# Rear Axles / Half Shalfs?

**URL:** <https://forums.speedlife.net/t/rear-axles-half-shalfs/108870>\
**Category:** SON240sx Automotive\
**Created:** [August 24, 2007, 12:38pm UTC](https://forums.speedlife.net/t/rear-axles-half-shalfs/108870 "2007-08-24T12:38:53Z")\
**Posts on this page:** 7\
**Page:** 1

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**Author:** ![Jedi\_Car\_Fan](https://avatars.discourse-cdn.com/v4/letter/j/b9e5f3/32.png) [@Jedi\_Car\_Fan](https://forums.speedlife.net/u/Jedi_Car_Fan)\
**Post date:** [August 24, 2007, 12:38pm UTC](https://forums.speedlife.net/t/rear-axles-half-shalfs/108870/1 "2007-08-24T12:38:53Z")

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As per the title…

Is their a difference between the Axles/Half Shalfs from an Open Diff to VLSD?

I know one is longer then the other making them driver/passenger side specific but I couldnt remember if the lenghts also changed from Open/LSD etc etc… (I’m assuming they dont)

Thanks

Jeff

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**Author:** ![S13GG](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/s13gg/32/5506_2.png) [@S13GG](https://forums.speedlife.net/u/S13GG)\
**Post date:** [August 24, 2007, 12:53pm UTC](https://forums.speedlife.net/t/rear-axles-half-shalfs/108870/2 "2007-08-24T12:53:07Z")

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having installed a VLSD into a 1990 without changing the half-shafts and not having any problems, I would like to say there isn’t a difference, but I’m not certain.

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**Author:** ![big-byrd](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/big-byrd/32/3192_2.png) [@big-byrd](https://forums.speedlife.net/u/big-byrd)\
**Post date:** [August 24, 2007, 1:12pm UTC](https://forums.speedlife.net/t/rear-axles-half-shalfs/108870/3 "2007-08-24T13:12:21Z")

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jeff, as far as i know, there is no difference.

don’t quote me on that though…

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**Author:** ![Blue\_S13](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/blue_s13/32/5563_2.png) [@Blue\_S13](https://forums.speedlife.net/u/Blue_S13)\
**Post date:** [August 24, 2007, 2:30pm UTC](https://forums.speedlife.net/t/rear-axles-half-shalfs/108870/4 "2007-08-24T14:30:10Z")

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I put that open diff of your’s in my '93 without any hiccups.

I think that they are the same.

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**Author:** ![spd-dmn](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/spd-dmn/32/5513_2.png) [@spd-dmn](https://forums.speedlife.net/u/spd-dmn)\
**Post date:** [August 24, 2007, 5:07pm UTC](https://forums.speedlife.net/t/rear-axles-half-shalfs/108870/5 "2007-08-24T17:07:06Z")

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the axles are the same i believe

it’s the output shafts that are different between open/vlsd

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**Author:** ![Osad](https://avatars.discourse-cdn.com/v4/letter/o/3ab097/32.png) [@Osad](https://forums.speedlife.net/u/Osad)\
**Post date:** [August 24, 2007, 6:10pm UTC](https://forums.speedlife.net/t/rear-axles-half-shalfs/108870/6 "2007-08-24T18:10:39Z")

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JDM S13 has the 5 bolt output shafts. JDM S14 has the 6 bolt. All USDM vlsd’s have the 6 bolt pattern just as the open diff, so you should have no issues.

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**Author:** ![jammin1911](https://avatars.discourse-cdn.com/v4/letter/j/a9a28c/32.png) [@jammin1911](https://forums.speedlife.net/u/jammin1911)\
**Post date:** [August 24, 2007, 6:20pm UTC](https://forums.speedlife.net/t/rear-axles-half-shalfs/108870/7 "2007-08-24T18:20:51Z")

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^^ i’m in absolute shock right now