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Drilled and Slotted Rotors

9K views 34 replies 16 participants last post by  Earthworm51  
#1 · (Edited)
Just wondering if anyone else had made a switch, I did mine last year as I can't leave well enough alone. When I first put them on, I took it for a test drive hit the brakes about went through the windshield, but had my seatbelt on. I guess now that they're broke in they are not as sensitive. I know when you are using your brakes a lot the d/s will stay cooler than the original ones, at least they are supposed to. They sure made a difference on the front of my Jeep Comanche.
 
#2 ·
Doesn't dirt and mud get in the holes and cause problems? I see them on motorcycles drilled like that but those seldom see the kind of "road" a Jeep would be driven on.
 
#3 · (Edited)
I have not had any problems yet, but the brakes acted up once in the snow when I was off-road. I figured it was the anti-lock Brake system, who knows not worried about it. Remember the old CJs with the drum brakes on the front, drive out of water, get on the street with the brakes all wet, that was one %^)( of a ride. What a wild ride that was, hit the brakes and go from side to side, talk about scarey. Once you got used to it, you knew what to expect, DANGER!!!!!!!!!
 
#5 ·
Remember...I may be getting older but I can still recall last summer. :)

Oddly, the Jeepster is quite good about braking straight. But every so often.....WOW! I have never had the Willys pull when braking.
 
#6 · (Edited)
They help out on the winding roads on the coast. Thank you for the information. You probably have never tried them, just your opinion. I appreciate your input, Thanks as I have had Jeeps for 35 years, and I don't know what I'm doing, every bit of information helps. Did they discontinue rear disc brakes on the 08 Patriot, can't remember as I get older, could you refresh my memory. Thank You, much appreciated. I forgot, one more thing, do you think they would help if I pull a Trailer? I mean they have to be good for something besides money.
 
#10 ·
Drilled and slotted are great for driving at high speeds(over 90mph) and then back down again. True, they help with cooling and protect against brake fade, however they are useless to someone just driving at typical speeds. They offer no advantage off road. So, hopefully you did not pay too much for them.
 
#13 ·
I think it depends on the vehicle

I have a 2000 Maxima since new. My first front brake job was at 5000 miles then 2 more by the time I hit 50k- they kept warping. It was right around 50k when I put some cheap drilled rotors and ceramic pads- I remember spending around $200 total (front only) and taking me about an hour. I now have 127k miles and have not had a single issue. So I swear I will always use them if I have a vehicle that warps the rotors. For the record, I also have a 2001 Tahoe that has no warping issues. I am pretty sure nissan did not put the right size original brakes on that car for its speed and weight. Bottom line- warping- make the switch because theres nothing more annoying than hitting the brakes hard from 80mph and having the car shake all over the road.
 
#14 ·
IIRC all 07 models were 4 wheel disc, FSM seems to confirm this. Nothing is mentioned about drums except for the parking brake.

The standard brake package on this vehicle is the "16-inch" vented front disc/"14-inch" solid rear disc with ESP (BRF).

Export vehicles use a BR1 brake package. Early launch vehicles use a BR1 brake package comprising of "16-inch" vented front disc/"14-inch" solid rear disc brakes while later launch vehicles use a BR1 brake package comprising of "16-inch" vented front disc/"16-inch" solid rear disc brakes. Both packages include ESP.

"16-INCH" FRONT DISCS
"16-inch" front disc brakes (so called because they are designed to fit inside 16-inch or larger wheels) feature 2.2 inch (57 mm) single-piston floating calipers acting on 11.5 x 1.0 in. (294 x 26 mm) vented disc rotors.

"14-INCH" REAR DISCS
"14-inch" rear disc brakes (so called because they are designed to fit inside 14-inch or larger wheels) feature 1.4 inch (35 mm) single-piston floating calipers acting on 10.3 x 0.39 in. (262 x 10 mm) solid disc rotors.

