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Tool Talk Discussion Forum

Ford Truck brake rotors.

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Dave F.

09-18-2003 10:10:12




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This is the second Ford truck I 've owned, seems like the brake rotors, warp easly for some reason. Has anyone tried the drilled rotors, from J.C. whitney? I know they are more expensive, are there any advantages, do they hold up any better? Thanks Dave F.




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Trucker

09-24-2003 23:57:11




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 Re: Ford Truck brake rotors. in reply to Dave F., 09-18-2003 10:10:12  
Ive owned a bunch of Ford pickups and you need to torque the lug bolts.Most people just run them up with an impact wrench,but if you have somebody that doesnt know,or much care running the wrench,they can get them way too tight,and if you dont cross it out as you put it on its going to wobble.



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ret

09-23-2003 02:07:31




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 Re: Ford Truck brake rotors. in reply to Dave F., 09-18-2003 10:10:12  
bought an 88 F 150 from a guy that saved all of his invoices. He had a lot of rotors replaced on it. Took it to a Ford mech I know and he replaced the rear brakes, they were down to the rivets. He said that was the problem, fronts were doing all the stopping. Don't buy junk rotors either. Ret



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kyhayman

09-19-2003 19:28:57




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 Re: Ford Truck brake rotors. in reply to Dave F., 09-18-2003 10:10:12  
Now I am curious. Sure dont want to start a brand war her because I have run Ford and Dodge both, and had good and bad ones in both (1/2, 3/4, ton, and Dakotas). Only ever warped 2 set of rotors (on a 1/2 ton Ford and a Dakota (caliper stuck on the Dakota and rivits hit the rotor on the Ford). Never owned a trailer with brakes and pull big loads (just got in with a 15K load on a goose neck).

I know heat warps rotors. I figure on 40-50K miles on a set of brakes and 3-4 sets of brakes (and rotor turns) on a set of rotors. Wondering what is going on to cause this much warpage on yours?

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Chris V

09-19-2003 05:00:39




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 Re: Ford Truck brake rotors. in reply to Dave F., 09-18-2003 10:10:12  
I have a '94 F150 and have warped the rotors in the past. I am also an auto mechanic since '89. One the most important things that will help is the rear brakes. The rear brakes must be adjusted so they do their share of stopping. The split is the front brakes do 60% of stopping the rear do the other 40%. But if the rear brakes are loose those numbers change. The fronts will do more of the job and run temps higher, causing warpage. It can be evidenced by a lower than normal pedal, longer stopping distances, and frequent warpage of front brake rotors. I've had it happen to me too. I do use aftermarket rotors, without problems. I have also used bendix in the past with the same results. The truck has 153,000 miles on it.

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David

09-18-2003 19:29:48




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 Re: Ford Truck brake rotors. in reply to Dave F., 09-18-2003 10:10:12  
I have had the same problem. The rotors seem to be a little small for med to hard use. Mine would be fine until the first time I had to get on them hard or hauled a load. I tried many things but finally got the best performance by getting new oem or name brand (no cheap foreign,Auto zone,Advance, etc are trash) rotors and using regular organic pads. Metalic sops quicker because it has more friction, thus more heat! I make sure my trailer brakes are good and use my head on stops and slow down near stop situations and have had no more problems. I have found the cheap chain stores have a nice cozy garauntee wich does you no good when you dont stop, allthough they will replace the rotors and pads for free unless the wreck broke them. Personally I dont like changing things every week that should last a year or two. Also drilled rotors should be kept for race cars, I would never run them on the street as I have seen many falures of them on the track. They are sacrificing strength and durability for weight.

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Vern-MI

09-19-2003 04:24:52




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 Re: Re: Ford Truck brake rotors. in reply to David, 09-18-2003 19:29:48  
I certainly agree that getting on the brakes hard and stopping heavy masses is hard on the brake pads and rotors. It is because of disipated energy over time. As the time is shortened, as in a panic stop at high speed, the more energy has to be disipated in heat per unit time and the rotor gets hotter. What I'm confused about is how the pad material affects temperature in a same stopping energy situation. How do the ceramic, Raybestous Quietstop, pads perform as compared to other materials in a same energy situation?

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David

09-19-2003 04:55:35




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 Re: Re: Re: Ford Truck brake rotors. in reply to Vern-MI, 09-19-2003 04:24:52  
Its all about friction. Ceramic pads alow higher temps before failure. Ever see how winston cup cars on the short tracks with ceramic pads make their rotors glow red. The lesser pads have less friction but not as much stoping power so you stay on them longer,but they dont get as hot on short duration stoping. it is a trade off always. Smart driving is the best solution.



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walt

09-18-2003 14:59:57




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 Re: Ford Truck brake rotors. in reply to Dave F., 09-18-2003 10:10:12  
Things I've read about drilled, they tend to crack hole to hole. I would check if you have a torque spec for the tire lugs. Lots of cars have a spec torque for them, and the impact wrenches put uneven torque on the rotors and warp them pre-maturely. I ask the tire shop to use a torque wrench as opposed to impact.



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max

09-18-2003 13:18:18




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 Re: Ford Truck brake rotors. in reply to Dave F., 09-18-2003 10:10:12  
Dave
Might want to take a close look at your calipers.
If they stick you will eat up every rotor you put on there.



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Hal/WA

09-18-2003 18:29:05




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 Re: Re: Ford Truck brake rotors. in reply to max, 09-18-2003 13:18:18  
I agree. The caliper has to be able to move easily on its sliding mechanism or it will warp the rotors, as well as wear out one side of the pads faster than the other. Good luck.



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RJ-Az

09-18-2003 19:40:54




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 Re: Re: Re: Ford Truck brake rotors. in reply to Hal/WA, 09-18-2003 18:29:05  
Good quality rotors are a must,Calipers must be able to float and the drilled rotors are ok on sports cars but not for light trucks. There ain't no such thing as a lifetime brake pad. There are torque sticks (calibrated sockets) available for 1/2" Dr. impact wrenches but you usually have to buy the whole set. But proper wheel tourque is a must. After market dressup wheels can cause problems also.

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JYD

09-20-2003 18:27:05




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 Re: Re: Re: Re: Ford Truck brake rotors. in reply to RJ-Az, 09-18-2003 19:40:54  
Stop jet stoppin and don't put the squeeze on overheated rotors
If you don't ease up on the pedal and or let the vehicle roll a little you heat soak the rotor ,this in combination with excessive pressure causes hard spotts and changes the thickness !
Basicly you are hammer tempering the rotor
try this put a nickle on your work bench whack it twice with a 32 oz. hammer now touch it . Warm ? whack it two more time and see if it feels any hotter .
now measure it against another one .
virtualy Amazing
stopping the hammer caused heat while the hammer aplied pressure.
Heat and preasure changed the metal

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