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Tranny shifting too hard with Hennesey tune
I have 2011 with a 445 max boost kit. Took a bit but I finally have the tune sorted out. Had to put 2012 plugs in my 2011 to handle the extra HP. My issue is the tranny. When getting after it in a downshift situation the shift is violently hard to the point I think something in the...- Rwood_devil
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- Replies: 9
- Forum: Generation 4 - General Discusson
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NEWB Hennessey Issue
I have a 2011 SHO and recently had a 445 max Boost installed by my local dealership. The performance is outstanding and the MPG is up a full 2 MPGs. Here's my problem: The car is making a wheezing (sounds like an owl hooting noise) when on or off the throttle. Hennesey has been very slow...- Rwood_devil
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- Replies: 9
- Forum: Generation 4 - Performance Upgrades
