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  #1  
Old 06-02-2015, 02:04 PM
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Help With Brakes! Need new Rotors, What SIZE!

Holy cow have I had a hard time just trying to buy the right parts.

I have a 2012 Overland 4x4 Hemi. So Quadralift and such is all on it. The build says HD brake package. Not a single website that I have found will lead me to a definitive size of the rotors. I have 90k on the clock so I will just change out all of them front and rear and new pads.

What size rotors go on my truck!

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  #2  
Old 06-02-2015, 02:57 PM
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Re: Help With Brakes! Need new Rotors, What SIZE!

Quote:
Originally Posted by WilliamS View Post
Holy cow have I had a hard time just trying to buy the right parts.

I have a 2012 Overland 4x4 Hemi. So Quadralift and such is all on it. The build says HD brake package. Not a single website that I have found will lead me to a definitive size of the rotors. I have 90k on the clock so I will just change out all of them front and rear and new pads.

What size rotors go on my truck!
If you want Mopar rotors, but want to buy online rather than local dealer parts, try Factory Mopar Parts - Wholesale Mopar Catalog. You can get close by inputting your year, make, model, trim level, engine, but then you can enter your VIN and get really close.

If you are buying aftermarket, and they can't tell you exactly what you have from your make/model/trim/engine/drivetrain, go to another store.
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Old 06-02-2015, 03:33 PM
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Re: Help With Brakes! Need new Rotors, What SIZE!

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Originally Posted by lstowell View Post
If you want Mopar rotors, but want to buy online rather than local dealer parts, try Factory Mopar Parts - Wholesale Mopar Catalog. You can get close by inputting your year, make, model, trim level, engine, but then you can enter your VIN and get really close.

If you are buying aftermarket, and they can't tell you exactly what you have from your make/model/trim/engine/drivetrain, go to another store.
Even that website is not correct. Ahh crud. I tried 3 different trims and models to confirm as Im sure the base v6 2wd and the SRT8 surely do not use the same rotor. Not according to that website. Bugger!
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Old 06-02-2015, 11:47 PM
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Re: Help With Brakes! Need new Rotors, What SIZE!

The HD brakes use 350 mm front rotors and 330mm Vented rears
The standard duty brakes use 330 front and 330 Solid rears. So if your rear rotors are vented then you definitely have HD brakes, solid rotors definitely SD.
They both use the same front pad, I'm 90% sure the rears are different between sd and hd.
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Old 06-05-2015, 01:39 PM
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Re: Help With Brakes! Need new Rotors, What SIZE!

just call your local dealer, give them your VIN and ask them. Then go online and order what you need. Done.


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Old 06-05-2015, 11:04 PM
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Re: Help With Brakes! Need new Rotors, What SIZE!

Quote:
Originally Posted by WilliamS View Post
Holy cow have I had a hard time just trying to buy the right parts.

I have a 2012 Overland 4x4 Hemi. So Quadralift and such is all on it. The build says HD brake package. Not a single website that I have found will lead me to a definitive size of the rotors. I have 90k on the clock so I will just change out all of them front and rear and new pads.

What size rotors go on my truck!
For the first generation WK2 there are only 2 brake packages.
Normal and HD.
The V6 models only come with the 'normal' brakes, even with the tow package. I'm not sure if the V8 came with the 'normal' brakes or just the HD brake package.

The normal front brakes are 330mm diameter with solid rear rotors.
The HD brakes are 350mm diameter with vented rear rotors.

Front brake pads/calipers are the same no matter which rotor.

68035012AB [2 required]
front brakes, rotor Grand Cherokee w/Heavy Duty Brakes

I can provide rear OEM part numbers also.

I have a V6 and intend to upgrade to the HD brakes when mine are worn out. All I will need is the new caliper mounts, the 350mm discs and of course new pads (I won't even need to disconnect brake hoses!).

I intend to go with Frozen Rotors discs, they are located just south of me in Burnsville, MN so I will pay taxes, but no shipping.

High Performance Brake Pads and Brake Rotors - Frozen Rotors
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Old 06-06-2015, 11:14 AM
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Re: Help With Brakes! Need new Rotors, What SIZE!

Quote:
Originally Posted by Todd3.6 View Post
For the first generation WK2 there are only 2 brake packages.
Normal and HD.
The V6 models only come with the 'normal' brakes, even with the tow package. I'm not sure if the V8 came with the 'normal' brakes or just the HD brake package.

The normal front brakes are 330mm diameter with solid rear rotors.
The HD brakes are 350mm diameter with vented rear rotors.

Front brake pads/calipers are the same no matter which rotor.

68035012AB [2 required]
front brakes, rotor Grand Cherokee w/Heavy Duty Brakes

I can provide rear OEM part numbers also.

I have a V6 and intend to upgrade to the HD brakes when mine are worn out. All I will need is the new caliper mounts, the 350mm discs and of course new pads (I won't even need to disconnect brake hoses!).

I intend to go with Frozen Rotors discs, they are located just south of me in Burnsville, MN so I will pay taxes, but no shipping.

