it has to be from the lack of the bearing on the output shaft. We have installed several but our source is having a hard time getting us more. We tried sourcing parts but no luck.
install is a breeze once you remove the exhaust and drieshaft takes about 20 minutes with the stuff removed.
if you search post regarding shifters such as Hurst everyone complained over buzzing and rattling shifters well our Hurst is whisper quiet now after the install.
I hear that Tremec and GM have a pending lawsuit over this because Tremecs blueprints show the parts but GM said they didnt need it to reduce cost and screw us so there you have it.
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