I run all poly mounts motor /trans with no problems..no vibrations in the shifter and i run a steeda shifter. I was thinking if your engine is tight and the crossmember is stiff then all of the vibration would be sent to the soft spot. My car has a small amount of vibration but it's not in the shifter or driveline..and that's normal when running poly mounts and bushing. My car handles well but the ride is almost too stiff.
I'm anxiously awaiting the results here. I doubt the flywheel is the issue. The weights are cast into the flywheel as far as I remember, I can't see this being an issue. The trans mounts is also something that I see as a non issue. The ujoints are suspect 1 to me and only take a half hour to swap out. This may seem a little crazy, but have your checked your pinon angle? If you have your pinion pointing to somewhat of an extreme and your ujoints are questionable it can cause some funky stuff back there. Just food for thought. I'm scratching to think of something beyond the obvious you've already looked for.
Damn dyno always breaking cars... I'll tell ya, lol
Damn dyno always breaking cars... I'll tell ya, lol
Just in case it should come up:
If the u-joints come out of this this thing as being the culprit, I would opt for the sealed (non-greasable) pieces. They have consistently been more reliable for me.
If the u-joints come out of this this thing as being the culprit, I would opt for the sealed (non-greasable) pieces. They have consistently been more reliable for me.
Rule #1 when troubleshooting is 'what changed?' and the very first sentence you say car ran great until after the dyno tune. So basically the tune is screwed up, the guy tuned it for peak hp numbers and ignored how it ran at the rest of the rpm range. Most likely spark timing or injector timing is goofed up. Mounts are fine, they dont create vibrations just help dampen it. Go back to the tuner or throw back in the stock tune and report back before you start ripping
Fair enough, just when I read this part of your opening post:
"Ok so I put my car together as most know it was great I ran it almost 200 miles everything was awesome . Had the car tuned and after the dyno we now have a vibration that comes on about 2200 rpm and up and I get a nasty rattle in the shifter area . "
It definitely points me towards the tune.
That said, I don't know what your vibe 'feels' like. It seems like it's speed independent, happens at specific RPMs, moving or still, can you clarify that ?
The tune could affect the timing, injector timing and air/fuel ratio all that can cause 'vibrations' of sort, so I still wouldn't rule it out based on what I've read here.
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