Vibration in 4th under hard acceleration? - Page 2 - EvoXForums.com

dboz · 10-08-2012, 04:56 PM

Nah, ACT clutch, not abused at all. This did it on the stocker also.

dboz · 10-08-2012, 04:57 PM

Quote:

Originally Posted by vegittoss15

You think this is maybe related to what you saw with mine yesterday?

What did he see??

vegittoss15 · 10-08-2012, 05:04 PM

Well, more like felt. I've been saying I feel like sometimes I feel a vibration when accelerating HARD. If it's part throttle it's fine. But, I just got coilovers which could be just making me feel the shitty NJ roads more. Keeping an eye on the tach, no slip under WOT, and the speed still climbs very well. Did it *just* start for you?

dboz · 10-08-2012, 05:51 PM

No, been there for a long time. Just starting to bug me more since I don't know what it is? Exact symptoms as you though.

01cbr929 · 10-08-2012, 06:04 PM

Sounds like tune related.... Did it happen after some mods or tune?

dboz · 10-08-2012, 06:07 PM

No, it does it anytime regardless of weather. I thought it may be tune as well......see first post. It would seem to me though, that tune is basically RPM related, so why smooth in third revving vs. rough in 4th revving? Engine should not know the difference?? This is what makes me think transmission. Gear is too steep or load is too much or drive line vibration in fourth?

Like the other guy said, at partial throttle, no issues at all.

illmatic209 · 10-08-2012, 06:20 PM

When did u put in ur new clutch? Did you put in a new flywheel or used ur old one? If ur using ur old flywheel it could be the flywheel from the wear, hot,uneven spots.
Mine did the same thing till I installed a new flywheel

Sent from my SCH-I535 using AutoGuide.Com Free App

dboz · 10-08-2012, 06:26 PM

Well, I did reuse the stock flywheel......SHEP TRANS did it about 18 months ago (resurface flywheel) and saw no issues with the flywheel.

Still not sure why 4th only and not third? You thinking fourth is creating more resistance and causing vibration? I know a guy with the original stock clutch and flywheel and his does the same thing? This made me think possible drive line vibration? I thought about swapping bushings but won't that just bring more vibration and noise into the car?

Also, what about motor mount? Shudder under the heavier load and more resistance causing it to resonate under strain?

I have no RPM rise from slip, if that is what you are thinking?

illmatic209 · 10-08-2012, 06:30 PM

Can u tell where the vibration is coming from? Like left side or under u?

dboz · 10-08-2012, 06:31 PM

Quote:

Originally Posted by illmatic209

Can u tell where the vibration is coming from? Like left side or under u?

Seems to me to come under me or slightly in front of me. Feels center located though.

10-08-2012, 04:56 PM	#11
dboz Forum Lackey Join Date: Jun 2010 iTrader: (0) Posts: 3,803	Nah, ACT clutch, not abused at all. This did it on the stocker also. __________________ Clipse3GT Tune, Buschur Racing CAI/Crossflow CBE, VIBRANT resonator, Mil.SPEC 100 HFC, AEM wideband/ boost gauges, SpeedCircuit UICP, GM 3port, Kidney Thief shift boot, Swift Sport Mach springs, XXR 527's, lots of Venture Shield, OEM side window vents, Recaro VIVO kids seats, Magnus CMC upgrade, ACT HDSS ME1 clutch, HOEN fogs, SHEP TRANS diff pin upgrade, Rally Armor mud flaps, HKS Limited Edition oil cap, WORKS short throw and bushings, AMS gear selector bushing, MITSU DSM leather shift knob

10-08-2012, 05:51 PM	#14
dboz Forum Lackey Join Date: Jun 2010 iTrader: (0) Posts: 3,803	No, been there for a long time. Just starting to bug me more since I don't know what it is? Exact symptoms as you though. __________________ Clipse3GT Tune, Buschur Racing CAI/Crossflow CBE, VIBRANT resonator, Mil.SPEC 100 HFC, AEM wideband/ boost gauges, SpeedCircuit UICP, GM 3port, Kidney Thief shift boot, Swift Sport Mach springs, XXR 527's, lots of Venture Shield, OEM side window vents, Recaro VIVO kids seats, Magnus CMC upgrade, ACT HDSS ME1 clutch, HOEN fogs, SHEP TRANS diff pin upgrade, Rally Armor mud flaps, HKS Limited Edition oil cap, WORKS short throw and bushings, AMS gear selector bushing, MITSU DSM leather shift knob

10-08-2012, 06:04 PM	#15
01cbr929 Just Spooling Up Join Date: Nov 2010 iTrader: (50) Location: Nashville, TN Posts: 151	Sounds like tune related.... Did it happen after some mods or tune? __________________ CBRD 33rb, Buschur Engine, 4.28 final drive, exedy triple, Robi Spec KW's.... just to name a few. Slow. Last edited by 01cbr929; 10-08-2012 at 06:18 PM.

