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Transmission Mount?


99svtvenom

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Hey guys I have been doing alot of reading and finding alot of information about bad tranny mounts on the ls400's. I've got a 98 ls400 with about 80k on it and was curious to see if a bad transmission mount could cause a grinding sound under acceleration and its really bad going up any type of hill. It sounds like its coming from right underneath the seats and sometimes is worse than other times. Any ideas?

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Try taking a look under the car. The Tranny mount is at the rear of the transmission. the rubber should be supple and the metal brackets should not contact each other. It is pretty cheap anyway so you might as well change it while you've got the car jacked up. Just remember to support the tranny with a smaller jack placed carefully so as not to bend the trans oil pan. 98 is a good year, got the 5 speed and vvti. Fast. Grinding under torque might mean an engine mount as it theoretically might allow the engine to lift on one side and allow metal to metal contact on the engine mount.

Yo

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