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OE Electric Parking Brake bible: We're looking at different rotors, add on parking brakes and also integrated electric parking brakes.

Grendel

Grendel

Iron Sharpens Iron
Joined
May 19, 2020
Member Number
297
Messages
3,582
This thread is to discuss adding OEM electric parking brakes onto our axles.

We've found 8 on 6.5" rotors, 5 on 5.5" rotors and most other bolt patterns.

We've looked at Tesla, Ford and GM as sources.
 

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Gumbybronco said:
I have an older 14b with the standard Chevy disk kit and I want a good parking brake. I would like something stronger than the ElDorado calipers to hold my 42”s and like the idea of adapting a newer OE electric parking brake. I have looked at the 2020 Silverado and Tesla electric parking brakes, but both use a rotor close to .75” thick compared to my 1.3” thick. I am not interested in a driveline brake.

View attachment IMG_1067.webp View attachment IMG_1068.webp

Is there an off the shelf 3/4” rotor that will fit the 14b?

Is there an electric parking brake that fits 1.3” rotor?

Or another option?
Click to expand...

There are some 2000s Cadillac limo/hearse factory options that used a .75" thick 8 x 6.5 rotor. I looked into this in the early days of jk junkyard one ton swaps but I never set one up.

From my notes

Napa Part #: NB 4886957
CENTRIC 12162067
BENDIX PRT5335
 
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tac1 said:
There are some 2000s Cadillac limo/hearse factory options that used a .75" thick 8 x 6.5 rotor. I looked into this in the early days of jk junkyard one ton swaps but I never set one up.

From my notes

Napa Part #: NB 4886957
CENTRIC 12162067
BENDIX PRT5335
Click to expand...
Did you get to the point of checking fit?
 
Grendel said:
Along for the ride.

Widen the calipers to fit. The Tesla's are made by Brembo and are 3 pieces. Or talk with Toby at KORE3.

Add on parking brake calipers for a 1.25" rotor:

www.summitracing.com

Wilwood Disc Brakes 120-15687 Wilwood Electronic Parking Brake Calipers | Summit Racing

Free Shipping - Wilwood Electronic Parking Brake Calipers with qualifying orders of $109. Shop Brake Calipers at Summit Racing.
www.summitracing.com www.summitracing.com
Click to expand...
I hadn’t thought about widening the calipers. That could be a simple solution. Has Toby done something similar?

I was hoping to take advantage of the OE supply. I have seen the Wilwood one and it’s very expensive. I can get a used pair of the Silverado parking brake calipers for about $2-300ish
 
Gumbybronco said:
Did you get to the point of checking fit?
Click to expand...
No I was trying to find a smaller volume rear caliper/rotor combination to improve brake pedal feel after 60/14 bolt swap. Slightly larger master cylinder bore made the owner happy, I never went any further.
 
Do you guys think the current Chevy front calipers I have would work with a .75” thick rotor?

I’ll reach out to Tony next week.
 
Gumbybronco said:
Do you guys think the current Chevy front calipers I have would work with a .75” thick rotor?

I’ll reach out to Tony next week.
Click to expand...
Front calipers would not be a parking brake?

I keep looking at some of these and they seem like you can pull the module off and retrofit to another.

1707596869119.png


The module, that looks sort of El Dorado-ish:

1707597081590.png






These are the two piece, that can become three piece:

1707597006301.png
 
www.summitracing.com

Wilwood Disc Brakes 140-15979-RD Wilwood Electronic Parking Brake Rear Retrofit Brake Kits | Summit Racing

Free Shipping - Wilwood Electronic Parking Brake Rear Retrofit Brake Kits with qualifying orders of $109. Shop Parking Brakes, Electric at Summit Racing.
www.summitracing.com www.summitracing.com

I know 4x4toyotatyler has purchased this kit. Not sure if he ever installed them. I believe he’s running wilwood disk brake kit.

Brennan garage has some. Rotor he uses is too thin for me. Not sure if he migrated over here


brennans-garage.com

Electric Emergency Brake ( EEBrake ) Rear Bracket Kit, 41-75 Jeep

Note: Slight price increase due to recent increases in material and shipping costs. This will now be a regular stock item going forward to make this more available. I am proud to announce the release of my early Jeep rear disc brake conversion with the electric emergency brake function for BETA...
brennans-garage.com
 
Cool thread to collect info on this, I want to add an electric ebrake to my rigs too.

Good call on looking at 1/2 ton trucks, looks like 19+ Ram 1500s have them too. But only a 22mm rotor. Hmmm
 
Posting so I get notified in the future. I’m in for the tech. I am very interested in an electronic e brake solution. I have looked and found most too narrow. I wonder when the 1 ton trucks will go with an electronic parking brake vs the drum style e brake
 
YotaAtieToo said:
What about 15+ F150s?

