Fidanza users

[9T1 Red ZR1]

I have a question for anyone using the Fidanza flywheel. I get a slight vibration/rattle from my transmission in only 5th or 6th gear when the RPMs are between about 1500 to 2000. Once above about 2000 rpm, it goes away and in any other gear in that RPM range, there is no vibration. I have C-beam plates and the torque is correct on them. Is this something anyone else has? Suggestions if it shouldn't be happening?


Thanks,
Bill

[XfireZ51]

Originally Posted by 9T1 Red ZR1

I have a question for anyone using the Fidanza flywheel. I get a slight vibration/rattle from my transmission in only 5th or 6th gear when the RPMs are between about 1500 to 2000. Once above about 2000 rpm, it goes away and in any other gear in that RPM range, there is no vibration. I have C-beam plates and the torque is correct on them. Is this something anyone else has? Suggestions if it shouldn't be happening?


Thanks,
Bill

No I don’t get any vibration at any time other than stopped in neutral.
What trans fluid are using?
Is this happening at steady cruise or during accel/decel?

[mgbrv8]

I don't get vibration just a noise(slight rattle) at idle because the dual mass isn't there to dampen it out anymore

Dave

[9T1 Red ZR1]

I am using the Amsoil fluid in the transmission. It only happens when accelerating. it goes away as soon as I let off of the gas. It's funny, there is almost no rattle at idle in neutral. I forgot to mention, I have the Hurst shifter.

[Paul Workman]

Originally Posted by 9T1 Red ZR1

I am using the Amsoil fluid in the transmission. It only happens when accelerating. it goes away as soon as I let off of the gas. It's funny, there is almost no rattle at idle in neutral. I forgot to mention, I have the Hurst shifter.

We've both got Fidanza FWs in our Zs. Like Dom, except for idling in neutral, no rattling at any speed/load condition.

You mentioned a Hurst shifter. Tho completely different from a ZF shifter, but THAT or something related to the shifter sounds very similar to what I experienced with a shifter on a '69 SS Malibu: worn bushings rattled under heavy loads. Furthermore, it sounds like there is a resonant frequency - more evidence of something loose (but pretty sure it's NOT the FW). I think I'd look at the shifter and the C-beam bolts/plates first.

[9T1 Red ZR1]

Thanks for the replies. I will look into the items you suggested.


Bill

[XfireZ51]

BTW, I have a Hurst shifter and Intake/Exhaust cams.

[Vette73]

I get the typical noise up until around 2,300 RPM......Sometimes it sounds like an electric saw as I am accelerating......In sixth gear at the RPM you specified,it sounds like a motor boat......I just leave it in fifth for that matter if I'm doing 60-65....

Car has obx headers and exhaust .....Car is fully ported with intake cams...

Sent from my LG-TP260 using ZR-1 Net Registry mobile app

[XfireZ51]

Originally Posted by Vette73

I get the typical noise up until around 2,300 RPM......Sometimes it sounds like an electric saw as I am accelerating......In sixth gear at the RPM you specified,it sounds like a motor boat......I just leave it in fifth for that matter if I'm doing 60-65....

Car has obx headers and exhaust .....Car is fully ported with intake cams...

Sent from my LG-TP260 using ZR-1 Net Registry mobile app

Are u describing the Fidanza or exhaust drone?

[Vette73]

Originally Posted by XfireZ51

Are u describing the Fidanza or exhaust drone?

The fidanza I have noise until like 2,300 RPM,after that it goes away.......Sixth gear is def. the exhaust drone....

Sent from my LG-TP260 using ZR-1 Net Registry mobile app