Author Topic: Automatic locking differential  (Read 1834 times)

BoxyShazam

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Automatic locking differential
« on: December 10, 2014, 01:37:41 PM »
Does anyone know whether or not a locking differential is a good idea for a race car? In theory it should operate in a similar fashion as a clutch type LSD. Usually they're used for offroading where speeds are low. Just wondering if they can take the abuse of locking at speed.

Here is an example of one that should fit a x7 Cressida rear end
https://www.marlincrawler.com/differential/locker/spartan-locker/spar-hilux/spartan-75-ifs

Crono0001

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Re: Automatic locking differential
« Reply #1 on: December 10, 2014, 02:41:11 PM »
From what I've been told (hanging around the NASA guys), a locker isn't very practical for road racing or daily driving.  Great for drifting and rock climbing, but not much else.  You are much better off with a helical or clutch type LSD.
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BoxyShazam

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Re: Automatic locking differential
« Reply #2 on: December 10, 2014, 03:12:03 PM »
No quiero helical. Drifting is what I'm mostly concerned with. My diff is currently welded so I can't imagine a locker hurting drivability unless it just explodes at the first corner. Thanks for the input though.

Crono0001

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Re: Automatic locking differential
« Reply #3 on: December 10, 2014, 04:27:04 PM »
If your goal is drifting and not racing, then a locker is perfect.
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BoxyShazam

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Re: Automatic locking differential
« Reply #4 on: December 10, 2014, 06:36:47 PM »
drifting and not racing
BUUUUURN! ouch

Crono0001

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Re: Automatic locking differential
« Reply #5 on: December 10, 2014, 11:04:57 PM »
Sorry, didn't mean it as an insult.... was just relaying information that I was taught.

Of course, I've never driven on anything beside my own helical diff, so I could very well be completely wrong.
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Wangchung_Tonight

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Re: Automatic locking differential
« Reply #6 on: December 11, 2014, 10:45:11 AM »
Helical diff's are better for roadracing/auto-x because the torque is sent to the path of most resistance, usually the outside wheel in a turn. This makes drifting a little weird, as the torque is being vectored side to side during total loss of traction.

A locker should be legit, I've thought of doing this before. A hell of a lot easier than swapping 3rd members every event lol

How much do they cost? Way cheaper than LSD?
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BoxyShazam

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Re: Automatic locking differential
« Reply #7 on: December 11, 2014, 10:52:31 AM »
The one I linked to up top is $373. About 1/4 the price of a legit 2way I think.

Wangchung_Tonight

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Re: Automatic locking differential
« Reply #8 on: December 13, 2014, 10:29:55 AM »
I say go for it
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Deuce Cam

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Re: Automatic locking differential
« Reply #9 on: December 13, 2014, 11:49:49 AM »
You've piqued my interest with the locker considering the least expensive legit lsd (tomei) is almost twice the price. Unfortunately I don't know anything about them though.

Is the cressida live axle? If so you definitely don't want a helical lsd regardless of what you're doing. They only work good with irs, and yeah, not for drifting.