Hello All- I recently purchased a low mile 89 GT in near perfect condition. The previous owner upgraded to 3.73 gears. It pretty much whines in every gear. Has anyone found a fix for this. It's really annoying. I'm thinking about going back to the original gears. I'm also wondering if the vibration at 65 MPH or higher is caused by the 3.73 gears as well. Any advice is the right direction would be appreciated. Thanks.
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3.73 gear whine and vibration over 65 MPH
- Thread starter 89GT
- Start date
broncojunkie
Well-Known Member
They shouldn't whine like that unless they weren't set up correctly or you have a bearing going bad. I would suggest pulling the cover and having a look inside. Now, I have heard that some aftermarket gearsets will be a little noisy, but if it's enough to be annoying to you, there's probably something wrong.
Fwiw, the stock gears will be noisy too, if the installer doesn't know what he's doing. From what I've seen, most backyard mechanics just throw a set of gears in with the same shims and run it. Sometimes they get lucky and sometimes the diff eats itself for lunch.
Fwiw, the stock gears will be noisy too, if the installer doesn't know what he's doing. From what I've seen, most backyard mechanics just throw a set of gears in with the same shims and run it. Sometimes they get lucky and sometimes the diff eats itself for lunch.