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Car Forum / Ford / Ford Trucks / January 2007Front End Shimmy
My 2004 F-150 now has a bad shimmy in the front end. It doesn't so much feel like a side-to-side shimmy. It's more like and up and down shimmy. But it only happens when I'm hitting the brakes. Usually between 55 to 35 MPH it'll shimmy the front end with the brakes engaged. I recently had the wheels (rims and tires) rotated and electronically balanced thinking it was a misbalanced tire. But the problem is still there. I had the brakes redone by Brake Check about a year ago. They had to resurface the rotors and replace the brake pads. They seemed to have done a good job at the time, and that was about a year ago now. Any suggestions would be greatly appreciated. You most likely have a warped rotor. Most rotor problems come from improperly torqued lugnuts. >My 2004 F-150 now has a bad shimmy in the front end. It doesn't so much >feel like a side-to-side shimmy. It's more like and up and down shimmy. [quoted text clipped - 8 lines] > >Any suggestions would be greatly appreciated. > You most likely have a warped rotor. > Most rotor problems come from improperly torqued lugnuts. [quoted text clipped - 11 lines] >> >> Any suggestions would be greatly appreciated. And the torque is listed in the owners manual. Since I started torquing my lug nuts to the proper torque for the vehicle, I have never had warped rotors. That was 15 years ago that I started. Is this something I can come back to Brake Check and make them fix? I have my receipt for the brake work they did last April. > > You most likely have a warped rotor. > > Most rotor problems come from improperly torqued lugnuts. > > > And the torque is listed in the owners manual. Since I started torquing > my lug nuts to the proper torque for the vehicle, I have never had > warped rotors. That was 15 years ago that I started. > Is this something I can come back to Brake Check and make them fix? I have > my receipt for the brake work they did last April. You can try, but I doubt it. Also if the rear brakes are way out of adjustment it can cause the fronts to work harder, generating more heat which can also warp rotors. I find it a 35-50 mix between the two as the cause, also stuck calipers, froze slides etc. Whitelightning > Is this something I can come back to Brake Check and make them fix? I > have [quoted text clipped - 6 lines] >> my lug nuts to the proper torque for the vehicle, I have never had >> warped rotors. That was 15 years ago that I started. As already stated, you can try, but it is highly unlikely that they would do anything about it... To follow up. replacing the rotors and brakepads is the next step. Make sure a garage that uses a torque wrench or torque sticks is used. >You most likely have a warped rotor. >Most rotor problems come from improperly torqued lugnuts. [quoted text clipped - 11 lines] >> >>Any suggestions would be greatly appreciated. > You most likely have a warped rotor. > Most rotor problems come from improperly torqued lugnuts. [quoted text clipped - 11 lines] >> >>Any suggestions would be greatly appreciated. Dr. Phibes, there is a TSB out for your truck to have the rotors replaced with a new style of rotor. At the time of rotor replacement they also have to replace the calipers due to the change in the rotor. I recommend you take this truck to your dealership and have them verify that the TSB for the updated rotors has been done. Ford Tech Dr. Phibes, there is a TSB out for your truck to have the rotors replaced with a new style of rotor. At the time of rotor replacement they also have to replace the calipers due to the change in the rotor. I recommend you take this truck to your dealership and have them verify that the TSB for the updated rotors has been done. Ford Tech > You most likely have a warped rotor. > Most rotor problems come from improperly torqued lugnuts. [quoted text clipped - 11 lines] >> >>Any suggestions would be greatly appreciated. > My 2004 F-150 now has a bad shimmy in the front end. It doesn't so much > feel like a side-to-side shimmy. It's more like and up and down shimmy. [quoted text clipped - 8 lines] > > Any suggestions would be greatly appreciated. I have a 04 F150SC and the same thing happened to mine. Take it to the dealer, there is a TSB on exactly that problem. I was in and out in half a day and it cost zero to me. Ford sprung for new calipers and rotors in front and I have had no problems since. There was a problem in the early build out. The new brakes are a little spongy now but stop just fine. Joe Gee in El Paso >> My 2004 F-150 now has a bad shimmy in the front end. It doesn't so much >> feel like a side-to-side shimmy. It's more like and up and down shimmy. [quoted text clipped - 16 lines] > > Joe Gee in El Paso He can try, but it is a TSB, not a recall. being a TSB, once out of warranty, you pay. Unless like in my case you have the extended warranty. However, I don't think that is the problem with his. The TSB is for vibration when the brakes are NOT applied. In my case the caliper was actually gripping the rotor a bit causing heat and vibration. rotor never warped, but did turn a bit blue from the heat. You need to replace the rotors, not resurface them. And heck, you admitted that was a year ago. My money's on you being a two footed driver also. Am I right?  