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[Datsun 1200 encyclopedia]

Rear Axle

Revision as of 07:33, 25 July 2010; view current revision
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Category: Rear Axle And Rear Suspension

The Datsun 1200 used a leaf-spring live axle with an H145 differential. This is a Hitachi design with 145mm ring gear (5.71 inch). It is a lightweight unit suitable to handle the torque from an A12 engine. Light weight is good, remember that heavy parts take more horsepower to accelerate. Some Australian-assembled B110s used a Borg Warner Model 60 rear axle.

5522.jpg H145 vs. H150

Also see Rear Axle Swaps.

Contents

Differential

The Differential is the part in the center of the rear axle assembly. Also known as the "Gear carrier assembly", "pumpkin", "center" or CR&P (Crown Ring and Pinion). It has two purposes: 1) reduce the speed ("rear gearing") and 2) equalize power distribution to left and right wheels even when turning corners (differential).

Specifications

Also see: Rear Suspension Specifications

  • 3.90:1 ratio - sedans and coupes
  • 4.11:1 ratio - VB110 wagons with aluminum gear case
  • 4.11:1 ratio - B120 Truck
  • Ring gear diameter: 145mm (5.71 inch)
  • Torque Rating: about 100 lb. ft.
  • Axle assembly width: 1305 mm drum-to-drum


Weight

  • H145: 42kg
  • H165: 52kg

Maintainence

The stock Datsun 1200 differential is a reliable, long lasting part behind an A12 or A13 engine.

  1. As long as it doesn't run dry on gear lube it will usually last forever. So check it every few months for signs of leaking.
  2. The only common maintainence is to pack the rear wheel bearings every two years or so. This will also keep the bearings quiet and reduce gear lube leakage into the brake area.


Differential Lubricant

Since the differential is a typical hypoid-gear unit, you can use any lubricant designed for such:

  • the traditional "90 weight" gear oil
  • the newer 75W-140 or 85W-140 multi-weight gear oil

For maximum fuel economy, use a modern multi-weight gear oil. Otherwise use this chart to select a single-weight oil:
22187.jpg 

1972 Nissan Specification
* API GL-4 
* MIL-L-2105 

Such as:
* Chevron Multiservice Gear Lub. 75,80,90,140
* Esso Gear Oil GP 80,90,140
* Mobil Mobilube EP or GX 80-90,90,140
* Shell Spirax 75EP,80EP,90EP,140EP
* Sunoco Multipurpose Gear Lub. GL-4 80,90,140
* Texaco Universal Gear Lub. EP 80,90,140

1972 USA Owners manual (Page 23)

00_cover.jpg 23.jpg
Recommended Lubricants

GL-4 vs GL-5

The differential can use a GL-4 oil, same as the transmission lube.

GL-5 is now recommmended for the differential, but should not be used in the gearbox unless it is marked both GL-4 AND GL-5. 

Nissan 1981 Specification
* API GL-5

Borg Warner Model 60

Australian-assembled B110s used a Borg Warner Model 60 rear axle, starting in Late 1971.

See main article: Borg Warner Differential


Leaf Spring Mounting

Rear axle mounting and Shocks


[3772.jpg


Spring Seat Assembly

Pickup

  • 55262-G1000 SEAT ASSY-REAR SPRING, LOWER RH 1974-up JDM B120
  • 55266-G1000 SEAT ASSY-REAR SPRING, LOWER LH 1974-up JDM B120

Sedan

  • 55262-H1001 SEAT-rear suspension, lower JDM Sedan

Van

  • 55262-H1401 SEAT-rear suspension (R.H), lower JDM Van
  • 55266-H1401 SEAT-rear suspension (L.H), lower JDM Van

Coupe

  • 55262-H1801 SEAT-rear suspension (R.H), lower JDM Coupe
  • 55266-H1801 SEAT-rear suspension (L.H), lower JDM Coupe


U-bolts

  • 55247-H1001 CLIP-rear spring JDM ALL (except van)
  • 55247-H1401 CLIP-rear spring JDM Van
  • 55247-G1000 CLIP-REAR SPRING JDM B120 7510- [4-leaf packs]
  • 55247-G1060 CLIP-REAR SPRING JDM B120 HARD 7804- [Heavy 5-leaf packs]


18451.jpg

Swapping

Datsun 1200 Coupe, sedan, van, and ute housing are all just slightly different. 

discussion in main forum

Sedan axle housing has no welded-on leaf perches. The others do. Plus other small differences.

