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[Datsun 1200 encyclopedia]

LSD

(Difference between revisions)

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Category: Rear Axle And Rear Suspension

Revision as of 23:11, 5 November 2012
ddgonzal (Talk | contribs)
(->Non-threaded Adapter)
<- Previous diff
Current revision
ddgonzal (Talk | contribs)
(->R180)
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Limited Slip Differentials come in many different types, but the main thing is they limit wheelspin. This is useful in racing and in low-traction surfaces (rain, snow, etc). Or for maximum accleration at full throttle. Different types of LSD are cone-clutch, spring-loaded, clutch-pack, hydrodynamic (viscous), etc. Some trademarks are "Posi-Traction" (GM), "Traction-Lok" (Ford), Torsen (Bosch). Limited Slip Differentials come in many different types, but the main thing is they limit wheelspin. This is useful in racing and in low-traction surfaces (rain, snow, etc). Or for maximum accleration at full throttle. Different types of LSD are cone-clutch, spring-loaded, clutch-pack, hydrodynamic (viscous), etc. Some trademarks are "Posi-Traction" (GM), "Traction-Lok" (Ford), Torsen (Bosch).
-[http://datsun1200.com/modules/myalbum/photo.php?lid=1652 http://datsun1200.com/modules/myalbum/photos/thumbs/1652.jpg] [http://datsun1200.com/modules/myalbum/photo.php?lid=19811 http://datsun1200.com/modules/myalbum/photos/thumbs/19811.jpg]+{{Album|1652}} {{AlbumH|19811|jpg|300}}
A differential is inside the "final drive" (ring & pinion) gears and allows the left and right wheels to turn at different speeds. This is important of course for going around corners. The downside is that if one wheel is on slippery ground (ice, gravel, mud, etc) the car doesn't go at all, as one wheel is turning but slipping and the other not turning at all. Hence the usefulness of LSD or locking diffentials, which are typically used on high-performance cars. Locking is typically used on off-road vehicles, LSD for road vehicles, including racecars. A differential is inside the "final drive" (ring & pinion) gears and allows the left and right wheels to turn at different speeds. This is important of course for going around corners. The downside is that if one wheel is on slippery ground (ice, gravel, mud, etc) the car doesn't go at all, as one wheel is turning but slipping and the other not turning at all. Hence the usefulness of LSD or locking diffentials, which are typically used on high-performance cars. Locking is typically used on off-road vehicles, LSD for road vehicles, including racecars.
Line 12: Line 12:
== H145 == == H145 ==
-Nissan Performance racing parts used to sell an LSD for the 1200.+LOM58
-<br>[http://datsun1200.com/modules/myalbum/photo.php?lid=1652 http://datsun1200.com/modules/myalbum/photos/thumbs/1652.jpg] H145 LSD (NLA)+ 
 +Nissan Performance racing parts used to sell an LSD for the 1200 -- H145 LSD (NLA)
 +<br>{{Album|1652}}
Nissan Part Number: 38420-H1020 L/S ASSY H145 (TO 8/74) Nissan Part Number: 38420-H1020 L/S ASSY H145 (TO 8/74)
-<br>[http://datsun1200.com/modules/myalbum/photo.php?lid=19811 http://datsun1200.com/modules/myalbum/photos/thumbs/19811.jpg]+<br>{{Album|19811}} {{Photo|lsd145-1.jpg}} {{Photo|lsd145-2.jpg}} {{Photo|lsd145-3.jpg}}
=== Parts === === Parts ===
From the [[1984 Nissan Competition Catalog]]: From the [[1984 Nissan Competition Catalog]]:
-H145A LIMITED-SLIP ASSY (TO 8/74)+ H145A LIMITED-SLIP ASSY (TO 8/74)
-* 38420-H1020 L/S ASSY+ * 38420-H1020 L/S ASSY
-* 38423-H0120 SIDE GEAR (2)+ * 38423-H0120 SIDE GEAR (2)
-* 38424-H0120 THRUST WASHER (1.0MM) (2)+ * 38424-H0120 THRUST WASHER (1.0MM) (2)
-* 38424-H0120 THRUST WASHER (1.25MM) (2)+ * 38424-H0120 THRUST WASHER (1.25MM) (2)
-* 38425-H0120 PINION (4)+ * 38425-H0120 PINION (4)
-* 38427-H0120 PINION MATE SHAFT+ * 38427-H0120 PINION MATE SHAFT
