Actually a serious post.
My bronco makes a pretty noticeable whirring/wizzing sound right after startup and it seems to be mostly when in first gear. It’s a new sound and it coincided with a swap to my flex plate. it’s sort of a high pitched whir/wiz like a big gear spinning or a belt making a zzzzzzz sound.
My bronco ran well, no high pitched wizz/gear spin sound prior to this work being done. I know it’s a hard question to ask without hearing it but.. is this normal? I think it’s not since i’ve owned two broncos and only this one makes this weird and annoying sound. But my 69 bronco with the c4 didn’t wizzz like this and this 74 bronco didn’t use to sound like that either.
here’s what happened.
I converted from 3 speed manual to AOD no problem no strange sounds.
ran for a couple years with no problem but then had a starter malfunction.. stripped starter gears... no problem - i swapped in a new starter.. that one couldn’t engage properly.. could have been a bad starter but... I felt the edges of the flexplate and I thought some of the teeth felt rough so I decided to swap the flexplate and put a new/3rd starter in.
engine runs fine but this loud whine/wizz sound is present in low
gears and eventually as the engine is warm and I drive for a while it’s less noticeable .
to me it sounds likes it’s coming from the area near the flexplate and not the belts. I also don’t think it’s the belts because long after it started this sound, I swapped all the pulleys and belts for new when I did the recent timing chain cover and gasket job and the sound is present before and after this belt and pulley swap.
i know this is hard to debug without hearing it. i’ll try to capture the sound but i’m not sure my iphone will really pick it up.
Truth is that I don’t really trust the shop that did the flexplate job for me so I am suspicious of it and i’m wondering if anyone else has had similar issues.
this is a 302 with an AOD and the advanced adapters coupling.
the flex plate I used was the one in the picture below and summit link.
https://www.summitracing.com/parts/sum-g111sfi
I thought maybe just this flexplate has some weird acoustical characteristics.. maybe a different flexplate wouldn’t sound like that..
or someone did something wrong on the install. flexplates are cheap but the labor to put one in is not...
I think it was the correct plate for the AOD.
i’m looking for ideas.
maybe this?
Whining Torque Converter? —- the internet says - The most common issue with torque converters is damaged or worn out needle bearings, which arises due to low transmission fluid levels. If these needle bearings need to be serviced you will often hear a loud whizzing or grinding noise while your vehicle is in gear, but not when in neutra
My bronco makes a pretty noticeable whirring/wizzing sound right after startup and it seems to be mostly when in first gear. It’s a new sound and it coincided with a swap to my flex plate. it’s sort of a high pitched whir/wiz like a big gear spinning or a belt making a zzzzzzz sound.
My bronco ran well, no high pitched wizz/gear spin sound prior to this work being done. I know it’s a hard question to ask without hearing it but.. is this normal? I think it’s not since i’ve owned two broncos and only this one makes this weird and annoying sound. But my 69 bronco with the c4 didn’t wizzz like this and this 74 bronco didn’t use to sound like that either.
here’s what happened.
I converted from 3 speed manual to AOD no problem no strange sounds.
ran for a couple years with no problem but then had a starter malfunction.. stripped starter gears... no problem - i swapped in a new starter.. that one couldn’t engage properly.. could have been a bad starter but... I felt the edges of the flexplate and I thought some of the teeth felt rough so I decided to swap the flexplate and put a new/3rd starter in.
engine runs fine but this loud whine/wizz sound is present in low
gears and eventually as the engine is warm and I drive for a while it’s less noticeable .
to me it sounds likes it’s coming from the area near the flexplate and not the belts. I also don’t think it’s the belts because long after it started this sound, I swapped all the pulleys and belts for new when I did the recent timing chain cover and gasket job and the sound is present before and after this belt and pulley swap.
i know this is hard to debug without hearing it. i’ll try to capture the sound but i’m not sure my iphone will really pick it up.
Truth is that I don’t really trust the shop that did the flexplate job for me so I am suspicious of it and i’m wondering if anyone else has had similar issues.
this is a 302 with an AOD and the advanced adapters coupling.
the flex plate I used was the one in the picture below and summit link.
https://www.summitracing.com/parts/sum-g111sfi
I thought maybe just this flexplate has some weird acoustical characteristics.. maybe a different flexplate wouldn’t sound like that..
or someone did something wrong on the install. flexplates are cheap but the labor to put one in is not...
I think it was the correct plate for the AOD.
i’m looking for ideas.
maybe this?
Whining Torque Converter? —- the internet says - The most common issue with torque converters is damaged or worn out needle bearings, which arises due to low transmission fluid levels. If these needle bearings need to be serviced you will often hear a loud whizzing or grinding noise while your vehicle is in gear, but not when in neutra
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