High pitched noise just before shifting - Page 2 - Chevy TrailBlazer, TrailBlazer SS and GMC Envoy Forum

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Go Back   Chevy TrailBlazer, TrailBlazer SS and GMC Envoy Forum > 2006 - 2009 TrailBlazer SS Tech > 06-09 SS Engine and Drivetrain > Transmission Mods

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Old 02-11-2014, 11:43 PM
cjdiaz1024's Avatar
cjdiaz1024 cjdiaz1024 is offline
Junior Member
2002 Chevy TrailBlazer LS
Pewter Metallic 4.2L I6 2WD
Join Date: Nov 2012
Location: Miami, FL
Posts: 32
Originally Posted by vetruck View Post
I've been hearing a high pitched noise just before shifting during semi aggressive driving (shifting around 4K). I can only hear it with the radio down. Anyone else experience this? Is it normal or could it mean a possible problem is starting. May be nothing, I'm a little paranoid about the tranny lately (I wonder why )
I know this post is 8 years old, but I started to notice the same exact sound you were experiencing as well.

Here is a video of the sound I experience, maybe it's the same as yours:

Have you found any answers to what this is?
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