-* 38429-H0120 PINION SHAFT+ * 38429-H0120 PINION SHAFT
-* 38430-H0120 DISTANCE PIECE+ * 38430-H0120 DISTANCE PIECE
-* 38431-H0120 PRESSURE RING (2)+ * 38431-H0120 PRESSURE RING (2)
-* 38437-H0120 CENTER RING+ * 38437-H0120 CENTER RING
-* 38432-H0120 FRICTION PLATE (1.5MM) (2)+ * 38432-H0120 FRICTION PLATE (1.5MM) (2)
-* 38432-H0121 FRICTION PLATE (1.45MM) (2)+ * 38432-H0121 FRICTION PLATE (1.45MM) (2)
-* 38432-H0121 FRICTION PLATE (1.55MM) (2)+ * 38432-H0121 FRICTION PLATE (1.55MM) (2)
-* 38433-H0120 FRICTION DISC (1.5MM) (2)+ * 38433-H0120 FRICTION DISC (1.5MM) (2)
-* 38434-H0120 SPRING DISC (1.5MM) (2)+ * 38434-H0120 SPRING DISC (1.5MM) (2)
-* 38435-H0120 SPRING PLATE (1.5MM) (2)+ * 38435-H0120 SPRING PLATE (1.5MM) (2)
-* 08320-61000 SCREW (4)+ * 08320-61000 SCREW (4)
== H150 == == H150 ==
-Nissan Performance racing parts used to sell an LSD for the B210, part number 38420-RS210.+Nissan Performance racing parts used to sell an LSD for [[H150]] -- as used by the 1975-1978 [[B210]] & 1979-1982 [[B310]], part number 38420-RS210. As of 2018, Nissan USA (parts.nissanusa.com) still [https://parts.nissanusa.com/media/estores/14/contentimages/Nissan%20Motorsports%20Competition%20Parts%20Catalog.pdf shows it in the PDF catalog] (page 53).
-<br>[http://datsun1200.com/modules/myalbum/photo.php?lid=16207 http://datsun1200.com/modules/myalbum/photos/thumbs/16207.jpg] [http://datsun1200.com/modules/myalbum/photo.php?lid=16206 http://datsun1200.com/modules/myalbum/photos/thumbs/16206.jpg] [http://datsun1200.com/modules/myalbum/photo.php?lid=15414 http://datsun1200.com/modules/myalbum/photos/thumbs/15414.jpg] [http://datsun1200.com/modules/myalbum/photo.php?lid=15415 http://datsun1200.com/modules/myalbum/photos/thumbs/15415.jpg] [http://datsun1200.com/modules/myalbum/photo.php?lid=15416 http://datsun1200.com/modules/myalbum/photos/thumbs/15416.jpg] [http://datsun1200.com/modules/myalbum/photo.php?lid=15417 http://datsun1200.com/modules/myalbum/photos/thumbs/15417.jpg] +<br>{{AlbumH|27013|jpg|398}} {{Album|15414}} {{Album|15415}} {{Album|15416}} {{AlbumH|15417|jpg|398}}
-Aftermarket H150 LSD+Occasionally Nismo LSD units are still for sale:
-<br>[http://datsun1200.com/modules/myalbum/photo.php?lid=16455 http://datsun1200.com/modules/myalbum/photos/thumbs/16455.jpg]+
-== H165 ==+ [http://google.com/search?q=38420-RS210 Google search]
-=== AE86 Swap ===+
-Re-drill H165 housing for AE86 centre section+
-<br>[http://i297.photobucket.com/albums/mm219/ddgonzal/Datsun%201200/Sunny%20Truck/AE86/ss_1969camaro-img600x450-1351832041rp9avd33603.jpg http://i297.photobucket.com/albums/mm219/ddgonzal/Datsun%201200/Sunny%20Truck/AE86/th_ss_1969camaro-img600x450-1351832041rp9avd33603.jpg]+
-Use driveshaft adapter ring & machine AE86 companion to match. That's it. +While this photo shows a 4.375 gearset bolted to it, the LSD unit can be used with any H150 gearset
 +<br>{{Album|16207}} {{Album|16206}}
-[http://i297.photobucket.com/albums/mm219/ddgonzal/Datsun%201200/Sunny%20Truck/AE86/typhoon_0001-img600x450-13372225251fvhdp58789.jpg http://i297.photobucket.com/albums/mm219/ddgonzal/Datsun%201200/Sunny%20Truck/AE86/th_typhoon_0001-img600x450-13372225251fvhdp58789.jpg]+Aftermarket H150 LSD by Car Wash
 +<br>{{Album|16455}}
- propeller shaft pitch adapter+Occasionally offered for on [[Yahoo Auctions Japan]] like this diff head with LSD installed:
- Datsun 38mm center hole on one side+<br>{{Photo|H150_LSD-2.jpg}} {{Photo|H150_LSD-1.jpg}}
- AE86 46mm(?) spigot on the other+
- use B120 driveshaft+
- 12cm(?) thick +
- 45 x 54 mm H165 pattern (drill AE86 flange to match)+
- Use early T-series diff+{{UploadPost|174_5ae277ce11ca6.jpg|488186}} {{UploadPost|174_5ae27690a4ce9.jpg|488186}} {{UploadPost|174_5ae276b248115.jpg|488186}} {{UploadPost|174_5ae276ce9ed6e.jpg|488186}}
- AE86 DX & SR-5 +=== H150 LSD Parts ===
