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06 sts4
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1 Posts
Discussion Starter #1
My sts4 is downshifting hard when coming to a stop sign
It is accompanied by thunk kinda noise
Any thoughts
 

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(1971 Ford Mach 1) 1995 STS + 2006 STS-V
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30 Posts
I had the same type of problem. Did yours just start doing it or you always had the hard down shift? I had the problem since I owned the car. I had the dealer update the Vehicle Calibration for the transmission and it solved the problem. I had the dealer update all the Calibrations while they had it.
 

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'10 CTS4 3.6L Wagon prem; '06 STS 3.6L base; '98 Seville STS
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2,341 Posts
Rear differential front bushing...creative steel. Mine Was doing the same thing, stopped after the bushing was changed
 
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