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Rear diff Question?

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Old Jun 11, 2021 | 01:53 AM
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Default Rear diff Question?

Is it actually necessary to go and do figure 8’s after changing the diff fluid?

could I theoretically just go hit up some twisty roads?
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Old Jun 11, 2021 | 02:56 AM
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So easy just to do it the prescribed way why mess around
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Old Jun 11, 2021 | 03:45 AM
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Originally Posted by NYC6
So easy just to do it the prescribed way why mess around

don’t really have any parking lots or open areas close to me big enough to do figure 8’s. But I’m right next too twisty backwoods roads.

so that’s why I ask.
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Old Jun 11, 2021 | 09:07 AM
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6 or so three point turns in and out of a driveway should be sufficient. Go lock to lock on the steering. Might even work better because you're reversing the differential action on the clutch packs. YMMV

Last edited by FatsWaller; Jun 11, 2021 at 11:47 AM.
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Old Jun 11, 2021 | 09:56 AM
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Manual states run the car at 10mph with the wheels in the air for about one minute. I did this plus a few 3 point turns and things are fine.
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Old Jun 11, 2021 | 11:44 AM
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What happens if you do not do figure 8's. I had all fluids change when I bought my 05 never did 8's?
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Old Jun 11, 2021 | 11:54 AM
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Best guess is that the figure 8s just speed up the integration of the new fluid into the clutch packs. You'd have to think just driving around in town is going to do that in a few days just making left and right turns.
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Old Jun 11, 2021 | 11:58 AM
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The point of it is to mix and circulate the fluid throughout coating the gears. The aim of the figure 8s in a parking lot is to do it a safer environment, while going making the tighter turns.

I would think tighter twisty roads would work but would take them pretty slow.

Originally Posted by FatsWaller
Best guess is that the figure 8s just speed up the integration of the new fluid into the clutch packs. You'd have to think just driving around in town is going to do that in a few days just making left and right turns.
From what I've read, yeah. As long as you arn't refilling it then hammering it through turns

Last edited by ssg10587; Jun 11, 2021 at 11:59 AM.
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Old Jun 11, 2021 | 05:47 PM
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The "figure 8 method" works even faster if you drive with your right eye closed while only using your left hand to steer. Oh, and you must have the radio cranked-up and tuned to a Tejano music station.
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