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Author _ Katman | Created_ September
2004 | Last Update_ September 2004
SYNOPSIS
This article shows a few examples of how to check a B-series cable and hydro
transmissions for a Limited Slip Differential aka LSD.
CABLE
B-SERIES TRANNY LSD CHECK :
There are only 2 cable B16A LSD tranny's Honda of Japan released in the
past -- the 89-91 Y1 and the 92-93 YS1 'missions. The Y1 LSD's were for the most part equipped with a clutch-type LSD. The YS1 is equipped with a gear-type LSD, and
also shares
the
same
internal
tranny components
as the hydro
B16A
(Y21/S21)
'missions.
There are 2 ways to check a cable B-series
'missions
for LSD:
- Check
for the "LSD" stamp...
This
is mostly found on the Y1 'missions.
Take a
looksy on the top side of the transmission
casing
for
this punched-in "LSD"
stamp:
(Click
on the thumbnail)
NOTE:
This stamp is not found on all Y1 B16A 'missions, for some weird, unorthodox, Honda reason.
Which
brings us to example #2..
- Check the differential hole...
Simply
look through the differential hole.
If you see that the diff hole is totally hollow,
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 'mission has
a
stock
differential.
(see example)
HYDRO B-SERIES TRANNY LSD CHECK :
There's a handful of JDM & US hydro B-series 'missions available in
the world, yet they all particularily share
the
same LSD
identifiers, similiar to that of cable B-series
'missions.
Here's a list of hydro B-series
engines that came with optional LSD transmissions
(depending
on vehicle model):
92-95 B16A - Y21
96-00 B16A
- S4C
98-01 B16B - S4C
94-01 B18C/ B18C-R -
Y80 & S80
- 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:
(see
example)
NOTE: This ink stamp can easily be rubbed or cleaned off,
which again, brings
us to example #2..
- Check the differential hole...
Like
the cable B16 'mission,
simply look through the differential hole.
If you see that the diff. hole is totally hollow,
with no obstruction in the way, the tranny is LSD equipped.
If diff. hole is not hollow and
has a bar through the middle, the 'mission has a stock differential.
(see example)
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
Here's a little bit of tech info regarding 3 types of LSD's Honda uses in their
'missions:
- 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:
- Cable
& hydro B-series transmissions
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