Gear Sets 

B10 Datsun 1000 H145 alloy carrier
38310-18000 COMP.-CARRIER, gear ALL
* 38315-18000 STUD (fixing differential bearing cap) 4 ALL
* 38317-18000 WASHER (fixing differential bearing cap) 4 ALL
* 38318-18000 NUT (fixing differential bearing cap) 4 ALL

B10 Datsun 1000 H145 gear sets (will fit all Datsun 1200)
38100-18000 JDM SET-GEAR, hypoid with pinion (37 T: 9 T) [4.11] Sedan & Coupe
38100-H0700 JDM SET-GEAR, hypoid with pinion (35 T: 8 T) [4.375] Van
* superceded 38100-18100 
38100-15400 JDM SET-GEAR, hypoid with pinion (37 T: 8 T) [4.625] Truck
38100-G0400 JDM SET-GEAR, hypoid with pinion (37 T: 8 T) [4.625] Truck (from '69-Nov)

Datsun 1200 gear sets
38100-H1000 3.900 R&P SET 
38100-H1100 4.111 R&P SET


Differential Repair

Replacing diff bearings or spider gears? Or ring & pinion? The procedure for re-assembly the differential gear carrier is very complicated. Be sure to get the factory service manual.

We recommend: Just swap the whole center section "pumpkin" from a 1971-1973 B110 or 1974 B210 in there. It will be cheaper and certainly easier, someone has one for free. The center section rarely goes bad unless the diff runs low on oil, so your chances of getting a good used one are high.

Yes, B110 and 1974 B210 center section is identical. You could also swap a 1975-1978 pumpkin they say you need a 2mm spacer between the pumpkin and the housing.

Part Numbers

Suppliers - USA

Axle

See Axle Shaft

Differential

Differential Side Bearing

O.D: 62mm

Schuck's

RockAuto.com

  • TIMKEN Part # 30206M - $14.96
  • BCA/NATIONAL Part # 30206 - $16.74

BCA_TAPRA.SE.001_ANG.JPG


Application:
- Alfa
- Mitsubishi
- Ford
- Mazda
- Nissan
- Plymouth
- Porsche
- Subaru
details


Specs:
Taper Bearing Assembly
O.D: 62mm (2.4409")
I.D: 30mm (1.1811 in.)
Width: 17.25mm

Pinion Seal


B110, through 1974 model year B210. Probably fits B10 as well.

  • 38189-18000 SEAL-OIL DRIVE PINION
  • SKF Oil Seal #550219 Partsamerica.com $22.99


Pinion Bearing

  • 38120-18000 ASSY-BEARING DRIVE PINION REAR
  • 38140-18000 ASSY-BEARING DRIVE PINION FRONT


Fits many cars, GM, Nissan, Isuzu, Mazda, Opel, etc
Taper Bearing Assembly: Cone Length=0.7874" Bore=1.1811" Outer Diameter=2.4409" Width=0.8366" Cup Length=0.6693" Cone Radius=0.06" Cup Radius=0.06"}
Rockauto

  • BCA/NATIONAL Part # 32206 - $19.84

Partsamerica

  • SKF BR32206 - $18.99
  • 38165-H1001 SPACER-DRIVE PINION BEARING $17.00
  • 38154-G04xx WASHER-ADJUSTING DRIVE PINION $3.83 USD

