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how long do oem lsd's last?

 
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Old 08-26-2014, 03:51 PM
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how long do oem lsd's last?

I'm thinking about getting a limited slip differential for my dirt track car for next season.

I see used jdm lsd equipped transmissions on ebay for ok prices, but I'm not sure on a few things. I was thinking about getting an aftermarket one, but they are just as much money as an oem one, and the oem ones are already installed.

How long do the lsd's last before they wear out? Would they be worn out at 60,000 miles? And how well do the oem lsd's work in general?

Thanks,

dirttrackracindude
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Old 08-27-2014, 12:45 AM
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Re: how long do oem lsd's last?

From what I've heard the OEM LSD that came out in JDM 4th gens (M2B4) is pretty much the same idea as the Quaife aftermarket one, they're both helical gear types and need little maintenance. If it hasn't been trashed it's whole life then it should still be good at 60,000 miles. The Quaife will supposedly outperform the OEM in every way though. The Kaaz on the other hand is a clutch type and apparently has a more aggressive engagement than the helical types but need occasional rebuilding depending on how much punishment they take.

There's a good bit of info on the different gear ratios here:

Prelude/H-series Transmission Codes and Ratios master-list - Honda-Tech

Won't help much deciding which LSD to buy but if you do end up changing transmissions then it'd be good to know if/how things will change.

Sorry if that doesn't help you much. OEM is a good option and probably the cheapest one but also the lowest performer. All depends on what your budget is and how much messing around you want to do. Personally I'd go for the OEM option, then do a full transmission rebuild + Quaife when all the teeth get smashed off the first one.
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Old 08-28-2014, 05:39 PM
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Re: how long do oem lsd's last?

M2b4 is viscous. I found out after I bought one and disassembled it. There's also pics of one floating around on the internet somewhere.
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Old 08-28-2014, 10:49 PM
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Re: how long do oem lsd's last?

really? That's not good. That means it will be worn out at 60,000 miles.... I wonder if the other ones have viscous as well. I might just have to go with an aftermarket one. Has anybody done a write up on how to install an aftermarket lsd in an h series transmission? I want to know what I'm getting into. lol
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Old 08-30-2014, 11:11 PM
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Re: how long do oem lsd's last?

I think the one from the s-spec is a helical. I ave the M factory helical for my build, but I haven't installed it yet.
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Old 06-27-2015, 11:17 AM
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Re: how long do oem lsd's last?

When you say "viscous" is that good or bad? I was planning on buying a m2b4
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