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Hitachi H165 differentials uses a 165mm (6.5") ring gear. One was fitted to Datsun 1200 Sunny Trucks (B120). Early (H165 pre-1973), H165B Type I (1973-1979) and H165B Type II (from July 1979). The gear sets do not interchange between the various Types.

1 Datsun 1200 Factory H165
2 Gasket
3 Alloy Carrier
4 Nissan Competition
5 Swaps
6 Donor Cars
7 Part Sources

Datsun 1200 Factory H165

Datsun B120 (1200 Sunny Truck) gear sets - H165 (HC41)
H165 
* 38100-28500 4.111 HYPOID GEAR & PINION SET (37/9) (to '72-12)
H165B Type I carrier
* 38100-N5200 4.111 HYPOID GEAR & PINION SET (37/9) (from '73-1 to 7906)
H165B Type II carriers
* 38100-W9000 4.111 GEAR SET-FINAL DRIVE 7907-8605
* 38100-G3300 4.111 GEAR SET-FINAL DRIVE 8605-

Gasket

Center section gasket for H165 carrier.

38320-N5000AS Gasket-carrier $4.27 USD
- supersedes 38320-04110 GASKET-GEAR CARRIER H165

Compare to:

38320-B3002 Gasket-cover H190 $4.13 USD

Alloy Carrier

The real advantage of an alloy diff is in the reduced unsprung mass, which is particularly important in a light car like a 1200.

Rare alloy H165 carrier - from 1967 Datsun 510 Bluebird (Series 1) Australia

USA Datsun Roadster - 1500 SP310, 3.88 ratio, 23 spline side gears

Nissan Competition

Also see H165 Conversion Listing

Page 29 of 1984 catalog

H165B RING & PINION SETS (TYPE I)

The ring and pinion sets listed below will fit the 710 (from 4/73), HL510 (to 6/79) and 200SX/S10.

38100-N4905 3.545 R&P SET
38100-N5000 3.700 R&P SET
38100-N5100 3.900 R&P SET
38100-N5200 4.111 R&P SET
38100-N5300 4.375 R&P SET
38100-N5400 4.625 R&P SET
38100-N5505 4.875 R&P SET

H165B RING & PINION SETS (TYPE II)

The ring and pinion sets listed below will fit the HL510 (from 7/79) and 200SX/S110 (to 6/81).

38100-W8600 3.364 R&P SET
38100-W8700 3.545 R&P SET
38100-W8800 3.700 R&P SET
38100-W8900 3.900 R&P SET
38100-W9000 4.111 R&P SET
38100-W9108 4.375 R&P SET
38100-W9208 4.625 R&P SET
38100-W9300 4.875 R&P SET

H165B LIMITED-SLIP ASSY

38420-N5020 L/S ASSY (TYPE I) 710 (from 4/73), HL510 (to 6/79) and 200SX/S10
38420-A1260 L/S ASSY (TYPE II) HL510 (from 7/79) and 200SX/S110 (to 6/81)
38423-N5020 SIDE GEAR (2)
38425-18000 PINION (4)
38427-21010 SHAFT
38431-21010 PRESSURE RING (2)
38432-21010 FRICTION PLATE (1.65MM) (4)
38433-21010 FRICTION DISC (1.65MM) (4)
38433-21011 FRICTION PLATE (1.90MM) (4)
38434-E4610 SCREW (4)
38435-21010 SPRING PLATE (1.65MM) (2)
38436-21010 SPRING PLATE (1.65MM) (2)

H165 AXLES BAFFLES These baffles can be installed in any Datsun equipped with an H165 rear axles assembly. They are designed to contain the differential oil in the center section.

43015-H7920 AXLE BAFFLE/RH
43016-H7920 AXLE BAFFLE/LH

DIFFERENTIAL OIL COOLER ASSY
21660-P9000 OIL PUMP ASSY
21664-P9000 BRACKET/OIL PUMP
21652-P9000 OIL COOLER ASSY

Swaps

Swapping an H165 into a 1200 can be great to match larger engine swaps. Sometime H165 is fitted because LSDs are more available for the H165 than for the H145 or H150.

See: Diff Widths

Datsun B110 (H145): 51.36 in (1305 mm) or 1185 mm axle flange-to-flange (less brakes) 
Datsun B310 (H150): 53.5 in (1360 mm) 
Datsun C20 Vannette: around 1400mm (105mm wider than a 1200) 
Datsun V510: 53 in (H165 wagon)
Datsun A10 wagon (leaf type) 49" between backing plates. Estimated 53" axle wheel flange to flange.

