Time to rebuild the differential...

[Anthony@HTM]

Thank you for the input. I just hate to have catastrophic failures if I can stop it before hand.

The slack between the ring teeth and the pinion teeth was basically always there. The OE bushings just filtered out most of the noise so you tended to not notice it. Not saying you shouldn't consider rebuilding the diff, just that what you mainly noticed was the difference in NVH transmitted up into the cabin.

FWIW, the stiffer bushings will at least theoretically increase the impact loading a little every time that the gear tooth clearance is suddenly taken up. The whole diff and its support system became more rigid.


Norm

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[gsxr1300]

probably need new clutches pads in the diff.

 

[Whiskey11]

Thank you for the input. I just hate to have catastrophic failures if I can stop it before hand.

Food for thought: How many drag cars are running a standard 8.8" live axle under their cars? Quite a lot, really, maybe not the super serious builds, but still a large number of them. Ford made some BIG changes to the 8.8" setup in the S550 to make it stronger. If this gear slack is normal, how many hard launches in a 662 hp 630lb*ft of torque GT500 monster with aftermarket control arms will it take to bust a standard 8.8 R&P vs the new one? Realistically speaking, more than we probably care to actually know.

I wouldn't worry about it and just focus on driving smooth. This isn't a new issue for automobiles and it has been extensively worked on and improved upon to make it basically a non-issue. These gears are designed to operate with this type of stress on them.

 

[Anthony@HTM]

Thanks for the insight. I've only owned Awd cars so this is new for me.

I'll definitely be able to sleep better now!

Food for thought: How many drag cars are running a standard 8.8" live axle under their cars? Quite a lot, really, maybe not the super serious builds, but still a large number of them. Ford made some BIG changes to the 8.8" setup in the S550 to make it stronger. If this gear slack is normal, how many hard launches in a 662 hp 630lb*ft of torque GT500 monster with aftermarket control arms will it take to bust a standard 8.8 R&P vs the new one? Realistically speaking, more than we probably care to actually know.

I wouldn't worry about it and just focus on driving smooth. This isn't a new issue for automobiles and it has been extensively worked on and improved upon to make it basically a non-issue. These gears are designed to operate with this type of stress on them.

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