Greetings Everyone,
I would like your help regarding an issue that i'm facing on my 05 Trailblazer LT, I'm hearing a barely noticeable grinding/rattling noise whenever it reaches ~2800 RPM or slightly blow that especially before shifting into 3rd gear (slight delay on my 3rd gear) i don't hear it when shifting into 2nd mainly because it doesn't reach 3000 RPM usually shift around 2000 RPM at normal acceleration, you definitely can not hear it outside the car and seems to be coming off the driver side. what is strange though that you start the car while it's cold and let the RPM settle then give it a couple of revs or holding the RPM up to 2800-3000 RPM it doesn't show but driving for an hour or maybe less it'll come back again and stays even after parking and trying to hold the RPM at 2800-3000 RPM i can still hear it clearly but can't determine where exactly other than it seems to be coming from somewhere in the engine bay left driver side in particular, i had suspicion that it could be coming off the transmission but i went under it with someone in car and i couldn't hear it.
Sometimes it goes away by itself and couldn't hear it when shifting into 3rd gear it seems to be more RPM related than shift related since if i did a slow acceleration my 3rd gear would shift below 2500 RPM and wouldn't hear that noise it only happens when accelerating and reaching around 2800-3000 RPM mark and continues even after putting it into PARK it'll still be there for awhile until it cools off.
Sorry for the long thread i tried to be as detailed as possible, I would really appreciate any suggestions or tips to help me eliminate the transmission as a probable cause and track it down.
I would like your help regarding an issue that i'm facing on my 05 Trailblazer LT, I'm hearing a barely noticeable grinding/rattling noise whenever it reaches ~2800 RPM or slightly blow that especially before shifting into 3rd gear (slight delay on my 3rd gear) i don't hear it when shifting into 2nd mainly because it doesn't reach 3000 RPM usually shift around 2000 RPM at normal acceleration, you definitely can not hear it outside the car and seems to be coming off the driver side. what is strange though that you start the car while it's cold and let the RPM settle then give it a couple of revs or holding the RPM up to 2800-3000 RPM it doesn't show but driving for an hour or maybe less it'll come back again and stays even after parking and trying to hold the RPM at 2800-3000 RPM i can still hear it clearly but can't determine where exactly other than it seems to be coming from somewhere in the engine bay left driver side in particular, i had suspicion that it could be coming off the transmission but i went under it with someone in car and i couldn't hear it.
Sometimes it goes away by itself and couldn't hear it when shifting into 3rd gear it seems to be more RPM related than shift related since if i did a slow acceleration my 3rd gear would shift below 2500 RPM and wouldn't hear that noise it only happens when accelerating and reaching around 2800-3000 RPM mark and continues even after putting it into PARK it'll still be there for awhile until it cools off.
Sorry for the long thread i tried to be as detailed as possible, I would really appreciate any suggestions or tips to help me eliminate the transmission as a probable cause and track it down.