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99 4Runner limited auto hubs

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Old 01-02-2008, 03:51 AM
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99 4Runner limited auto hubs

Yesturday I noticed my left hub was not locking and was making a spinning noise anybody have any thoughts?
Thanks tahike
Old 01-02-2008, 04:50 AM
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Your 99 does not have auto hubs, its has ADD. The hubs are always engaged to the axle. The noise is coming from something else.
Old 01-02-2008, 12:37 PM
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What does add stand for? thanks
Old 01-02-2008, 12:42 PM
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This may give you a little bit of insight:

http://www.hunt4steve.com/99RunLtdIFS_Shafts.html

http://www.hunt4steve.com/99RunLtdDT.html#hubs

Here is the page to the FSMs for the 99 4Runner. Read em
http://www.hunt4steve.com/99RunLtdFsm.html
Old 01-02-2008, 12:42 PM
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Automatic disconnecting differential.

Its a vaccum actuated mechanism that locks and unlocks power to your axles.

Like Cougar said, you dont have "hubs" like the older trucks do. Its set up like front wheel drive CV's are set up. THe CV axle goes directly into the splined wheel hub with no moving parts.

Last edited by Adam F; 01-02-2008 at 12:44 PM.
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