After racing an rx7 from a roll, my buddies boosted si vibrates really bad under acceleration. Its hard to tell if it is coming from the passenger side or driver side, but he has changed the ball joint and axle on the passenger side. Also changed the wheel and made sure the lugs were tight so we can also rule this out.

Has anyone had any similar experiences? He is pretty frustrated with it. It only happens under 20 percent throttle or more. The rpm doesnt really matter, just as long as its under load it shakes madly. He can be at 6k rpm in neutral and no shaking, but at 3k at 100 percent throttle and its starting to really shake. Could it be the motor mounts because the tilting of the motor under load? Any help is really appreciated guys.

 

sounds exactly like what happens to me...been doing it for about 1 1/2 years now...i've pretty much ruled it out to be the driver's side axle, but been to lazy to do anything about it...i'll most likely be swapping it out anyway when i finish my engine build next month....but it shakes the worst at around 60mph under acceleration, but if u push in the clutch and cruise in neutral, it doesn't shake...

 

motor mounts? unlikely...but...you racers like to launch hard from stops, tearing these apart.

 

Same problem I have.. I'm pretty sure my problem is either the intermediate shaft (tripod+bearing) or the actual driver's side halfshaft.

 

I had same problem awile back. It turned out to be the drivers side axle. For some reason the drivers side axle is always first to go. Get under the car and see if the axle boot is leaking grease, if it is then its you axle.

 

Check your intermediate shaft. This has happened to be for a long time while I had my b16a/crx.. Same problems like your describing..

-Van

 

THanks guys, I'm the guy thats car is vibrating like a ****. I'll check the drivers side axle and intermediate shaft tonite. Thanks again.

 

how would check half shaft. on my h23 its just a steel bar. mines doing the same thing on the interstate.

 

Alot of times you won't see much via Visual inspection... SO..... hard to
determine which component is bad.. so unless you can do it yourself,
pay to get both changed out.

 

i can do axles tahts easy. just a matter of buying new ones... no money

 

Good thing my brother's car is down rebuilding....all his **** is in my garage so i was gonna just borrow his intermediate shaft and/or axle for a few mins