- 6.38 ring gear+[http://www.pitroad-ts.com/english/n-A-150.htm Pitroad sells parts] to rebuild the [[H150]] LSD.
- S292: 4.10 2-pinion (Automatic) USA+
- S314: 3.91 4-pinion (5-speed) USA+
- AE86 GT-S+ 38433-RS210 Friction Disc (6)
- 6.7" ring gear+ 38432-RS210 Friction Plate (4)
- T282: Open + 38435-RS210 Friction Plate Spring (2)
- T283: optional LSD (USA Only) 4.30 2-pinion+ 38436-RS210 Friction Disc Spring NLA
- T234: optional LSD+
-tap 10 new holes+== H165 ==
-<br>[http://i297.photobucket.com/albums/mm219/ddgonzal/Datsun%201200/Sunny%20Truck/AE86/o0640048012099159841.jpg http://i297.photobucket.com/albums/mm219/ddgonzal/Datsun%201200/Sunny%20Truck/AE86/th_o0640048012099159841.jpg]+=== Nismo ===
 + LSD 2-way with 24 x 23T splines
 + 38420-N5020 for Type I carriers
 + * H165 old type: 3.889 to 4.625 &#26087;&#22411;
 + * H165B low-tooth: 38420-N5020 3.700 to 4.875 &#20006;&#27503;&#22411;
 + 38420-RS110 for Type II carriers
 + * H165B high-tooth: 3.154 to 4.875 &#39640;&#27503;&#22411;
-=== Non-threaded Adapter ===+{{Album|25641}}
-==== Modified Flange Type ====+
-Drill 2nd pattern on AE86 flange.+
-[http://i297.photobucket.com/albums/mm219/ddgonzal/Datsun%201200/Sunny%20Truck/AE86/typhoon_0001-img600x450-133722252582flzt58789x.jpg http://i297.photobucket.com/albums/mm219/ddgonzal/Datsun%201200/Sunny%20Truck/AE86/th_typhoon_0001-img600x450-133722252582flzt58789x.jpg]+ 38420-A1260 L/S ASSY (TYPE II)
-AE86 flange is 78mm pcd (~55mm square). Drilled for smaller H165 pattern:+{{See|H165#Nissan_Competition}}
-<br>[http://i297.photobucket.com/albums/mm219/ddgonzal/Datsun%201200/Sunny%20Truck/AE86/IMGP8872.jpg http://i297.photobucket.com/albums/mm219/ddgonzal/Datsun%201200/Sunny%20Truck/AE86/th_IMGP8872.jpg]+
-==== Bolt-Through Spacer Type ====+RS110 - H165B
-Requires more complicated spacer machining+<br>{{Album|26665}} {{Album|26666}} {{Album|26667}}
-http://i297.photobucket.com/albums/mm219/ddgonzal/Datsun%201200/Sunny%20Truck/AE86/348-6919-1.jpg+With custom steel center
- +<br>{{Album|7958}} {{Album|7968}}
-== Threaded Adapter ==+
-AE86 side, 78mm PCD, spigot hole ~46mm+
-<br>[http://i297.photobucket.com/albums/mm219/ddgonzal/Datsun%201200/Sunny%20Truck/AE86/o0640048012099158869x.jpg http://i297.photobucket.com/albums/mm219/ddgonzal/Datsun%201200/Sunny%20Truck/AE86/th_o0640048012099158869x.jpg] [http://i297.photobucket.com/albums/mm219/ddgonzal/Datsun%201200/Sunny%20Truck/AE86/o0640048012099216389.jpg http://i297.photobucket.com/albums/mm219/ddgonzal/Datsun%201200/Sunny%20Truck/AE86/th_o0640048012099216389.jpg]+
- +
-Sunny Truck tailshaft side, 45 x 54 mm pattern, spigot ~38mm O.D.+
-<br>[http://i297.photobucket.com/albums/mm219/ddgonzal/Datsun%201200/Sunny%20Truck/AE86/o0640048012099158870x.jpg http://i297.photobucket.com/albums/mm219/ddgonzal/Datsun%201200/Sunny%20Truck/AE86/th_o0640048012099158870x.jpg] [http://i297.photobucket.com/albums/mm219/ddgonzal/Datsun%201200/Sunny%20Truck/AE86/o0640048012099216387x.jpg http://i297.photobucket.com/albums/mm219/ddgonzal/Datsun%201200/Sunny%20Truck/AE86/th_o0640048012099216387x.jpg]+
=== Pitroad/TRD === === Pitroad/TRD ===
Pitroad sells a brand new LSD for the H165B axle (1985-up Sunny Truck) for about $1200 USD. It is from TRD (Toyota Racing Development) and is a bolt in when using the AE86 ring gear bolts. Pitroad sells a brand new LSD for the H165B axle (1985-up Sunny Truck) for about $1200 USD. It is from TRD (Toyota Racing Development) and is a bolt in when using the AE86 ring gear bolts.
[http://www.pitroad-ts.com/A-parts-2/h165trd.htm?SLANG=ja&TLANG=en&XTYPE=0 Pitroad H165 LSD] or [http://www.pitroad-ts.com/process-2/ae86lsd.htm TRD] [http://www.pitroad-ts.com/A-parts-2/h165trd.htm?SLANG=ja&TLANG=en&XTYPE=0 Pitroad H165 LSD] or [http://www.pitroad-ts.com/process-2/ae86lsd.htm TRD]
 +
 +{{Album|19002}}