Where xx = 00 through 17 for different thicknesses

  • 38154-G0400 WASHER-ADJUSTING DRIVE PINION T=2.74
  • 38154-G0401 WASHER-ADJUSTING DRIVE PINION T=2.77
  • 38154-G0402 WASHER-ADJUSTING DRIVE PINION T=2.80
  • 38154-G0403 WASHER-ADJUSTING DRIVE PINION T=2.83
  • 38154-G0404 WASHER-ADJUSTING DRIVE PINION T=2.86
  • 38154-G0405 WASHER-ADJUSTING DRIVE PINION T=2.89
  • 38154-G0406 WASHER-ADJUSTING DRIVE PINION T=2.92
  • 38154-G0407 WASHER-ADJUSTING DRIVE PINION T=2.95
  • 38154-G0408 WASHER-ADJUSTING DRIVE PINION T=2.98
  • 38154-G0409 WASHER-ADJUSTING DRIVE PINION T=3.01
  • 38154-G0410 WASHER-ADJUSTING DRIVE PINION T=3.04
  • 38154-G0411 WASHER-ADJUSTING DRIVE PINION T=3.07
  • 38154-G0412 WASHER-ADJUSTING DRIVE PINION T=3.10
  • 38154-G0413 WASHER-ADJUSTING DRIVE PINION T=3.13
  • 38154-G0414 WASHER-ADJUSTING DRIVE PINION T=3.16
  • 38154-G0415 WASHER-ADJUSTING DRIVE PINION T=3.19
  • 38154-G0416 WASHER-ADJUSTING DRIVE PINION T=3.22
  • 38154-G0417 WASHER-ADJUSTING DRIVE PINION T=3.25

Limited Slip

Datsun 1200 was not offered with a limited-slip differential, however Datsun Competition sold an LSD for the H145. This part is NLA, however it may be found occasionally in specialty shops or on eBay.

Nissan Competition

From the 1984 Nissan Competition Catalog

  • H145A RING & PINION SET (TO 8/74)
    • 38100-H1000 3.900 R&P SET
    • 38100-H1100 4.111 R&P SET
    • 38100-H0700 4.375 R&P SET
    • 38100-G0400 4.625 R&P SET
  • H145A DIFFERENTIAL ASSY
    The H145A 3rd members will fit the 1200 and B210 (to 8/74) and do not include limited slip units.
    • 38300-H1000 3.900 3RD MEMBER
    • 38300-H1100 4.111 3RD MEMBER
    • 38300-H0700 4.375 3RD MEMBER
    • 38300-G0500 4.625 3RD MEMBER

