Rogue Engineering Thrust Arm Bushings
- E39 M5/540
handling your E39 M5/540 that it deserves!
As BMW E39 M5/540s get higher in mileage, you can start to feel a
shimmy that occurs in the front suspension at highway speeds. This
often gets worse while braking, which makes it feel like tires are out of
balance or rotors are out-of-round. The common problem is that the
front thrust arm bushings go bad, leaving for handling that has much to be
desired. Instead of replacing the factory front thrust arm bushings
every 60k miles (less if driven hard), our solution is designed to to
outlast and outperform the factory bushing.
Engineering's Thrust Arm Bushings (TABs) is an elegant, engineered
solution to this issue. How do we do it? See below how we
sweat the details.
No Need to
One of the biggest reasons why the factory E39 M5/540 thrust arm
bushings (BMW p/n 31-12-0-006-482) wear out so quickly is that they are
continually under stress (load). As
you drive the car, the factory thrust arm bushings have continual
torsional loads being exerted onto the bushings while driving. This
continuous twisting load on the on the inside of the bushing is the
beginning of the end for the factory bushing. Some people have tried
to used factory X5 bushings as replacements (BMW p/n 31-12-6-769-715) with
better results, but we're looking to resolve this in a big way.
TABs are designed allow the thrust arm to move without this spring load,
but instead, allowing movement though its range without this specific
resistance. By allowing the center bolt sleeve to pivot instead of
our custom urethane-silicone bushings smoothly, there is no unnecessary
wear and tear.
Some will try to compare the Rogue Engineering Thrust Arm Bushings
to a currently available urethane replacements. There is a big
difference! Instead of using urethane to control the entire area of
deflection, we've engineered an aluminum housing to reduce the ID of the
hole of the thrust arm bushing. By doing this, we can fine tune the
urethane compound so that we can get performance without unwanted NVH.
In order to get our level of deflection control, other companies would
have to make their entire bushing so incredibly hard that their product
would either vibrate, squeak or both!
The Rogue Engineering TABs
does more than reduced unwanted thrust arm movement and extend bushing
life. By producing the RE TAB with a centered configuration, we
slightly reduce the vehicle's excessive factory front caster. This
means better steering wheel response in everyday and performance driving.