « **Reply #1 on:** April 17, 2011, 02:26:38 AM »

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.

Gramps69Z · « **Reply #2 on:** April 17, 2011, 02:30:01 AM »

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

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

69DZM21 · « **Reply #3 on:** April 17, 2011, 03:24:49 AM »

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 · « **Reply #4 on:** April 17, 2011, 03:56:22 AM »

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.

69DZM21 · « **Reply #5 on:** April 17, 2011, 04:09:57 AM »

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 · « **Reply #6 on:** April 17, 2011, 04:13:44 AM »

Quote from: tmodel66 on April 17, 2011, 02:26:38 AM

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 17, 2011, 02:30:01 AM

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!

BlackoutSteve · « **Reply #7 on:** April 17, 2011, 04:18:30 AM »

http://www.heartbeatcity.com/store/product/12207/Camaro-Brake-calipers--JL-8-front--pr--69/

tmodel66 · « **Reply #8 on:** April 17, 2011, 01:48:25 PM »

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.

JohnZ · « **Reply #9 on:** April 17, 2011, 05:20:13 PM »

<<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?

69DZM21 · « **Reply #10 on:** April 17, 2011, 06:31:17 PM »

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 · « **Reply #11 on:** April 18, 2011, 02:07:31 PM »

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 · « **Reply #12 on:** April 18, 2011, 09:44:35 PM »

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 · « **Reply #13 on:** April 18, 2011, 10:13:03 PM »

Are there replacement JL8 hub assemblies available?

mark x22 · « **Reply #14 on:** April 18, 2011, 10:19:49 PM »

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

tom · « **Reply #15 on:** April 19, 2011, 04:43:22 AM »

would different calipers be needed to use these rotors in a disk brake upgrade?

69DZM21 · « **Reply #16 on:** April 19, 2011, 07:47:32 PM »

Would the front spidles on a JL8 car be different than the spindles on a car with power disc brakes. I noticed in a Classic Industries parts book that the part numbers are different for drum brake and disc brake spindles. If the JL8 hubs are the same as drum brake hubs, do the spindles need to be replaced aslo, or will the original spindles for power disc brakes work ok if the JL8 brake hardware was to be used?

mark x22 · « **Reply #17 on:** April 19, 2011, 09:41:02 PM »

Jl8 uses disc brake spindles . You can use Jl8 or Corvette front calipers .

red69 · « **Reply #18 on:** April 20, 2011, 02:38:23 PM »

I did this changeover in the mid 70's. Took everything off of the JL-8 car down to the spindles. The front brake lines were different also, took them all the way back to the master cyl.

69DZM21 · « **Reply #19 on:** April 20, 2011, 03:27:54 PM »

Thanks for the info, it appears to be exactly what was done to my car. There is a small piece of brake line that had to be modified for the JL8 brakes to be used. My father-in-law took JL8 front brakes off his wrecked Z28 and put them on the Z28 I am restoring.

red69 · « **Reply #20 on:** April 21, 2011, 02:31:47 PM »

Did he change the rearend also?

Quote from: 69DZM21 on April 20, 2011, 03:27:54 PM

Thanks for the info, it appears to be exactly what was done to my car. There is a small piece of brake line that had to be modified for the JL8 brakes to be used. My father-in-law took JL8 front brakes off his wrecked Z28 and put them on the Z28 I am restoring.

69DZM21 · « **Reply #21 on:** April 21, 2011, 03:36:49 PM »

The rear end has not been changed, it is the original. He thought about changing the rear end but he did not, the JL8 rear end is MIA. I know where it was last stored but I can not find it, though the search continues.

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Author Topic: JL8 Front Brakes (Read 12219 times)