Unformatted Nissan Parts List

Nissan North America

  • B210 01551-00111 CLIP-BRAKE TUBE 2 -
  • B210 01551-00121 CLIP-BRAKE TUBE 1 0874-
  • B110 08912-43810 NUT-HEX SELF LOCK 8 -
  • B210 08912-43810 NUT 8 -
  • B110 08915-23810 WASHER-SPRING LOCK 8 -
  • B210 08915-23810 WASHER-LOCK 8 -
  • B110 32103-14600 ASSY-PLUG DRAIN 1 -
  • B210 32103-14600 ASSY-PLUG,DRAIN 1 -
  • B210 32103-U8400 ASSY-PLUG,DRAIN 1 - 2 32103-14600
  • B310 32103-U8401 PLUG ASSY-DRAIN 1 -
  • B110 38162-G0300 ASSY-SHAFT REAR AXLE 2 -
  • B210 38162-G0300 ASSY-SHAFT,REAR AXLE 2 -
  • B310 38162-H8500 SHAFT ASSY-REAR AXLE(L=612) 2 -
  • B110 38322-55100 ASSY-BREATHER 1 -
  • B210 38322-55100 ASSY-BREATHER 1 -
  • B310 38322-55100 BREATHER-REAR AXLE CASE 1 -
  • B110 40222-18000 BOLT-HUB ROAD WHEEL 8 -
  • B210 40222-18000 BOLT-HUB ROAD WHEEL 8 -
  • B310 40222-18000 BOLT-HUB ROAD WHEEL 8 -
  • B110 40225-27700 NUT-ROAD WHEEL 1 16 -
  • B110 40300-H1001 ASSY-ROAD WHEEL 4JX12 3 DELUXE -
  • B110 40310-H1772 SET-TIRE & TUBE 6.00-12-4PR WITHE FMVSS 3 OP -
  • B110 40310-H1928 TIRE 6.00-12-4PR SNOW FMVSS 3 OP -
  • B110 40310-H1940 SET-TIRE & TUBE 155SR12 RADIAL FMVSS 3 OP -
  • B110 40312-H1922 TIRE 6.00-12-4PR FMVSS 3 -
  • B110 40315-H1100 COVER-ROAD WHEEL 2 DELUXE (OP STD) -
  • B110 40315-H1800 COVER-ROAD WHEEL 2 OP COUPE -
  • B110 40315-H1801 COVER-ROAD WHEEL (MEXICO MADE) 2 COUPE 0872- 5 40315-H1800
  • B110 40321-18000 WEIGHT 10G WHEEL BALANCE 0 -
  • B110 40321-H1000 WEIGHT 10G WHEEL BALANCE 0 - 2 40321-18000
  • B110 40322-18000 WEIGHT 20G WHEEL BALANCE 0 -
  • B110 40322-H1000 WEIGHT 20G WHEEL BALANCE 0 - 2 40322-18000
  • B110 40323-18000 WEIGHT 30G WHEEL BALANCE 0 -
  • B110 40323-H1000 WEIGHT 30G WHEEL BALANCE 0 - 2 40323-18000
  • B110 40324-18000 WEIGHT 40G WHEEL BALANCE 0 -
  • B110 40324-H1000 WEIGHT 40G WHEEL BALANCE 0 - 2 40324-18000
  • B110 40325-18000 WEIGHT 50G WHEEL BALANCE 0 -
  • B110 40325-H1000 WEIGHT 50G WHEEL BALANCE 0 - 2 40326-18000
  • B110 40326-18000 WEIGHT 60G WHEEL BALANCE 0 -
  • B110 40326-H1000 WEIGHT 60G WHEEL BALANCE 0 - 2 40326-18000
  • B110 40327-18000 WEIGHT 70G WHEEL BALANCE 0 -
  • B110 40327-H1000 WEIGHT 70G WHEEL BALANCE 0 - 2 40327-18000
  • B110 40328-18000 WEIGHT 80G WHEEL BALANCE (NOT ADOPTED 0 -
  • B110 40329-18000 WEIGHT 90G WHEEL BALANCE (NOT ADOPTED 0 -
  • B110 40330-18000 WEIGHT 100G WHEEL BALANCE (NOT ADOPTED 0 -
  • B110 40360-H1000 CHAIN-TIRE 4 OP COUPE -
  • B110 43010-H1002 COMP-CASE REAR AXLE 1 SEDAN -1172 2
  • B110 43010-H1003 COMP-CASE REAR AXLE 1 SEDAN 1272-0573 32 43010-H1002
  • B110 43010-H1004 COMP-CASE REAR AXLE 1 SEDAN 0673- 5 43010-H1003
  • B110 43010-H1404 COMP-CASE REAR AXLE 1 COUPE 0673- 5 43010-H1803
  • B110 43010-H1802 COMP-CASE REAR AXLE 1 COUPE -1172 2
  • B110 43010-H1803 COMP-CASE REAR AXLE 1 COUPE 1272-0573 32 43010-H1802
  • B210 43010-H5001 COMP-CASE,REAR AXLE 1 SEDAN -874 4
  • B210 43010-H5025 COMP-CASE,REAR AXLE 1 SEDAN -874 42 43010-H5001
