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Hotwheels
04-25-2011, 10:34 AM
I recently had a reputable speed shop install a set of Ford Racing 4:10 gears. Had both rear axles replaced and used the Ford Racing Install Kit. The rear end has a very slight whine when my foot isn't in the gas at around 50 mph and above. The installer says a slight whining is nomal and is a factor of "how deep" the gears are set. The deeper the gears are set the more reliability but a side affect is gear whine. I'm fine with the slight whine if the trade off is a more robust rear end.

Thoughts?
fastblackmerc
04-25-2011, 10:45 AM
I recently had a reputable speed shop install a set of Ford Racing 4:10 gears. Had both rear axles replaced and used the Ford Racing Install Kit. The rear end has a very slight whine when my foot isn't in the gas at around 50 mph and above. The installer says a slight whining is nomal and is a factor of "how deep" the gears are set. The deeper the gears are set the more reliability but a side affect is gear whine. I'm fine with the slight whine if the trade off is a more robust rear end.

Thoughts?

IMO... Any whine is a sign of improperly setup gears.

Never heard about setting gears deep.
guspech750
04-25-2011, 10:57 AM
My 4.10's are as silent as a corpse.

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Go White Sox!!!
fastblackmerc
04-25-2011, 10:57 AM
My 4.10's are as silent as a corpse.

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Go White Sox!!!

So are mine. Have been for over 60k.
guspech750
04-25-2011, 11:09 AM
Totally sucks when most people have a set of gears installed. And they are not installed correctly. You are replacing a part that's not broken and doesn't need to be replaced. It was a crappy nervous feeling in the back of my head knowing nothing was wrong with my 3.55's and replacing perfectly good gears with another set of perfectly good gears and hoping for a correct install.

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Go White Sox!!!
tbone
04-25-2011, 11:10 AM
Mine are fine too. The mechanic is full of it.
MM2004
04-25-2011, 11:11 AM
Set up correctly, the gears should not make a sound.

Mike.
SC Cheesehead
04-25-2011, 11:29 AM
Even with 4.10's, my car is as slow as a corpse.

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Go White Sox!!!

Fixed it for you... :D

BTW, no noise from my gears, either.
ctrlraven
04-25-2011, 11:51 AM
Take it back right away and have them fix it. I had mine installed for about 4-5k miles and then started hearing a lot of whine. Took it back to the person who did the install and two bearings were notched and pitted. Replaced the bearings and it's sooo quiet now.
FastMerc
04-25-2011, 04:02 PM
They were not set correctly the backlash is off,there shouldnt be a sound.Mine are quiet!