The best swap candidate for Datsun 1200 is the H165 assembly from a Datsun 1200 Truck (B120). But they are not direct bolt-ins, as the spring mounts, shock mounts and brake lines/cables are slightly different. Some minor fabrication is needed.

Likewise for Datsun 510 axle swaps.

Datsun A10 axle is only 2 inches wider, so use postive offset (FWD) wheels to make up the difference. A10 has 4-link mounts, unless you get the wagon version which is leaf sprung.

Donor Cars

Available from production vehicles: 3.3, 3.5, 3.7, 3.9, 4.1, 4.4, & 4.875 reference: diff ratios

Australia

You can get 4.1:1 and 4.875:1 ratios quite easy, it is the same diff that Bluebirds (rwd Maxima) and C20 (Datsun Vanette) -- some with aluminum centers -- and some 4wd Datsun Pickup (non-1200 ute) front diffs (those are wider assemblies, though, so just use the center section).

* A10 Stanza/HL510 (1978-1982): 3.7:1
* 180B (610) wagon: 3.89:1
* Series 1 Bluebirds (810): 3.89:1
* Series 3 Bluebird wagon (910): 3.89:1

C120 Vanette

C120 Ratios

North America

1500 Roadster

Datsun Fairlady 1500 roadster used an H165 diff. The 1600 and 2000 used a H190.

38100-10400 SET-GEAR, hypoid drive (35 : 9) [3.889] SP310/SPL310
38423-04101 GEAR-side, differential bevel (2)

610

610 Wagons came with a leaf-sprung rigid axles with H165 differential.

38310-A6100 ASSY-CARRIER -0373
38310-N5000 ASSY-CARRIER 0473-
38310-N5000 ASSY-CARRIER AUTO 0873-

38100-29000 SET-HIPOID GEAR & PINION (35/9) -0373
38100-N5100 SET-HYPOID GEAR & PINION, 35/9 0473-0773
38100-N5100 SET-HYPOID GEAR & PINION, 35/9 (AUTO) 0873-0874

710

710 from 4/73 (TYPE I)

38100-N5100 SET-HYPOID GEAR & PINION, 35/9, 3.889 MANUAL -0874 WAGON
38100-N5000 SET-HYPOID GEAR & PINION, 37/10, 3.700 MANUAL 0974- WAGON
38100-N5200 SET-HYPOID GEAR & PINION, 37/9, 3.700 AUTO -0874 WAGON
38100-N5100 SET-HYPOID GEAR & PINION, 35/9, 3.889 AUTO 0974- WAGON

Sedan & Coupe
38100-29000 SET_HYPOID GEAR & PINION, 35/9, 3.889 MANUAL -0373
38100-N5100 SET-HYPOID GEAR & PINION, 35/9, 3.889 MANUAL 0473-0874
38100-N5000 SET-HYPOID GEAR & PINION, 37/10, 3.700 MANUAL 0974-
38100-28500 SET_HYPOID GEAR & PINION, 37/9, 3.700 AUTO -0373 
38100-N5200 SET-HYPOID GEAR & PINION, 37/9, 3.700 AUTO 0473-0874
38100-N5100 SET-HYPOID GEAR & PINION, 35/9, 3.889 AUTO 0974-

38320-04110 GASKET-GEAR CARRIER

S10

1977-1978 Datsun S10 (Silvia/200SX) TYPE I

38100-N5100 HYPOID SET-GEAR & PINION (35/9), 3.889 MANUAL
38100-N5000 HYPOID SET-GEAR & PINION (37/10), 3.700 AUTO

A10

1978-1981 Datsun A10 (510/Stanza/HL510)

to 6/79 TYPE I
from 7/79 TYPE II

38300-W8700 FINAL DRIVE ASSY, 3.545 CANADA 0779-0680
38300-W8600 FINAL DRIVE ASSY, 3.364 CANADA 0780-
38300-W8600 FINAL DRIVE ASSY, 3.364 USA 0779-

These are very similar to the setup in the Datsun B310 (Sunny/210) and so are good swap donor for the Sunny. They come in 4-link for the sedan/coupe, same as Sunny sedan/coupe and all North America Datsun 210s.

S110

1979-1982 Datsun 200SX/Silvia to 6/81

North American models were fitted with H190 starting in 7/81

H165 models

* 38100-W8800 GEAR SET-FINAL, 3.700 0179- Z20E+Z22E
* 38100-W8800 GEAR SET-FINAL, 3.700 0880- Z22E.MT
* 38100-W8900 GEAR SET-FINAL, 3.898 0880- Z22E.AT

Part Sources

Nissan
Nismo
Pit Road
- LSD Nismo P/N 38420-RS110
DatRats

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H165

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