  • B210 43010-H5501 COMP-CASE,REAR AXLE 1 COUPE -874 4
  • B210 43010-H5525 COMP-CASE,REAR AXLE 1 COUPE -874 42 43010-H5501
  • B210 43010-H7250 COMP-CASE,REAR AXLE 1 SEDAN 0974- 0 43010-H5025
  • B210 43010-H7350 COMP-CASE,REAR AXLE 1 COUPE 0974- 0 43010-H5525
  • B310 43010-H8550 CASE COMP-REAR AXLE 1 SEDAN,COUPE,WAGON - 2 43010-H8500
  • B110 43036-10601 SHIM-REAR AXLE CASE END 0 SEDAN COUPE -
  • B110 43036-H5000 SHIM-REAR AXLE CASE END 0 SEDAN COUPE 0673-1172 25 43036-10601
  • B210 43036-H5000 SHIM-REAR AXLE CASE END T=0.075 0 -
  • B310 43036-H5000 SHIM-REAR AXLE CASE END (T=0.075) 0 -
  • B310 43036-H5001 SHIM-REAR AXLE CASE END (T=0.15) 0 -
  • B310 43036-H5002 SHIM-REAR AXLE CASE END (T=0.25) 0 -
  • B310 43036-H5003 SHIM-REAR AXLE CASE END (T=0.3) 0 -
  • B110 43059-A1600 PLUG-TAPER SQUARE SOCKET 1 -
  • B210 43059-A1600 PLUG-TAPER SQUARE SOCKET 1 -
  • B310 43059-A1600 PLUG-FILLER 1 -
  • B110 43063-18001 BOLT-FIX REAR BRAKE DISC 8 -
  • B210 43063-18001 BOLT-FIX REAR BRAKE DISC 8 -
  • B110 43065-10600 CLIP-BRAKE TUBE 2 -
  • B110 43066-22500 SEAT-CONNECTOR BRAKE HOSE 1 -
  • B210 43066-22500 SEAT-CONNECTOR BRAKE HOSE 1 -
  • B110 43067-H0100 STUD-GEAR CARRIER FIX 8 -
  • B210 43067-H0100 STUD-GEAR CARRIER 8 -874 4
  • B310 43070-01L00 SPACER-REAR AXLE BEARING 2 - 2 43070-H5000
  • B110 43070-04101 SPACER-REAR AXLE BEARING 2 -1172 2
  • B110 43070-H5000 SPACER-REAR AXLE BEARING 2 1272- 2 43070-04101
  • B210 43070-H5000 SPACER-REAR AXLE BEARING 2 -
  • B310 43070-H5000 SPACER-REAR AXLE BEARING 2 -
  • B210 43096-G0300 CAP-BREATHER 1 -
  • B310 43096-G0300 CAP-AIR BREATHER 1 -
  • B110 43206-18000 DRUM-BRAKE 2 -
  • B210 43206-18000 DRUM-BRAKE 2 -
  • B310 43206-18000 DRUM-BRAKE 2 -
  • B110 43215-18000 BEARING-REAR AXLE 2 SEDAN COUPE -
  • B110 43215-H5000 BEARING-REAR AXLE 2 SEDAN COUPE 0673-1172 25 43215-18000
  • B210 43215-H5000 BEARING-REAR AXLE 2 -
  • B310 43215-H5000 BEARING-REAR AXLE 2 -
  • B110 43236-18000 CATCHER-GREASE LH 1 -1172 2
  • B110 43236-H5000 CATCHER-GREASE 2 1272- 2 43236-18000
  • B210 43236-H5000 CATCHER-GREASE 2 -
  • B110 43237-18000 CATCHER-GREASE RH 1 -1172 2
  • B110 43239-04100 PACKING-GREASE CATCHER 2 -1172 2
  • B110 43239-H5000 PACKING-GREASE CATCHER 2 1272- 2 43239-04100
  • B210 43239-H5000 PACKING-GREASE CATCHER 2 -
  • B210 43242-H5001 CATCHER-GREASE 2 - 2 43236-H5000
  • B110 43252-18000 SEAL-OIL REAR AXLE SHAFT 2 -
  • B110 43252-H1000 SEAL-OIL REAR AXLE SHAFT 2 0372- 2 43252-18000
  • B210 43252-H1000 SEAL-OIL,REAR AXLE SHAFT 2 -1176 6
  • B210 43252-H1010 SEAL-OIL,REAR AXLE SHAFT 2 1276- 2 43252-H1000
  • B310 43252-H1010 OIL SEAL-REAR AXLE SHAFT 2 -
  • B110 43255-18000 COLLAR-REAR AXLE BEARING 2 -
  • B110 43255-H1000 COLLAR-REAR AXLE BEARING 2 1271- 2 43255-18000
  • B210 43255-H1000 COLLAR-BEARING,REAR AXLE SHAFT 2 -
  • B310 43255-H1000 COLLAR-BEARING,REAR AXLE SHAFT 2 -
  • B210 44005-U1400 BOLT-FIX REAR BRAKE DISC 8 - 2 43036-18001

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