1995 gsx vibration while driving

[Sustaplex 325]

Hi everyone.. I need some trouble shooting help. I have a 95 gsx with a 6 bolt swap with stock suspension. My problem I'm having is that it vibrates while I'm driving it. The weird thing is that it doesn't really do it in 1st 2nd and hardly at all in 5th. 3rd and 4th do it really bad. I've checked everything out on it suspension wise, tie rods, control arms, cv axles and so on. Haven't checked the drive line or carrier bearings? But I'm not sure that would do it.


Any ideas will help. I'm hoping maybe someone else has had this problem and will kno what it is. Thanks guys for the help.

 

[laser90]

Maybe your tires need to be balanced.

 

[3parks]

Maybe your tires need to be balanced.

That'd be my guess. Maybe somehow you knocked a wheel weight off one wheel? Mine did the same thing when this happened. I could only feel the wheel shake at speeds around 60-75ish

 

[95tsiemad]

carrier bearings. See if you have alot play in your drive shaft.

 

[Sustaplex 325]

Ya a wheel weight could have came off. I never thot of that.. but would it really vibrate bad if it was out of balance? Also if I'm in 5th its not to bad or can barely feel it. But as soon as I drop it down in forth or fifth it gets ridiculous .. THE VIBRATION FEELS LIKE YOUR GOING 20 MPH BUT HAVE IT IN 4TH OR 5TH GEAR...that's the best description I can give. I haven't checked the carrier bearings yet. But will soon. When I head up to where my car is next weekend..

 

[3parks]

Yes, losing a wheel weight can cause major vibration but is speed relative usually. Your problem seems to be with the gear you are in or rpm and not speed right? If so it's not going to be a wheel weight.

 

[Sustaplex 325]

Ya if I'm in 5th.. u don't feel it much at all..but when I need to shift down into 4th its real bad.. and it feels like its more towards the back. There have been times when it wasn't to bad and other times worse. Would front carrier bearings do this? There r front and rear carrier bearings if I'm not mistaken? Thanks for all the good replies guys

 

[greyspyder117]

Is the vibration in the steering wheel or in your seat. CAn you see you hands shake while driving. Or do you just feel it in your butt while driving?? Hand shakes = front of car..... Butt shakes = rear of car... It's not always that simple but it's a place to start

 

[Sustaplex 325]

hmm.. it feels like its the whole car not in the steering wheel.. to me and my friend we think it feels exactly like if you were to a corner and instead of going down through the gears, you jus kept it in third or second when it needed to be in first.. you kno what i mean by that right.. so the car gets rowdy cause u got it in third but ## only going 10 mph?? well thats what it feels like to us without the jerkyness if u were to do that.. i hope im making sense .. im trying to give good examples.. cause i wanna figure this out..its driving me crazy.. thanks again guys for hanging in there being nice and giving good info... some people on here are mean as...well you kno..

 

[import_fantasy]

Yea sounds to me like u-joint or carrier bearing. Both a easy check and easy fix.

 

[Sustaplex 325]

ya thats what i was thinking.. how can u check if its a u-joint... ive heard of alot of different ways?

 

[import_fantasy]

Simple just turn the driveshaft back and forth and look for play in the u-joints individually. If everything moves together and its not sloppy then there fine. They usually fail one at a time, not all together.

 

[stuckwithgsx]

Rear diff? Input shaft? Throw out bearing? I don't see the throw out bearing being the problem but i slight possibility. Any sounds with the vibration? That would help pinpointing the area.

 

[jtmcinder]

The OP talks about gear-specific vibration. Why are you all responding in terms of things that don't depend on what gear he is in? Shouldn't someone be directing him to the shop manual to see what, if any, transmission shafts 3rd and 4th have in common?

 

[import_fantasy]

He would feel it in the shifter also if it was a gear specific problem.

 

[jtmcinder]

Hm. His first post said it was specific to two gears and I asked if there was a shaft inside the transmission that is unique to those two gears.

If it's prop-shaft etc related, then it will be speed-dependent. The thread-starter should find a speed in fourth that produces the vibration and then shift to fifth and stay at that speed. If it's post-tranny, then the vibration will be there. If it's in the tranny, as I've suggested, it will disappear.

 

[Sustaplex 325]

Ill check the driveshaft as soon as I can..
Yes I did say something about the gears. It does it all the time tho but 3rd and 4th are so bad I don't wanna be going that speed to be in those gears.
There is no sound from the vibration
Also the gearbox is smooth
U all have great ideas..thanks

 

[96talon4g63]

I'm guessing your mounts are still good because my tranny mount wore out once and caused a lot of vibrating

 

[Sustaplex 325]

I'm guessing your mounts are still good because my tranny mount wore out once and caused a lot of vibrating

was the vibration like mine or constant

 

[jtmcinder]

It does it all the time tho but 3rd and 4th are so bad I don't wanna be going that speed to be in those gears.

Ah. My misunderstanding. So, it's speed-related and the speed at which the vibration hits its natural frequency is one that corresponds to 3rd and 4th gears. Got it.

2G carriers bearings on the prop shaft are always suspect. Get under there and start yanking.

 

[stuckwithgsx]

I think we're all having a misunderstanding. Is this speed related? RPM related? Gear related? Partial or Full throttle related? Under boost or not under boost or both? I'm sure you have answered these previous, but can you please update all information? Also how extensive have you tested things? Have you mashed the throttle to see if it changes anything? Or are you just babying until you figure it out? My personal opinion so far is a carrier bearing or u-joint. Something from transmission back, in my experience if it was anywhere up front it would affect steering wheel. And i've never had 2 gears go bad and cause this type of problem, but i would assume that if it was inside of the transmission it would affect the front wheels as well as the back, meaning you'd feel it in the steering wheel. Hope this helps.

 

[jamezbennihanna]

Sounds like a speed related problem I'd check your carriers and u joints best of luck with your problems.

 

[SrKegler]

Ah. My misunderstanding. So, it's speed-related and the speed at which the vibration hits its natural frequency is one that corresponds to 3rd and 4th gears. Got it.

2G carriers bearings on the prop shaft are always suspect. Get under there and start yanking.

I think you were right the first time. The way I understand it, he can be doing 50mph in 5th and things are OK. However when he downshifts to 50mph in 4th, the vibration starts. The only thing that really changed was the engine speed. Drive train speed is still constant. Sounds more like something on the 3-4 shafts.

 

[Sustaplex 325]

hey everyone.. ill be going up to where my car is this weekend so hopefully ill figure things out from all the good info everyone has given me on here.. you all are greatly appreciated.. One more thing before i go up and check it out.. i forgot to add that the vibration only occurs when im on the gas.. it stops as soon as i let off the gas.. i havent drove it in about a month cause ive been doing work to it.. new lifters,bov, ecm link, tune, 880 cc injectors, fp exhaust manifold, new intake manifold, throttle body, tps, and driver side outer tie rod.. ill be finishing up all that this weekend with my buddy will. let me kno if adding the throttle response helps the troubleshooting.. im sure i just need to check the u-joints and carrier bearings tho.. thanks again everyone