# tumbling/viabrating at 3500-4000rpm **URL:** \ **Category:** Canada Nissan Automotive\ **Created:** [April 24, 2007, 12:47pm UTC](https://forums.speedlife.net/t/tumbling-viabrating-at-3500-4000rpm/133375 "2007-04-24T12:47:07Z")\ **Posts on this page:** 7\ **Page:** 1
**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, 12:47pm UTC](https://forums.speedlife.net/t/tumbling-viabrating-at-3500-4000rpm/133375/1 "2007-04-24T12:47:07Z")
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. its a 92 hatch. hicas was disconnected and a lock-bar was put on. ---
**Author:** ![renegade141](https://avatars.discourse-cdn.com/v4/letter/r/ba8739/32.png) [@renegade141](https://forums.speedlife.net/u/renegade141)\ **Post date:** [April 24, 2007, 10:01pm UTC](https://forums.speedlife.net/t/tumbling-viabrating-at-3500-4000rpm/133375/2 "2007-04-24T22:01:11Z")
i got the same problem too, S14 SR the rumble is most noticable at 100km/h-120km/h, after that its smooth yeh its the driveshaft. i haven’t fixed it yet…i’ll post up what i changed when i fix it… not anytime soon…lol ---
**Author:** ![Birdman12](https://avatars.discourse-cdn.com/v4/letter/b/cab0a1/32.png) [@Birdman12](https://forums.speedlife.net/u/Birdman12)\ **Post date:** [May 15, 2007, 8:51pm UTC](https://forums.speedlife.net/t/tumbling-viabrating-at-3500-4000rpm/133375/3 "2007-05-15T20:51:17Z")
turns out it was the downpipe and another part of the exhaust resting against the frame causing this vibrating, nothing like some heater hose and clamps cant fix! ---
**Author:** ![l2iceboy](https://avatars.discourse-cdn.com/v4/letter/l/35a633/32.png) [@l2iceboy](https://forums.speedlife.net/u/l2iceboy)\ **Post date:** [May 20, 2007, 6:52pm UTC](https://forums.speedlife.net/t/tumbling-viabrating-at-3500-4000rpm/133375/4 "2007-05-20T18:52:52Z")
hey, if the driveshaft is causing it, how bad is this problem? ---
**Author:** ![l2iceboy](https://avatars.discourse-cdn.com/v4/letter/l/35a633/32.png) [@l2iceboy](https://forums.speedlife.net/u/l2iceboy)\ **Post date:** [May 21, 2007, 1:39am UTC](https://forums.speedlife.net/t/tumbling-viabrating-at-3500-4000rpm/133375/5 "2007-05-21T01:39:03Z")
hmm ahh ok, are u-joints something i can buy aftermarket? or at canadian tire? lol candian tire ones trustworthy for the price? i ask because my car vibrates from 100-120ish only…is it hard to replace the u-joints? my mechanic isnt open till Tuesday so I’d like to know how serious this is as well as whether it is an easy job to do, thanks for theinput ---
**Author:** ![Hanzzzzz](https://avatars.discourse-cdn.com/v4/letter/h/3e96dc/32.png) [@Hanzzzzz](https://forums.speedlife.net/u/Hanzzzzz)\ **Post date:** [May 22, 2007, 6:09pm UTC](https://forums.speedlife.net/t/tumbling-viabrating-at-3500-4000rpm/133375/6 "2007-05-22T18:09:53Z")
it might be the tires or wheel bearings as well, so dont just assume its the u joint ---
**Author:** ![pcproa](https://avatars.discourse-cdn.com/v4/letter/p/c5a1d2/32.png) [@pcproa](https://forums.speedlife.net/u/pcproa)\ **Post date:** [May 22, 2007, 6:14pm UTC](https://forums.speedlife.net/t/tumbling-viabrating-at-3500-4000rpm/133375/7 "2007-05-22T18:14:09Z")
> [@How To Get Girls: 101](https://forums.speedlife.net/t/how-to-get-girls-101/1555/135): > > U-joints aren’t hard, unbolt the driveshaft from the transmission and the diff, and you should be able to unbolt the U-joints and bolt the new ones on. Check Crappy Tire, Napa, places like that. I’ve never personally changed the U-joints on a 240, but I’ve replaced them on a few other vehicles, and they’ve never been hard to do. It’s just a few bolts, and it involves crawling under your car. As far as I can remember, Nissan (and most import car manufacturer) driveshaft u-joints cannot be unbolted if they are from the factory. You must press the u-joint out and the aftermarket unit you purchase usually bolts in.