You can also buy the AE86 LSD (PN 41301-TA005) direct from TRD, be aware however that this is untested, and probably won't fit most H165 carriers. About [http://www.amazon.com/TRD-41301-TA005-Mechanical-Limited-Differentials/dp/B000ED48L0/ref=sr_1_58/002-9777519-7720841?ie=UTF8&s=automotive&qid=1188187645&sr=1-58 $850 USD] You can also buy the AE86 LSD (PN 41301-TA005) direct from TRD, be aware however that this is untested, and probably won't fit most H165 carriers. About [http://www.amazon.com/TRD-41301-TA005-Mechanical-Limited-Differentials/dp/B000ED48L0/ref=sr_1_58/002-9777519-7720841?ie=UTF8&s=automotive&qid=1188187645&sr=1-58 $850 USD]
-http://trdsales.toyota.co.nz/shop/shop_images/d_lsd1.jpg [http://trdsales.toyota.co.nz/shop/addprod.asp?productid=1631&itemid=658 TRD Sales NZ]+{{Album|15510}} {{Album|15511}}
 + 
 +Special stepped bolts can be used with the M10 type H165.
 +<br>{{Photo|H165-TRD-1.jpg}} {{Photo|H165-TRD-2.jpg}} {{Photo|H165-TRD-3.jpg}} {{Photo|H165-TRD-4.jpg}}
 + 
 +=== {{RefNo|AE86|}} AE86 Diff Swap ===
 +{{Main|AE86 LSD Swap}}
 + 
 +{{PhotoH!|typhoon_0001-img600x450-13372225251fvhdp58789.jpg|Datsun%201200/Sunny%20Truck/AE86}} {{AlbumH!|6238}}
 + 
 +== H190 ==
 +[[H190]] axle assembly from a 320 is narrower than a 1200 axle, so is a good candidate for a swap.
 + 
 +Nismo M-99996-T3011 $600 Detroit Locker
 + 
 +Nismo H190 Limited-Slip Differential units
 +<br>{{Album|2759}}
 + 
 +For North America, optional H-190 LSD for the Hardbody when equipped with the Z24 or KA24E (2WD only, Four-cylinder only).
 + 
 + 1988-1994 (D21) & 5-1996.5 (D21U)
 + 38420-G7020 DIFFERENTIAL ASSY LSD (OPTION)
 + 38303-10V02 LABEL-DIFFERENTIAL "LSD"
 + LABEL-DIFFERENTIAL "USE ONLY LSD OIL"
 + 
 +{{PB2|q251|datzenmike|720%20stuff|Pathfinder--D-21conversion034Large.jpg}} {{PB2|q251|datzenmike|720%20stuff|Pathfinder--D-21conversion039Large.jpg}}
 + 
 +== R180 ==
 +Both Nissan and Cusco sell LSD for the [[R180]] IRS diff
 + 
 + Nissan 38760
 + {{searchPart|38411-20R21}} COUPLING ASSY-VISCOUS $584 USD
 + * Superseded 38411-20R14
 + * N14 Pulsar/Sunny JDM.SR20DET (RNN14) 1991-1994 [R180]
 + * M11 USA Axxess 0189-0394 4WD.KA24E.SGL.FA (R180)
 + * U12 Bluebird 1988-1991
 + * P10 Primera 1991-1995
 + 
 + Cusco for R180
 + MZ TYPE-RS No. {{search|Cusco+LSD684|LSD684}} 1.5 way Subaru BP/BL (2003-2009 Legacy/Liberty)
 + MZ 1-way
== CA200 == == CA200 ==
-Nissan CA200 axle, salisbury type, is an R200 gearset in live axle form.+Nissan CA200 axle, salisbury type, is an [[R200]] gearset in live axle form.
AC brand for 29 Spline C200 Axle AC brand for 29 Spline C200 Axle
Line 120: Line 152:
See main article: [[Phantom Grip]] See main article: [[Phantom Grip]]
-<br>[http://datsun1200.com/modules/myalbum/photo.php?lid=3423 http://datsun1200.com/modules/myalbum/photos/thumbs/3423.jpg]+<br>{{Album|3423}}
-<blockquote><hr>Depending on how you drive a phantom can last for a long time, to my memory mic had it in a rally car for 2 years then I had it in a road car for bout the same and at the end it started slipping but just needed to be re shimmed.+<blockquote>Depending on how you drive a phantom can last for a long time, to my memory mic had it in a rally car for 2 years then I had it in a road car for bout the same and at the end it started slipping but just needed to be re shimmed.
- +<br>
-[http://datsun1200.com/modules/newbb/viewtopic.php?post_id=367372#forumpost367372 supafatto]<hr></blockquote>+<br>[{{Post|367372}} supafatto]</blockquote>
== Torsen Diff == == Torsen Diff ==
Line 132: Line 164:
* If a wheel comes off the ground it stops working * If a wheel comes off the ground it stops working
-For more information, see [http://datsun1200.com/modules/newbb/viewtopic.php?topic_id=43075&forum=1&post_id=289072]LSD vs Quaife ATB]+For more information, see [{{Post|289072}} LSD vs Quaife ATB]
== 1.5-way vs 2-way == == 1.5-way vs 2-way ==
Line 143: Line 175:
= Factory = = Factory =
== Japan == == Japan ==
 + LABEL-DIFFERENTIAL