10-08-2012, 06:07 PM	#16
dboz Forum Lackey Join Date: Jun 2010 iTrader: (0) Posts: 3,803	No, it does it anytime regardless of weather. I thought it may be tune as well......see first post. It would seem to me though, that tune is basically RPM related, so why smooth in third revving vs. rough in 4th revving? Engine should not know the difference?? This is what makes me think transmission. Gear is too steep or load is too much or drive line vibration in fourth? Like the other guy said, at partial throttle, no issues at all. __________________ Clipse3GT Tune, Buschur Racing CAI/Crossflow CBE, VIBRANT resonator, Mil.SPEC 100 HFC, AEM wideband/ boost gauges, SpeedCircuit UICP, GM 3port, Kidney Thief shift boot, Swift Sport Mach springs, XXR 527's, lots of Venture Shield, OEM side window vents, Recaro VIVO kids seats, Magnus CMC upgrade, ACT HDSS ME1 clutch, HOEN fogs, SHEP TRANS diff pin upgrade, Rally Armor mud flaps, HKS Limited Edition oil cap, WORKS short throw and bushings, AMS gear selector bushing, MITSU DSM leather shift knob Last edited by dboz; 10-08-2012 at 06:18 PM.

10-08-2012, 06:20 PM	#17
illmatic209 Member Join Date: Apr 2012 iTrader: (0) Location: Stockton CA Posts: 34	When did u put in ur new clutch? Did you put in a new flywheel or used ur old one? If ur using ur old flywheel it could be the flywheel from the wear, hot,uneven spots. Mine did the same thing till I installed a new flywheel Sent from my SCH-I535 using AutoGuide.Com Free App __________________ Mods AEM Cai, Spec 2+, Act streetlite Fw. More to come.

10-08-2012, 06:26 PM	#18
dboz Forum Lackey Join Date: Jun 2010 iTrader: (0) Posts: 3,803	Well, I did reuse the stock flywheel......SHEP TRANS did it about 18 months ago (resurface flywheel) and saw no issues with the flywheel. Still not sure why 4th only and not third? You thinking fourth is creating more resistance and causing vibration? I know a guy with the original stock clutch and flywheel and his does the same thing? This made me think possible drive line vibration? I thought about swapping bushings but won't that just bring more vibration and noise into the car? Also, what about motor mount? Shudder under the heavier load and more resistance causing it to resonate under strain? I have no RPM rise from slip, if that is what you are thinking? __________________ Clipse3GT Tune, Buschur Racing CAI/Crossflow CBE, VIBRANT resonator, Mil.SPEC 100 HFC, AEM wideband/ boost gauges, SpeedCircuit UICP, GM 3port, Kidney Thief shift boot, Swift Sport Mach springs, XXR 527's, lots of Venture Shield, OEM side window vents, Recaro VIVO kids seats, Magnus CMC upgrade, ACT HDSS ME1 clutch, HOEN fogs, SHEP TRANS diff pin upgrade, Rally Armor mud flaps, HKS Limited Edition oil cap, WORKS short throw and bushings, AMS gear selector bushing, MITSU DSM leather shift knob Last edited by dboz; 10-08-2012 at 06:29 PM.

10-08-2012, 06:30 PM	#19
illmatic209 Member Join Date: Apr 2012 iTrader: (0) Location: Stockton CA Posts: 34	Can u tell where the vibration is coming from? Like left side or under u? __________________ Mods AEM Cai, Spec 2+, Act streetlite Fw. More to come.

Remove Advertisements Sponsored Links
Evo X Forums Advertisement

Thread Tools
Show Printable Version Email this Page
Display Modes
Linear Mode Switch to Hybrid Mode Switch to Threaded Mode

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Swerving after hard hard braking?	jadyer	Evo X Wheels, Suspension & Brakes	11	08-20-2012 08:37 PM
Wierd vibration - help please	Jandonian	Evo X General	2	09-28-2011 04:20 PM
Check SST under hard acceleration.	thrlskr	SST	21	09-23-2011 02:21 AM
Hard turns or hard brakes, warning light with exclamation mark. What gives?	LVSBB6	Evo X General	7	12-24-2010 02:17 AM
Pulling to the right on hard acceleration.... what do you think it is?	KARo7	Evo X Wheels, Suspension & Brakes	37	07-21-2010 02:36 AM