Emailed

 

That looks GREAT!

 

I'll be attempting to put on BBU's parking brake assembly for my 4th gen 10-bolt rear in the next couple weeks. I figured it was best to keep in line with NC state law regarding safety inspection and so that's why I'm going forward with this.
$585+shipping for the entire L&R assembly including adapter plates, spacers, backing plates, shoes and hardware but minus the cables. I sent in my original spindles that I had kept left over from the front conversion, so I got $100 credit there and I'm swapping out my rear brackets(w/o PB) and Scott is crediting me $80 for shipping those back. So I'm doing this for ~$420 + $40 for 2 cables I'll get.
Here's some pics Scott sent:
More pics to come after I get the parts...

 

Ordered BBU's Parking Brake Assembly for my 4th gen 10 bolt diff...

Also, I ordered a Eaton TrueTrac differential carrier. I'll be retaining the 3.23 ring and pinion gears. Hopefully this will solve a problem Ive been having with the rear rotors rubbing against the stationary corvette calipers. Currently I have a worn out OEM Auburn diff carrier from a 2002 Camaro SS and I'd estimate axle endplay at .090", if not more.

Attacking 2 birds with one stone on this final phase of this particular project.

Will have many pics of what I currently have. Also, then new parts and assembly. I'd like to try to shoot a video too, after completion.

 

The Eaton TrueTrac was a breeze to install, so was BBU's parking brake assembly!
Took me about 4hrs to complete both installations...
Spent a good part of the morning tracking down the diff carrier side bearings and races from 3 different local parts houses.
Also, tried to get the parking brake cables locally but ain't happening, will have to order them.

Some pics I took today of the old install (without parking brake assembly) and the tight clearance between left & right caliper(s) and rotor(s) and some rubbing issues between the rear rotors and calipers with the original Auburn posi unit that was in this 2002 4th gen differential.

 

Here you can see the result of the rotors rubbing the calipers. Visually it's not too bad, but hearing the scraping at low speeds during cornering was annoying as hell, and I knew damage was being done. Focus on the bottom bolt holes of each caliper. After research done here on TGO, I decided on a TrueTrac carrier to eliminate this rubbing issue.

 

Here is the old Auburn diff carrier unit much like it was when I had to 'extract' the pinion shaft lock bolt many posts ago when I first installed the adapter plates for the 2015 Corvette Base Calipers.
No more worrying about this lock bolt breaking in the TrueTrac unit, it's not part of the design...

 

New TrueTrac diff carrier installed. Very easy. No shims, just press on the differential side bearings and hammer the carrier unit into axle with a rubber mallet. Tight fit, ring and pinion backlash seemed just a tad tighter that the Auburn unit which I would have expected...
Red grease not such a good gear mesh indicator. I'll see if there's any noise when driving.

 

Pre-assembled parking brake assemblies from BBU:

 

BBU Parking Brake Assemblies inital mount:

 

Had to remove ABS reluctor rings from 2002 Camaro SS axles due to interference shown here:

 

Few more shots before driving!
2 Parking brake cables are on order...

 

that's sooo purrrdy!

 

Ok, I drove it from the shop back home and the rotor-caliper grinding was gone as far as I could tell.

What I can say is that after installing the TrueTrac carrier and yanking on the axles to manually test for endplay it almost felt worse than the worn auburn carrier. I needed a dial caliper to confirm, but seriously yanking on an axle ain't like driving...

What I can also say is after backing out of the shop after installing the Eaton TrueTrac carrier, I was expecting the rubbing when doing a tight turn. I was surprised, no grinding during any turns!

As a test, I plan to bring the IROC back to the shop, remove the calipers and spray paint a thin coat of black paint where rubbing was evident on the calipers. Then re-drive and re-inspect.

 

Wow awesome.

 

Went to the shop this morning to install the parking brake cables and to check out the persistent rubbing issue. Apparently, due to the axle endplay, the rotors are still slightly contacting the calipers near the mounting area. It is odd, with the Eaton Truetrac contact is slightly audible during stopping in a straight line whereas with the Auburn carrier contact was very audible during slow, tight turns. Still working on it! Took off a tad bit more metal this morning, and repainted black in order to re-inspect. These pics are before taking more metal off.

 

I first installed the PB cables into the original brackets on the body then routed them through the guides which are present on the 2002 rear diff cover. They would not reach the brackets BBU had fab'd, but they did barely make it to the 2002 OEM brackets mounted on the LCA's, after slight mod to the driver's side guide. Also shown are both cables mounted to the parking brake equalizer...