 + 38308-10V02 LSD/&#12494;&#12531;&#12473;&#12522;&#12471;&#12503;&#12288;&#12487;&#12501;&#12288;&#12471;&#12520;&#12454;/&#12522;&#12511;&#12486;&#12483;&#12489;&#12288;&#12473;&#12522;&#12483;&#12503;&#12288;&#12487;&#12501;&#12288;&#12471;&#12520;&#12454;
 + * C22/GC22/TC22/C23,D21/WD21/D22,K30,K30S
 + * VE24/WE24,AC34,JR50,R33,R50,R20,Y60
 +
38420-N9000 4-pinion 38420-N9000 4-pinion
* 720 8004-8303 4-pinion * 720 8004-8303 4-pinion
Line 198: Line 235:
A "locking" differential is another animal. When locked there is no slip -- not just limited slip, but none at all. When unlocked, it's the same as an open differential. These are used for racing or for seriously slow off-road work. A "locking" differential is another animal. When locked there is no slip -- not just limited slip, but none at all. When unlocked, it's the same as an open differential. These are used for racing or for seriously slow off-road work.
-<blockquote><hr>Locked diffs are also useful for circuit racing. Many race cars from all sorts of categories use locked diffs. The understeer that is apparent on street/drag cars with locked diffs can easily be eliminated with proper (race) suspension geometry. These settings (camber, castor, and toe) will not be practical for street use though.+<blockquote>Locked diffs are also useful for circuit racing. Many race cars from all sorts of categories use locked diffs. The understeer that is apparent on street/drag cars with locked diffs can easily be eliminated with proper (race) suspension geometry. These settings (camber, castor, and toe) will not be practical for street use though.
- +<br>
-L18_B110+<br>L18_B110</blockquote>
-<hr></blockquote>+
There are different types of locking diffs. There are different types of locking diffs.
Line 208: Line 244:
The ARB air-locker is popular with Jeeps and other off-roaders. When the dash-mounted switch is flipped, air pressure locks the diff gears together The ARB air-locker is popular with Jeeps and other off-roaders. When the dash-mounted switch is flipped, air pressure locks the diff gears together
-== Detroit Lockr == +== Detroit Locker ==
The "Detroit Locker" was used by some high-performance Ford vehicles in the 60s and 70s. The Locker may be the only modern road-going locking differential, as it can automatically lock and unlock. It is sort of a hybrid between an LSD and a Locker. The "Detroit Locker" was used by some high-performance Ford vehicles in the 60s and 70s. The Locker may be the only modern road-going locking differential, as it can automatically lock and unlock. It is sort of a hybrid between an LSD and a Locker.
== Spools == == Spools ==
-For drag racing, the spider gears can be replaced with a sold unit so that both axles are always locked together. This is called a "spool"+For drag racing, the spider gears can be replaced with a sold unit so that both axles are always locked together. This is called a "spool". It is similar to a welded diff, but is a bolt-in part made for this purpose.
-<hr>[http://datsun1200.com/modules/myalbum/photo.php?lid=1467 http://datsun1200.com/modules/myalbum/photos/thumbs/1467.jpg] spool (right center)+ 
 +{{Album|8418}} {{Album|13997}} {{Album|1467}} spool (right center)
== Welded Diff == == Welded Diff ==
Line 220: Line 257:
Using a spool or welded diff gears on the street is illegal in most countries, and can be dangerous, especially in the wet. The danger is of spinning out as the wheels do not turn independently, but the inside wheel is forced along the same as the outer. Using a spool or welded diff gears on the street is illegal in most countries, and can be dangerous, especially in the wet. The danger is of spinning out as the wheels do not turn independently, but the inside wheel is forced along the same as the outer.
-[[Category:Rear Axle And Rear Suspension]]+{{Album|21910}}
 + 
 +[[Category:Rear Axle And Rear Suspension]]{{End}}