SignatureSteve Barker > My 2004 F-150 now has a bad shimmy in the front end. It doesn't so much > feel like a side-to-side shimmy. It's more like and up and down shimmy. [quoted text clipped - 8 lines] > > Any suggestions would be greatly appreciated. > You need to replace the rotors, not resurface them. And heck, you admitted > that was a year ago. My money's on you being a two footed driver also. Am > I right? NO. Single footer. > My 2004 F-150 now has a bad shimmy in the front end. It doesn't so much > feel like a side-to-side shimmy. It's more like and up and down shimmy. > But it only happens when I'm hitting the brakes. Usually between 55 to 35 > MPH it'll shimmy the front end with the brakes engaged. Surely you must realize the problem is the brakes. The reason cars shimmy or vibrate at only 35 to 55 mph (practically any car) is that the natural harmonic frequency of the suspension is matched by tire rpm at that speed. Basically any ordinary car with a tire out of balance will vibrate around 45 mph. That doesn't mean, though, that a tire imbalance is the only thing that can put a driving force for vibration into the suspension. So in your case, it's the brakes, and the problem is slight enough that it needs suspension harmonics to help it out. > My 2004 F-150 now has a bad shimmy in the front end. It doesn't so much > feel like a side-to-side shimmy. It's more like and up and down shimmy. [quoted text clipped - 8 lines] > > Any suggestions would be greatly appreciated. > My 2004 F-150 now has a bad shimmy in the front end. It doesn't so much > feel like a side-to-side shimmy. It's more like and up and down shimmy. [quoted text clipped - 8 lines] > > Any suggestions would be greatly appreciated. Ford knows all about his, look in service bulletins. They replaced both calipers and rotors on mine. Some need rack and pinion replaced on the early models. > My 2004 F-150 now has a bad shimmy in the front end. It doesn't so much > feel like a side-to-side shimmy. It's more like and up and down shimmy. [quoted text clipped - 8 lines] > > Any suggestions would be greatly appreciated. Ford knows all about his, look in service bulletins. They replaced both calipers and rotors on mine. Some need rack and pinion replaced on the early models. > My 2004 F-150 now has a bad shimmy in the front end. It doesn't so much > feel like a side-to-side shimmy. It's more like and up and down shimmy. [quoted text clipped - 8 lines] > > Any suggestions would be greatly appreciated. Dr. Phibes, There is a TSB out for your truck to have the rotors replaced with a new style of rotor. At the time of rotor replacement they also have to replace the calipers due to the change in the rotor. I recommend you take this truck to your dealership and have them verify that the TSB for the updated rotors has been done. Ford Tech > My 2004 F-150 now has a bad shimmy in the front end. It doesn't so much > feel like a side-to-side shimmy. It's more like and up and down shimmy. [quoted text clipped - 8 lines] > > Any suggestions would be greatly appreciated. Dr. Phibes, there is a TSB out for your truck to have the rotors replaced with a new style of rotor. At the time of rotor replacement they also have to replace the calipers due to the change in the rotor. I recommend you take this truck to your dealership and have them verify that the TSB for the updated rotors has been done. Ford Tech > My 2004 F-150 now has a bad shimmy in the front end. It doesn't so much > feel like a side-to-side shimmy. It's more like and up and down shimmy. [quoted text clipped - 8 lines] > > Any suggestions would be greatly appreciated. Dr. Phibes, there is a TSB out for your truck to have the rotors replaced with a new style of rotor. At the time of rotor replacement they also have to replace the calipers due to the change in the rotor. I recommend you take this truck to your dealership and have them verify that the TSB for the updated rotors has been done. Ford Tech UPDATE... The TSB number for this fix is 05-06-21. Then change is the style of rotor. It replaced the old rotor with new ones and you can tell if already have the new ones by counting the fins. The new style has 47 fins on the rotor, and like I already said, as well as someone else, they have to replace the calipers when they replace the rotors. Ford Tech >> My 2004 F-150 now has a bad shimmy in the front end. It doesn't so much >> feel like a side-to-side shimmy. It's more like and up and down shimmy. [quoted text clipped - 20 lines] > > Ford Tech |
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