BK054 review?

[robmustang201528]

Anyone installed these bushings on their car? Pros and cons? I hear they have some NVH. How bad is it? Thanks

Sponsored

 

[Burkey]

I would avoid them.
I had the red (urethane) inserts in my car and all I could hear was diff whine and clunking.
Swapped to a proper urethane diff bush (Whiteline KDT933) and haven’t heard any whine.
The clunks are still there but not as pronounced.
I swapped the bolts out for 12.9 grade while I was at it. Not sure how they compare to the BMR/Steeda bushes in terms of price in the US but here in Australia they were about 1/3 the price and a slightly softer durometer (90 vs 95 from memory).

 

[West TX GT]

I had them in my last car. Definite increase in NVH. It was a 3.73 PP that where known to have gear whine, which I had from day one at 65-70 mph. The whine did not get any worse but the clunks got much louder. I put bearings everywhere I could replace rubber but the only NVH increase that bothered me was that one.

 

[robmustang201528]

I had them in my last car. Definite increase in NVH. It was a 3.73 PP that where known to have gear whine, which I had from day one at 65-70 mph. The whine did not get any worse but the clunks got much louder. I put bearings everywhere I could replace rubber but the only NVH increase that bothered me was that one.

Did the clunks get louder when you were switching gears real hard and fast? Or just normal driving?

 

[robmustang201528]

I really don't know what to do. My bolts broke but I think it was because the installer didn't install the sleeves that go around the bolts. The RH017 BMR upgrade kit with sleeves that go around the bolt to improve strength. I don't know if I should keep my street bushings BK051 or upgrade to the aluminium BK054. That NVH is scaring me and im hoping since I'm adding the aluminium bushing, it doesn't add stress on something else and cause something else to break. Vibration is never good

 

[West TX GT]

Did the clunks get louder when you were switching gears real hard and fast? Or just normal driving?

It happens mostly on off throttle to throttle transition. Like when you are coasting to a light and it turns green so you hit the gas. A loud clunk when you hit the gas, even on partial throttle. It wasn't a deal breaker for the car. I loved that car and the way it felt. It's just that it didn't contribute much to the car but it added the most noise.

 

[shogun32]

Swapped to a proper urethane diff bush

the Whiteline are 85 Shore, the BMR are 95. I'm assuming 'D' scale. I suspect 70-75 is the "correct" hardness. I've got a set of Whiteline inbound and playing with the notion of taking a 1/4" endmill to them and cutting in some channels. Maybe filling the voids with a 60'ish rubber compound.

I will absolutely be replacing the fasteners with precision shoulder bolts instead of the wildly dimensionally inconsistent "standard" fasteners the various bandaid kits come with.

or upgrade to the aluminium BK054

Unless it's a race car I wouldn't. If you think the BMR ones are loud now, just wait. The whole design of the diff mount is just crap. Ford needs to fire the moron who came up with it and the manager that signed off on it.

 

[Stroked89coupe]

I have every upgrade in rear suspension from BMR. No sway bar. The car sounds like the rear end housing is about to fall out of it. Like seriously... If someone just put new gears in your housing for you and you heard this after you picked it up from them you would bring it back and tell them they messed something up. The car has 300 miles on it. Maybe it will get a little better, I'm not sure.

That being said it does not bother me one bit.

Sponsored