High Performance Brake Pads and Brake Rotors - Frozen Rotors

So the easy give away would be the rear rotor would indicate HD or not. I would assume the Overland 4x4 Hemi would have the HD package. Although little does surprise me anymore.
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Old 07-04-2015, 06:53 PM
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Re: Help With Brakes! Need new Rotors, What SIZE!

Hi Todd et al.

Looking for pad part numbers for the rear brakes.
I have a 2011 WK2 Overland 5.7L w/HD brakes.

Rear pads are at the wear indicators and man do they make some noise.

Anyway, Looking for the correct part numbers for the Akebono Pads, or any great pads that are reasonable in price, going to use the same rotors as they are still good.

Have read many different numbers from different posts.

Thanks,
Falcon

Quote:
Originally Posted by Todd3.6 View Post
For the first generation WK2 there are only 2 brake packages.
Normal and HD.
The V6 models only come with the 'normal' brakes, even with the tow package. I'm not sure if the V8 came with the 'normal' brakes or just the HD brake package.

The normal front brakes are 330mm diameter with solid rear rotors.
The HD brakes are 350mm diameter with vented rear rotors.

Front brake pads/calipers are the same no matter which rotor.

68035012AB [2 required]
front brakes, rotor Grand Cherokee w/Heavy Duty Brakes

I can provide rear OEM part numbers also.

I have a V6 and intend to upgrade to the HD brakes when mine are worn out. All I will need is the new caliper mounts, the 350mm discs and of course new pads (I won't even need to disconnect brake hoses!).

I intend to go with Frozen Rotors discs, they are located just south of me in Burnsville, MN so I will pay taxes, but no shipping.

High Performance Brake Pads and Brake Rotors - Frozen Rotors
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Old 12-23-2015, 02:44 PM
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Re: Help With Brakes! Need new Rotors, What SIZE!

So i just got a powerstop 1 click brake kit thru auto zone for my 2014 limited ecodiesel (pn k5952). This kit included front 330mm rotors and solid 330mm rear rotors and pads. After comparing and measuring I confirmed that i need 350mm fronts along with vented 330mm rears. I spoke to a customer rep at powerstop and she gave me the part numbers i need.

Front rotors pn:AR83078xpr (xpr denotes a pair of rotors)
front pads pn:17-1629
rear brake kit (pads and rotors) pn:k5953

right now I am looking into finding a site where i can order these parts using the part number and not the "enter your year/make/model/engine" method that most car part sites use, since that got me the wrong kit in the first place.
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Old 12-27-2015, 06:30 PM
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Re: Help With Brakes! Need new Rotors, What SIZE!

The "Frozen Rotors" site that I posted above does a great job of telling you what brake rotor sizes are available, they even note the larger SRT rotors.

They offer Hawk brake pads which are a good product.
EBC is another good product name for brake pads.
EBC Brakes - Brakes for Cars, Motorcycles, Trucks and SUV
And a lot of local auto parts stores carry EBC.

Except for the SRT, the front and rear pads are the same part number no matter which brake package you have. So if you are only looking for new pads, it doesn't matter which brake package you have (HD or standard).

Except for the SRT...
Front rotors are either 330mm or 350mm disc.
Rear rotors are either 330mm solid or 330mm vented discs.

The rear vented discs use a different caliper (to allow for the wider width of the vented disc).

The front discs use the exact same caliper with different mounting brackets depending on your disc size.

More important notes:
If you are ONLY changing pads and rotors (or just pads) you should NOT need to bleed the brakes.
Remove the calipers and then use a C clamp to push the piston back into the caliper (slowly!) with the brake reservoir cap off (to allow for the fluid to push back into the reservoir).
If you are not actually holding the caliper after removing it from the mounting make sure you hang it from something! I usually use an old coat hanger and hang it off the coil spring. DO NOT let the caliper hang from the hydraulic hose as you will damage the hose.
If you pads are worn, you may not need new discs (unless they are damaged). Depending on the pads, some discs will last for 2 sets of pads. I don't have the specs handy for minimum rotor thickness. Most people just replace the discs with the pads to be safe, but if you are on a tight budget perform a Google search to find the minimum safe disc thickness spec.
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Old 12-28-2015, 06:47 AM
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Re: Help With Brakes! Need new Rotors, What SIZE!

Quote:
Originally Posted by Todd3.6 View Post
If you are ONLY changing pads and rotors (or just pads) you should NOT need to bleed the brakes.
Remove the calipers and then use a C clamp to push the piston back into the caliper (slowly!) with the brake reservoir cap off (to allow for the fluid to push back into the reservoir).

I usually prefer to open the bleeder and push the ugly fluid from the caliper into a can rather than back up into the system..
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Old 12-28-2015, 11:36 AM
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Re: Help With Brakes! Need new Rotors, What SIZE!

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Originally Posted by tomk View Post
I usually prefer to open the bleeder and push the ugly fluid from the caliper into a can rather than back up into the system..
If your fluid is looking bad at the caliper you are usually better off to just flush the entire system.

Brake systems should be flushed every 3 years....
Speaking of which, I am due.
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