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LSD Check! (D-series)
Author _ Katman | Created_ June 2005 | Last Update_ June 2005

SYNOPSIS

Like the B-series LSD Check! article, this article shows a few examples of how to check D-series cable and hydro transmissions for a factory Limited Slip Differential aka LSD. I haven't come across too many factory D-series LSD tranny's in the past, so this article is going to run short on information. For those that can help, please contact me if you have access to rare factory LSD D-series transmissions so that I may show expose information on them here.

HYDRO D15B AUTO D-SERIES TRANNY LSD CHECK :

A friend of mine snapped these to images below, but this is the first time I've seen this - an AUTO D15B transmission from a JDM EG front clip:
    (Click on the thumbnail)
    Clik me for image! Clik me for image!


  1. Check the differential hole...
    I assume LSD's for D-series have the same characteristics as B-series. So you should be able to simply look through the differential hole routine.
    If you see that the diff hole is totally hollow (as shown below), with no obstruction in the way, the tranny IS LSD equipped.
    If the diff hole is not hollow and has a bar through the middle, the tranny has a stock differential.

    (Click on thumbnail)
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HYDRO D-SERIES 5-SPEED TRANNY LSD CHECK :

No info that this time...
  1. Check for the "LSD" ink stamp...
    This is really easy to indentify.
    Simply look on the front section of the 'mission casing for this ink "LSD" stamp:

    (Click on thumbnail)
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    NOTE
    : This ink stamp can easily be rubbed or cleaned off, which again, brings us to example #2..

  2. Check the differential hole...
    I assume LSD's for D-series have the same characteristics as B-series. So you should be able to simply look through the differential hole routine.
    If you see that the diff hole is totally hollow (as shown below), with no obstruction in the way, the tranny IS LSD equipped.
    If the diff hole is not hollow and has a bar through the middle, the tranny has a stock differential.

    (Click on thumbnail)
    Clik me for image!


    Peeking through the diff whole is thee best way to check a transmission for LSD, while the tranny is off the car of course!

ADDITIONAL INFORMATION

N/A at this time...
  • Gear Type LSD
    Gear type LSD's have gears inside of them (duh!) that mesh together when load is detected. This type is good to have because you'll probably never have to replace worn internal LSD parts, unlike the clutch type. The downside, especially for stock Type-R LSD's, is that they can internally break if your into rough circut racing. Lifting a front wheel in a turn and landing back on it is how the LSD can break. Real stiff suspension is a major factor in making a car lift during a high speed turn - so be careful!
  • Clutch Type LSD
    Clutch type LSD's have small clutches inside that engage when load is being detected. Clutch type LSD's won't break if you happen to lift a wheel, unlike gea type. The only real downside to the clutch type is the wearing of clutches over time. Just like the clutch disc inside of your tranny, the clutches inside this LSD wear out too, and need replacement/servicing.
  • Viscous Type LSD (rare)
    Viscous Type are similar to the viscous LSD's used in some AWD vehicles. The way these work is that a special fluid is used in the differential which THICKENS when excessive slip is induced. Stators and impellors in the diff make this even more efficient. Although, there is a slight delay in the locking of the differential. This LSD type work very well and last a long time but cost maad loot. According to my resources, this was a special order LSD for JDM 96-97 ITR integra's only. No other countries would receive this optional LSD, only Japan. The cost was about twice as much as a the common gear type LSD. One odd thing though, Honda of Japan does NOT have this optional LSD type for 98+ Integra-R's!

The information in this article applies to:

  • D-series cable & hydro transmissions