Google says 25mm rotor, so 0.98" not 1.3" but closer :laughing:
Click to expand...

Factory truck e-brake calipers are for 20-22mm thick rotors respectively:

I'm working on an Arduino project to control these calipers, but I've been distracted with other shit. Pantera electronics will alter his controller is one of us send him calipers to test on. He was surprised that there was this big of an e-brake requirement from the rockcrawler world.

I need to get off my ass and make some 14bolt bracket CAD drawings for these calipers.

LugsCircle (in)Circle (mm)OD (in)Min Thickness (in)Min Thickness (mm)YearMake ModelPosition
65.3149606313513.2280.7874015748202016FordF-150Rear
65.5139.713.2280.7874015748202020GMCSierra 1500Rear
55.5139.713.860.820.322020DodgeRAM1500Rear
86.5165.112.795275590.728346456718.52003CadillacDeville (Limo / Hearse)Rear
55.5139.711.771653540.7874015748201985JeepCJ7Front
 
FordFascist said:
I need to get off my ass and make some 14bolt bracket CAD drawings for these calipers.

86.5165.112.795275590.728346456718.52003CadillacDeville (Limo / Hearse)Rear
Click to expand...
Yes, please, for Tesla two piece e-calipers on those rotors, on a 14B.

The caddy does not have e-calipers.

1707683867414.png



That's a Caddy Limo kit by Power stop with rotors, that look like they're parking brake in hat. The rear calipers look like standard high performance from the FBody and Corvette line up.

2003 CADILLAC DEVILLE 4.6L V8 Caliper, Rotor & Brake Pad Kit | Shop Now at RockAuto

Brake & Wheel Hub Parts and More for Your 2003 CADILLAC DEVILLE at Reliably Low Prices. Fast Online Catalog. DIY-Easy. Your Choice of Quality. Full Manufacturer Warranty.
www.rockauto.com

Those rotors: More Information for R1 CONCEPTS 63346011L

With Tesla 2 piece calipers with e-brake would rock.
 
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Gumbybronco said:
I almost bought it, but $90 shipping is a lot.
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110.00 for a Brembo caliper is CHEAP.

BTW, I did confirm that the three male torx bolts hold the two pieces of the caliper together and you could make a spacer and use longer bolts.

I am not sure I need a 1.25" thick rotor, when I found high performance ones that will fit... but it would not take much to make a spacer for it and use longer bolts.
 
Gumbybronco said:
I found this interesting for controlling the electric parking brake.
I also saw the Pantara controller, but this looks really simple.
Click to expand...

I was looking at the Pantera controller originally. He has it ready for the Brembo already. I may still go that way - the guy who designed it is pretty cool and would adapt to a 1/2 ton rear. I need to get some F-150 or Silverado calipers and reach back out to him. Anyone got some to loan to a science project?

When I went through the iterations of this before, I decided it would probably be easier and more cost effective to run an OE hydraulic-emergency brake combo caliper off of a 1/2 Ton than to go down the Tesla path. Mostly because real estate is pretty tight when you're trying to not smash the shit out of a caliper on a rock. Plus the brackets are a lot easier to fabricate.
 
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I was just surfing google - and the Tesla Model S looks like it might have a 28mm/1.10" thick rear rotor, at least for some years? Just initial findings though, not confirmed yet
 
Yeah, we're getting close.

I emailed Tobin at Kore3 and talked with Gubni at Lugnut.
 
Tobin says he doesn't do custom abutments anymore, not enough time.

Gubni was sent this link today.

I am looking for a set up for a D60-2. 1970's vintage, 35 spline, semi-float axle, 5 on 5.5" bolt pattern. Why? because I have it.

Thinking a Tesla caliper as linked 5 on 5.5" rotor with a weld on bracket.

Will get around to it soon enough.
 
Is drum in hat an option?

The 2000s E-150 will have 5x5.5 discs with drum in hat as will a bunch of Dodge 1500s
 

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In for the tech

I want a mechanical parking only caliper that will fit a rotor 1.25-1.5" thick. Would consider electric too.

A 3 piece would be nice as I think I could make spacers to get it wide enough.

I don't know but it seems like there would be some demand for these aftermarket parking calipers to fit wider rotors. Not everyone is running the $$$ rotor package on their truck.
 
These calipers take a rotor with 1.18" discard thickness (30MM).

www.ebay.com

â16-21 OEM Tesla Model X S Rear Right Passenger Side Disc Brake Caliper Mando | eBay

Find many great new & used options and get the best deals for â16-21 OEM Tesla Model X S Rear Right Passenger Side Disc Brake Caliper Mando at the best online prices at eBay! Free shipping for many products!
www.ebay.com
and include abutments:

1708717992597.png



Which would fit that 8 lug caddy rotor, too.
 
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What's the year and model of this Caddy rotor people keep talking about?
 
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