Current revision

A Limited Slip Differential (LSD) prevents one of the rear wheels slipping. A differential is inside the final drive (ring & pinion) gears and allows the left and right wheels to turn at different speeds. This is important of course for going around corners. The downside is that if one wheel is on slippery ground (ice, gravel, mud, etc) the car doesn't go at all, as one wheel is turning but slipping and the other not turning at all. Hence the usefulness of LSD or locking diffentials, which are typically used on high-performance cars. Locking is typically used on off-road vehicles, LSD for road vehicles, including racecars. Most productions cars did not and still do not come equipped with LSD. Less expensive cars (like the 1200) did not even have it as an option, however Datsun Competition sold an LSD that fit Datsun 1200.

Contents

Overview

Limited Slip Differentials come in many different types, but the main thing is they limit wheelspin. This is useful in racing and in low-traction surfaces (rain, snow, etc). Or for maximum accleration at full throttle. Different types of LSD are cone-clutch, spring-loaded, clutch-pack, hydrodynamic (viscous), etc. Some trademarks are "Posi-Traction" (GM), "Traction-Lok" (Ford), Torsen (Bosch).

1652.jpgAlbum 1652 19811.jpgAlbum 19811

A differential is inside the "final drive" (ring & pinion) gears and allows the left and right wheels to turn at different speeds. This is important of course for going around corners. The downside is that if one wheel is on slippery ground (ice, gravel, mud, etc) the car doesn't go at all, as one wheel is turning but slipping and the other not turning at all. Hence the usefulness of LSD or locking diffentials, which are typically used on high-performance cars. Locking is typically used on off-road vehicles, LSD for road vehicles, including racecars.

LSD

Nissan Performance racing parts used to sell a clutch-pack type LSD for the H145, H150 and H165. These parts are NLA, however may be found occasionally in specialty shops or on eBay.

