Vibration/Motion Absorber
Stock, the Tranny Mount's first and foremost duty is to isolate vibration from the interior cabin.
With a solid mount for track cars, like our
VAC Solid Aluminum Mounts, your interior cabin noise may increase to the point where it would be uncomfortable for a street car.
These UUC urethane mounts are also great for a track race car, but one that sees occasional use on normal roads.
Deflection Fighter
The tranny mount is also used to combat transmission "movement" during driving (HUGE for your BMW).
OEM BMW tranny mounts are a known weaknesses across the brand. They are known to cause everything from miss shifts & over revs, to physical chassis damage.
Since the transmission is connected to the back of the engine, it is the engine which is doing the twisting when one accelerates or decelerates (engine braking).
In a street situation, some movement is expected, however too much movement (like your aged OE mounts) will cause the transmission to become misaligned with the chassis of the car, or simply break apart all together. This is when failures and miss-shifts can occur, big bad- expensive news.
The Ideal Mount
Hundreds of drivers from daily driven cars to full track cars have gained the benefit of stiffer bushings with near elimination transmission movement.
Stronger than OE
- Ready for track or dual use vehicles
- Practically a must have for high powered cars with aggressive drivers
- Helps eliminate a known weakness
- Incorporates small notch required for certain models, including E46 330i/Ci 6-speed.
These red urethane bolt-through transmission mount bushings are the strongest choice that still absorbs vibration.
Highly recommended for all 6 cylinder models, a bit more vibration is transmitted on V8 models.
A single bolt through the entire piece eliminates the possibility of bushing material failure even under abusive conditions, and that's why this is our mount of choice.
Offers nearly the same drive train motion control as a solid delrin or aluminum mount, but with satisfactory vibration isolation to reduce vibratory stress on mechanical components and keep cabin occupants comfortable. Cabin vibrations are significantly lower than delrin/aluminum solid mounts, but is still noticeable vs OE rubber. Transmission mount enforcer cups not required with these pieces.
VAC Tech Note:
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