"16-INCH" REAR DISCS
"16-inch" rear disc brakes (so called because they are designed to fit inside 16-inch or larger wheels) feature 1.4 inch (35 mm) single-piston floating calipers acting on 11.8 x 0.39 in. (302 x 10 mm) solid disc rotors.
 
#19 · (Edited)
I hear ya, the vehicle always seems to go faster after you wash it, especially in the Dark. You have never used D/S rotors? I wish I would have asked you before I changed them, you could have saved me some money. Do you think they helped out when I put them on my 1987 Jeep Comanche, which I have had for about 23 years. Bought it new, when you were about 9 years old. Thank You for the info.
 
#22 · (Edited)
Yes, it's actually over 9.000 miles. I have other jeeps and a car to drive. My Jeep Comanche, which I bought new in March 1987 just turned 98,000 miles. I don't know the miles on my CJ5, as the speedometer, dash changes , and different motors can't keep track. I also have another 1971 CJ5 that went through the Rubicon Trail 37 times. It is currently, what you call, a Driveway Monument as it is not running due to a tired engine.
 
#23 ·
Yes I had it to 110mph, at 4:45 A.M., on the way to work. I let off when my Headlights were'nt keeping up with my speed when I went under an overpass. If that makes any sense. The Patriot seemed to have more in it, when I let off. I can't do those things too often as I am a School Bus Driver. Big Trouble. No I don't drive my Bus that way. Akula, no problems with your earlier Post. Thank You
 
#25 · (Edited)
Who said I needed them. I said I put them on my Patriot, my other ones were like new, just had to do it. I have a question, did they put drum brakes on the rear of your 08 Patriot? I thought I read that they did, then went back to disc, just curious. Here's another one, why did I have custom painted pinstripping put on my Patriot. The answer is, because I did. HEEE HEEE!!!!!! I'm not trying to be a wiseguy, I have done all kinds of modifications just to be different. Thanks.
 
#26 · (Edited)
Yes, my Pat has rear drum.

Think you misunderstood me on the rotors, I said I really didn't need them but I still had them on. :p

I didn't go through pads any quicker with them, that may not be the case for all. Would I do it now? No, not really worth it. I'd rather put the money into things that will make a noticeable improvement. I don't see myself doing anything performance based with my Pat those funds go into my CTD, hell I still haven't had the windows tinted yet, plus I bought her exclusively for commuting. Her total bill (Payments, Fuel, Insurance) is less than what I was paying just in fuel for the CTD. I'm sure we all do something to be different, first week I had my CTD I took off all the TRX4 Decals, then I removed all the chrome badges, much cleaner looking...Still looking for time to repaint just the Cummins Badges black and put them back on.
 
#28 ·
I've got a 2009 with drums in the rear....much to my dismay :-(
 
#30 ·
Yeah ...i knew about it before i bought it, but still kind of ridiculous. I understand cost cutting measures, but still...4-wheel discs and power windows/doorlocks should be standard.

Interestingly our 2007 VW Rabbit has all those things for less money..
 
#31 ·
OP, when you changed your rotors, did you change your pads and bleed the lines too? That usually makes a bigger difference in performance on a street vehicle than the rotors, at least until they warp.

Anyway, if you have noticed a loss in braking performance, start with bleeding the brake liens again.
 
#32 ·
This drum-vs-disc on the rear is puzzling.
I have an '08 with discs on all 4.

Is it a package/options issue?

BTW: Regarding the slotted discs, I wouldn't spend my money on them for the Pat. But we're talking about Earthworm's Pat, and his money... more power to him if we wants em.
 
#34 ·
discs for all four wheels is better since there is less fade and cool down time with discs. As to drilled and slotted rotors, they can make a difference for fade with a lot of braking they resist brake fade and also glazing. Glazing is when you push down on the brake and nothing happens because there is no friction. When I was young I my brakes glazed,and it was scary, my brakes so hot they were smoking.
Depending on what kind of driving you do eg. canyon or hills, cross drilled, slotted or both can have it's benefits. I know it the price is a little more when it comes time to change my rotors I will go with cross drilled myself, just for wear with the pads. Something to think about if you are hauling a trailer as well.