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The mkiv Supra Owners Club

New autobox = louder car!


RedM

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As has been documented I had a refurbed autobox installed last week. Since then I swear exhaust is louder. It's more noticeable at lower speeds. I thought it was just me but a colleague has commented on how loud it is now. :blink:

 

Why would this be?

 

I'm also hearing more of that fluttery sound when you start to boost and then lift off. Not a BOV noise more of a fluttery sound.

 

Again, why?

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I'm not sure they would have had to move the box TBH. Had a look under the car with them when I picked it up. It came close but I reckon it was an easy out job.

 

Also, the sound is definitely coming from the back box not from anywhere else.

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Daft question then. What's the best way to tell? Just listen for exhaust noise from the wrong area? Look for smoke from around the joints?

 

It's a bit tricky to do at home (especially for us 'larger' blokes). You'll need to get it on a proper ramp, get a mate to cover the end of the exhaust and listen for any air escaping from the joints (it'll be very obvious if there is a problem).

 

I usually just go to my local tyre and exhaust place for stuff like this, they have all the kit to diagnose and fix things like this in no time.

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I took the car to a one of the exhaust places. They had a thorough look all around but were adamant there is nothing wrong.

 

So, either, the car just sounds healthier following the box swap, cambelt swap, aux belt swap etc or I'm imagining it.

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