H145

LOM58

Nissan Performance racing parts used to sell an LSD for the 1200 -- H145 LSD (NLA)
1652.jpgAlbum 1652

Nissan Part Number: 38420-H1020 L/S ASSY H145 (TO 8/74)
19811.jpgAlbum 19811 lsd145-1.jpg lsd145-2.jpg lsd145-3.jpg

Parts

From the 1984 Nissan Competition Catalog:

H145A LIMITED-SLIP ASSY (TO 8/74)
* 38420-H1020 L/S ASSY
* 38423-H0120 SIDE GEAR (2)
* 38424-H0120 THRUST WASHER (1.0MM) (2)
* 38424-H0120 THRUST WASHER (1.25MM) (2)
* 38425-H0120 PINION (4)
* 38427-H0120 PINION MATE SHAFT
* 38429-H0120 PINION SHAFT
* 38430-H0120 DISTANCE PIECE
* 38431-H0120 PRESSURE RING (2)
* 38437-H0120 CENTER RING
* 38432-H0120 FRICTION PLATE (1.5MM) (2)
* 38432-H0121 FRICTION PLATE (1.45MM) (2)
* 38432-H0121 FRICTION PLATE (1.55MM) (2)
* 38433-H0120 FRICTION DISC (1.5MM) (2)
* 38434-H0120 SPRING DISC (1.5MM) (2)
* 38435-H0120 SPRING PLATE (1.5MM) (2)
* 08320-61000 SCREW (4)

H150

Nissan Performance racing parts used to sell an LSD for H150 -- as used by the 1975-1978 B210 & 1979-1982 B310, part number 38420-RS210. As of 2018, Nissan USA (parts.nissanusa.com) still shows it in the PDF catalog (page 53).
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Occasionally Nismo LSD units are still for sale:

Google search

While this photo shows a 4.375 gearset bolted to it, the LSD unit can be used with any H150 gearset
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Aftermarket H150 LSD by Car Wash
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Occasionally offered for on Yahoo Auctions Japan like this diff head with LSD installed:
H150_LSD-2.jpg H150_LSD-1.jpg

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H150 LSD Parts

Pitroad sells parts to rebuild the H150 LSD.

38433-RS210 Friction Disc (6)
38432-RS210 Friction Plate (4)
38435-RS210 Friction Plate Spring (2)
38436-RS210 Friction Disc Spring NLA

H165

Nismo

LSD 2-way with 24 x 23T splines
38420-N5020 for Type I carriers
 * H165 old type: 3.889 to 4.625 旧型 
 * H165B low-tooth: 38420-N5020 3.700 to 4.875 並歯型
38420-RS110 for Type II carriers
* H165B high-tooth: 3.154 to 4.875 高歯型

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38420-A1260 L/S ASSY (TYPE II)

RS110 - H165B
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With custom steel center
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Pitroad/TRD

Pitroad sells a brand new LSD for the H165B axle (1985-up Sunny Truck) for about $1200 USD. It is from TRD (Toyota Racing Development) and is a bolt in when using the AE86 ring gear bolts. Pitroad H165 LSD or TRD

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You can also buy the AE86 LSD (PN 41301-TA005) direct from TRD, be aware however that this is untested, and probably won't fit most H165 carriers. About $850 USD

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Special stepped bolts can be used with the M10 type H165.
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AE86 Diff Swap

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H190

H190 axle assembly from a 320 is narrower than a 1200 axle, so is a good candidate for a swap.

Nismo M-99996-T3011 $600 Detroit Locker

Nismo H190 Limited-Slip Differential units
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For North America, optional H-190 LSD for the Hardbody when equipped with the Z24 or KA24E (2WD only, Four-cylinder only).

1988-1994 (D21) & 5-1996.5 (D21U)
38420-G7020 DIFFERENTIAL ASSY LSD (OPTION)
38303-10V02 LABEL-DIFFERENTIAL "LSD"
            LABEL-DIFFERENTIAL "USE ONLY LSD OIL"

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R180

Both Nissan and Cusco sell LSD for the R180 IRS diff

Nissan 38760
38411-20R21 COUPLING ASSY-VISCOUS $584 USD
* Superseded 38411-20R14
* N14 Pulsar/Sunny JDM.SR20DET (RNN14) 1991-1994 [R180]
* M11 USA Axxess 0189-0394 4WD.KA24E.SGL.FA (R180)
* U12 Bluebird 1988-1991
* P10 Primera 1991-1995
Cusco for R180
MZ TYPE-RS No. LSD684 1.5 way Subaru BP/BL (2003-2009 Legacy/Liberty)
MZ 1-way

CA200

Nissan CA200 axle, salisbury type, is an R200 gearset in live axle form.

AC brand for 29 Spline C200 Axle
$580 USD
Will R200 LSD and VLSD fit into CA200?

