Can this be corrected?...

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May 20, 2005 | 10:05 PM

1999 Vette

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Instructor

Joined: Feb 2005

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From: IL

Can this be corrected?...

I have 3.90s & TC (Its an A4) and know that the engine revs higher because of the gears...

My question is: at 2K rpms and at 3K rpms (80 mph) the engine revs fine and the cabin noise is fine...BUT at 2500 rpms (approx 70 mph) AND ONLY at 2500 rpms the engine revs much higher and is much louder in the cabin. It seems like its in the wrong gear (but what do I know) and when I push it to 80+ MPH at 3K rpms its much better AND quieter!

Can this be corrected?

May 21, 2005 | 01:10 AM

runamuk

Le Mans Master

Joined: Jul 2002

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From: Slave to the evil empire

Cruise-In V Veteran

St. Jude Donor '04

Sounds like the torque converter might be unlocking, check your programming.

May 21, 2005 | 09:26 AM

90 droptop

Melting Slicks

Joined: Aug 2000

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Quote:

Originally Posted by runamuk

Sounds like the torque converter might be unlocking, check your programming.

But it's strange that it would only do it at that certain rpm. Is the tach climbing a few hundred rpm? What exhaust do you have?

May 21, 2005 | 10:01 AM

lost

Drifting

Joined: Jul 2002

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From: Spring Tx

Out of curiosity, what exhaust do you have on it?2500 is the approximate rpm when drone becomes a major factor.

May 21, 2005 | 10:33 AM

1999 Vette

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Instructor

Joined: Feb 2005

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From: IL

Borla Exhaust. By the way, it was tuned after the gears & TC install.

I was told something about "drone" but didn't fully understand.

Is there something the tuner should check for?

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