# Tumbling/viabrating at 3500-4000rpm

**URL:** <https://forums.speedlife.net/t/tumbling-viabrating-at-3500-4000rpm/105860>\
**Category:** SON240sx Automotive\
**Created:** [April 24, 2007, 7:32am UTC](https://forums.speedlife.net/t/tumbling-viabrating-at-3500-4000rpm/105860 "2007-04-24T07:32:38Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![Birdman12](https://avatars.discourse-cdn.com/v4/letter/b/cab0a1/32.png) [@Birdman12](https://forums.speedlife.net/u/Birdman12)\
**Post date:** [April 24, 2007, 7:32am UTC](https://forums.speedlife.net/t/tumbling-viabrating-at-3500-4000rpm/105860/1 "2007-04-24T07:32:38Z")

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Hey ive noticed that when i get up to about 3500-4000 it feels like the driveshaft is about to fall off or something there is this crazy rumble/tumble kind of sound and feeling comming from near the back of the car. It’s especially bad when im on the highway because cruising speed is withing 3300-4000rpm for me on my sr20.

so any ideas? a couple friends said it might be the driveshaft mount or something or even a twisted driveshaft? it runs smooth in all rpm ranges except between around 3500-4000rpm. thanks.

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<div class="post-metadata">

**Author:** ![Birdman12](https://avatars.discourse-cdn.com/v4/letter/b/cab0a1/32.png) [@Birdman12](https://forums.speedlife.net/u/Birdman12)\
**Post date:** [April 24, 2007, 12:52pm UTC](https://forums.speedlife.net/t/tumbling-viabrating-at-3500-4000rpm/105860/2 "2007-04-24T12:52:27Z")

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its a 92 hatch, hicas was disconnected and locked.

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<div class="post-metadata">

**Author:** ![Birdman12](https://avatars.discourse-cdn.com/v4/letter/b/cab0a1/32.png) [@Birdman12](https://forums.speedlife.net/u/Birdman12)\
**Post date:** [April 24, 2007, 7:32am UTC](https://forums.speedlife.net/t/tumbling-viabrating-at-3500-4000rpm/105860/3 "2007-04-24T07:32:38Z")

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Hey ive noticed that when i get up to about 3500-4000 it feels like the driveshaft is about to fall off or something there is this crazy rumble/tumble kind of sound and feeling comming from near the back of the car. It’s especially bad when im on the highway because cruising speed is withing 3300-4000rpm for me on my sr20.

so any ideas? a couple friends said it might be the driveshaft mount or something or even a twisted driveshaft? it runs smooth in all rpm ranges except between around 3500-4000rpm. thanks.

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<div class="post-metadata">

**Author:** ![Birdman12](https://avatars.discourse-cdn.com/v4/letter/b/cab0a1/32.png) [@Birdman12](https://forums.speedlife.net/u/Birdman12)\
**Post date:** [April 24, 2007, 12:52pm UTC](https://forums.speedlife.net/t/tumbling-viabrating-at-3500-4000rpm/105860/4 "2007-04-24T12:52:27Z")

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its a 92 hatch, hicas was disconnected and locked.