Vibration at 45-55mph? Try this unexpected fix...
#1
RX-7 Pilot
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Join Date: May 2006
Location: Phoenix, AZ
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Vibration at 45-55mph? Try this unexpected fix...
I have had the common 45-55mph vibration on my FB for the past 18 months. Same in acceleration, deceleration and cruise. Balanced my wheels/tires, driveshaft (even swapped mine with my parts car) to no avail. Had to remove my 81's oil cooler to fix a hairline crack and that's when I saw the left front engine mount broken. Ordered two new mounts and a new transmission mount, all vibrations problems fixed. That's two sets of front and three trans mounts in 29 years, guess that's not too bad overall.
Anyway, check the engine and transmission mounts. Mine were in bad shape, typical of the AZ heat.
Anyway, check the engine and transmission mounts. Mine were in bad shape, typical of the AZ heat.
#2
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Join Date: Jul 2009
Location: Winter Garden Florida
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thank you for the write up, My drive shaft broke on me, and i bought a used one, the u joints seem fine but it's still vibrating pretty bad, i'll have to check the mounts
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