850 front end shaking while braking
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I've been told that warped rotors are VERY common on the 850, especially automatics where you can't use the torque to slow you down. My Jetta at 65 slows down quite a bit when you get off the gas.
Our Project 854R, which is going up soon, is having the same problem. I'm fairly certain it's more of a design issue and the brakes don't cool enough for someone who uses them heavily, and in DC traffic, I use them heavily.
We're talking to IPD right now about two options. The first are slotted rotors and new pads. This could be the fix, but they've also been trying to source a newer Volvo OEM big brake kit using existing parts and thus ease of part replacement. There is another European big brake kit through Volvo dealers made by ALCON maybe??? but getting the pats here in the US is not easy. Most other big brake kits necessitate use of 17" wheels year round which is not an option here for me in the North East, not to mention they are very expensive.
I'll make sure to keep you guys updated on the IPD thing.
Our Project 854R, which is going up soon, is having the same problem. I'm fairly certain it's more of a design issue and the brakes don't cool enough for someone who uses them heavily, and in DC traffic, I use them heavily.
We're talking to IPD right now about two options. The first are slotted rotors and new pads. This could be the fix, but they've also been trying to source a newer Volvo OEM big brake kit using existing parts and thus ease of part replacement. There is another European big brake kit through Volvo dealers made by ALCON maybe??? but getting the pats here in the US is not easy. Most other big brake kits necessitate use of 17" wheels year round which is not an option here for me in the North East, not to mention they are very expensive.
I'll make sure to keep you guys updated on the IPD thing.
thanks for the help. the rotors were new @ 3 months ago. (european aftermarket & aftermarket pads). they worked fine for about 1 month. then the shaking began and got progressively worse. they then turned the rotors and replaced the pads. they did use the blue gel on the pads.
could it be a bad cv joint? motor mounts (auto trans)? thanks again!!
could it be a bad cv joint? motor mounts (auto trans)? thanks again!!
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There's a Swedish shop in northern Rockville, off of Gude Drive. They do Volvo and Saab, though we'll see. I'll either have work done by them or by Annapolis Volvo depending on what it is.
I'll try to dig up the link.
I'll try to dig up the link.
Shooin,
There are a couple of different things that could cause the vibration. I guess the first and most important question that I have for you is...When you apply the brakes, do you feel the vibration in the brake pedal? Does the vibration transmit through the steering wheel? Does the car pull to one side or another when braking hard? When the car is moving and you are not on the brakes, is there a vibration? Also, how is the weather where you are? Sometimes ice can get packed in the wheel and stick there and cause all kinds of problems. Same goes for the CV shaft. I have actually had ice frozen to mine after driving through deep snow. Anyhow, just a few things to look at. Let me know what you find.
Prospero
George...I will check out the link whenever you post it. Thanks again. Guess I will see you on Sunday.
There are a couple of different things that could cause the vibration. I guess the first and most important question that I have for you is...When you apply the brakes, do you feel the vibration in the brake pedal? Does the vibration transmit through the steering wheel? Does the car pull to one side or another when braking hard? When the car is moving and you are not on the brakes, is there a vibration? Also, how is the weather where you are? Sometimes ice can get packed in the wheel and stick there and cause all kinds of problems. Same goes for the CV shaft. I have actually had ice frozen to mine after driving through deep snow. Anyhow, just a few things to look at. Let me know what you find.
Prospero
George...I will check out the link whenever you post it. Thanks again. Guess I will see you on Sunday.
thanks.
the car does not pill to either side, there is light vibration in the pedal but the steering wheel shakes and vibrates. this only happens while braking. wheather here is great southern california (but rain today).
i appreciate your input, ive been told possibly calpiers, rotors (again?) cv or motor mounts.
the car does not pill to either side, there is light vibration in the pedal but the steering wheel shakes and vibrates. this only happens while braking. wheather here is great southern california (but rain today).
i appreciate your input, ive been told possibly calpiers, rotors (again?) cv or motor mounts.
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From what I've found, the only cheap fix is some sort of vented rotor. IPD does do a slotted rotor that could do the trick.
I will probably be doing this modification to our 850R.
IPD is also working on a big brake kit using Volvo OEM parts, but I'm not sure of the status on this, but it sounds intriguing. If it comes together, I would assume that it would only allow 16" wheels or bigger, a detriment if you run snow tires, though well worth the trade. Sounds like snow isn't an issue yor you anyway.
I will probably be doing this modification to our 850R.
IPD is also working on a big brake kit using Volvo OEM parts, but I'm not sure of the status on this, but it sounds intriguing. If it comes together, I would assume that it would only allow 16" wheels or bigger, a detriment if you run snow tires, though well worth the trade. Sounds like snow isn't an issue yor you anyway.
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