Phantom Grip

Phantom Grip is an inexpensive LSD, which is spring-loaded LSD instead of the conventional clutch-pack LSD.

See main article: Phantom Grip
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Depending on how you drive a phantom can last for a long time, to my memory mic had it in a rally car for 2 years then I had it in a road car for bout the same and at the end it started slipping but just needed to be re shimmed.

POST supafatto

Torsen Diff

Torsen differential works on a gearing principal and has no friction plates:

  • Superior limited slip action, unless one wheel loses 100% traction
  • Superb for street suspension or soft racing suspension, where there is little chance of a wheel coming off the ground
  • If a wheel comes off the ground it stops working

For more information, see POST LSD vs Quaife ATB

1.5-way vs 2-way

Nismo sold both 1.5 way and 2 way LSDs. For street use, a 1.5 way is the best way to go.

The 1.5 way is a common LSD for racing as it does not give understeer on de-acceleration through cornering but gives a hard clamping force under hard acceleration, when normally you would break traction.

2-way generally causes understeer and is somewhat like a locked spool. It struggles to turn around in the street, quite similar to a welded diff, with tyres chirping and wheel spin required to get it to turn around.

Factory

Japan

LABEL-DIFFERENTIAL
38308-10V02 LSD/ノンスリシプ デフ シヨウ/リミテッド スリップ デフ シヨウ
* C22/GC22/TC22/C23,D21/WD21/D22,K30,K30S
* VE24/WE24,AC34,JR50,R33,R50,R20,Y60
38420-N9000 4-pinion
* 720 8004-8303 4-pinion 
* S110 8204- HE41.FJ20
38420-41W00 2-pinion
* 720 8004-8303 2-pinion
* 720 8303-

North America

D21 C200.Z24I.OP
D21 H233B.(VG30I+VG30E).OP
D21U
R50
S13 R200 VLSD 4WS 1990-
S14 R200 VLSD OP.
WD21
WD22
Z31 R200 VLSD, LSD
Labels:
* 'LSD'
* 'USE ONLY LSD OIL'
* 'VISCOUS LSD' 
38303-10V00 LABEL-DIFFERENTIAL 'VISCOUS LSD'
* S13 1991- R200.4WS 
38303-10V01 LABEL-DIFFERENTIAL 'LSD'
* D21 
* WD21 0889-0292 VG30E.OP
38303-10V02 LABEL-DIFFERENTIAL 'USE ONLY LSD OIL'
* D21
* D21U
* R50
* WD21 H233B+C200
* WD22 VG33E.SE+VG33ER+VG33E.OP
D21U
38420N DIFFERENTIAL ASSY-MECHANICAL LSD
38420-G7020 
38420-S9200
38420-T6070 <> 38420-T6073 [C200]

Z31 [R200]
38421S CASE SET-DIFFERENTIAL
38410-40F70 0188 VG30T.SS.MT.F5 $558 USD
* VISCOUS LSD 4-pinion RC37
38421-71S26 0487-0887 VG30T $915 USD
            0887-     VG30T.(GL+GLL)
* LSD 4-pinion RC37

Locking Diffs

A "locking" differential is another animal. When locked there is no slip -- not just limited slip, but none at all. When unlocked, it's the same as an open differential. These are used for racing or for seriously slow off-road work.

Locked diffs are also useful for circuit racing. Many race cars from all sorts of categories use locked diffs. The understeer that is apparent on street/drag cars with locked diffs can easily be eliminated with proper (race) suspension geometry. These settings (camber, castor, and toe) will not be practical for street use though.

L18_B110

There are different types of locking diffs.

Air Locker

The ARB air-locker is popular with Jeeps and other off-roaders. When the dash-mounted switch is flipped, air pressure locks the diff gears together

Detroit Locker

The "Detroit Locker" was used by some high-performance Ford vehicles in the 60s and 70s. The Locker may be the only modern road-going locking differential, as it can automatically lock and unlock. It is sort of a hybrid between an LSD and a Locker.

Spools

For drag racing, the spider gears can be replaced with a sold unit so that both axles are always locked together. This is called a "spool". It is similar to a welded diff, but is a bolt-in part made for this purpose.

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Welded Diff

The "poor man's" locking diff is to have the spider gears welded together so that it works like a spool, but is obviously cheaper. The danger is of a bad weld and having it explode on the race track.

Using a spool or welded diff gears on the street is illegal in most countries, and can be dangerous, especially in the wet. The danger is of spinning out as the wheels do not turn independently, but the inside wheel is forced along the same as the outer.

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