Interesting story with the equalizer regarding swapping out the OEM diff with the 2002 Camaro SS diff: I had installed an adjustable panhard bar at the same time swapping out the old diff with the new, also had to lose the OEM brake cables since they couldn't fit. But ever since then, whenever the car went of a bump, I would hear a 'ting, ting, ting'. I highly suspected the panhard bar, BUT today after installing these PB cables I FINALLY saw what was happening. The PB equalizer was bouncing off of the driveshaft since it wasn't hooked up! No damage done, but I could see the wear on the drive shaft where it was intermittently touching making the 'ting' sound. No damage done and noise gone now!

 

Incoming angle of left and right PB cables. The PB cables wouldn't reach BBU's PB bracket which is still present in these pics. Situation is workable... PB is currently disengaged.

 

After everything was installed and adjuster nut just snugged at the equalizer I did a test pull on the parking brake handle. Came all the way up, did not stop the rear rotors. At this point I removed the rear rotors and adjusted the PB shoes out to barely touch the inside of the 2015 Corvette rotors. Pic is from passenger side only. It's adjusted out quite a bit with all new parts but the PB handle finally engaged the rotors and was able to keep the IROC from moving forward in drive at idle.

 

Final pics of L & R PB cable(s) to PB shoe assemblies. Inactive.

 

Final pics of L & R PB cable(s) to PB shoe assemblies. Active... One more adjustment was necessary to the equalizer after final install.

 

Awesome!

If the stock length rear axle was in there as opposed to the 4th gen length, do you think the park brake cables and mounts provided would have worked as delivered?

 

I think it might, but would still be a tight fit. I'm using cables from a 1992 Camaro 1434mm length. The cable length itself was good, the conduit surrounding the cable was short. I don't know if the 1460mm length cables from the 1992 Camaro would work better for 4th Gen diff's...

 

Finally no more rotor rubbing! I highly recommend this brake setup.
A few more pics... This should finish this thread. I painted the grey 'non-contact' areas on the C15 rotors black.

 

Looks Great!

 

Great thread I'm doing the exact same thing you are doing in the rear and I will be using this to guide me with the install. I ordered the cables from Scott at BBU, he's great guy and very helpful.

 

Feel free to continue posting here if you're using 2015/2014 Corvette parts. I'll be glad to help if I can.

 

I'm actually doing the brake swap from a 2014 1LE. Have you experienced any knock back on the rears? Any suggestions? On LS1 tech this issue keeps popping up when I look up rear brembo swaps. I'm thinking of using a 10lb Residual pressure valve to try and prevent knock back.

 

Check out post #64 and on.

 

I'm getting back into the 2015 Corvette base caliper brake setup. Scott over @bigbrakeupgrade.com has discovered awhile ago that he could fit the Z51 drilled and slotted rotors when using the 4-piston JL9 base calipers, with the slightest bit of grinding on the caliper edges. His post is HERE. So anyway, I've ordered the front and rear Z51 rotors and will try installing them this upcoming Sunday.

 

Starting off with 2 pics to get this going. Current car, although unwashed for last 3 years and directional Z51 rotor part#'s.

 

Starting with the rear. Just a simple swap! Rotor thickness is the same and it fits right over parking brake shoes. For some reason I was expecting slightly larger O.D. rotors. .1"?

 

The front will have to wait until I receive some new adapters from Scott @BigBrakeUpgrade to bring the JL9 calipers outward.Hopefully next Sunday I can dive right back in!
Here's a couple pics with the original JL9 bracket and Z51 rotor on the passenger side front and why it won't work.

 

The rears are installed as you can see in the last pic.

 

Got in the 2 brackets, including 4 mounting bolts and 4 caliper mounting bolts all 10.9 grade steel, from Scott this past Tuesday. 2 day shipping,Thanks!
These brackets were thicker than the old original brackets,very nice quality parts. They were a solid 3/8" thick and cleared the calipers nicely although there was the slightest contact between the OD of the rotor and caliper as has been mentioned before.
The old bracket had a bolt mounted at the front, which was removed when I took the pic. I drilled the threads out of the spindle with a 1/2" drill bit in order to mount the bolts from the rear. I asked Scott to thread the bracket for this purpose.
Since the new brackets were thicker, the mounting position of the caliper was slightly outward I had to adjust the shims behind the hub. After a couple trials on the passenger side, the rotor was finally centered in the caliper. Driver's side went much quicker since I knew to remove .120" worth of shims.

 

After centering the rotors, just a slight bit metal had to be removed from the calipers. I removed about .030" from the top and bottom of each caliper and I only went in about 1/2".

The first 2 pics show the slightest interference. The last 2 pics show the clearance




.

 

So, in the end this was definitely a worthy upgrade from BBU! I did it more for the looks than performance as the 2015 corvette base brakes were already stopping me on a dime, but these new Z51 drilled and slotted rotors look slick and the front looks more full. The front calipers are now about 1/2" away from the 18" rims. Once again thanks to Scott for promptly answering emails and questions. I got this done real quick.