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[Datsun 1200 encyclopedia]

71-Series Transmission

From Datsun 1200 Club

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Category: Transmission Modifications

The 71 transmission is Nissan's strongest transmission. It was fitted to L-series six cylinders, FJ engines and more. 71 series comes in four different lengths, however a stumpy version is the same length as a Datsun 1200 transmission though obviously much larger around. The stronger 71B replaced the original 71A designs in the 1970s.

Contents

Overview

The 71-series has the mainshaft and countershaft 71 mm apart. This larger transmission is thus stronger than the 56-series used in the Datsun 1200, and stronger than the 63-series used in some A14-powered B210s. The C revision boxes (FS5W71C) was used with 3-liter V6 engines.

th_ipodphotos212.jpg

Although the Nissan 90-Series Transmission was rated higher, experience shows that the 71C is practically just a as durable even behind a 300ZX turbo (see Gearbox Strength).

While never offered in an A-series version (it would be overkill even for a supercharged A-engine), the 71 is a good choice for larger Engine Swaps.

71 series is also the size of the Datsun 1200 Automatic Transmission (L3N71B), so a 1200 automatic Tunnel should fit them.


Transmission Parts Codes:

  • 32010 TRANSMISSION ASSEMBLY

Lengths

Long extension housing is the most common.

Overall Transmission Assy Length
Long tail #1: 31.5 inches
Long tail #2: ? inches
Tail #3: ? inches
Short tail: 26.3 inches (stumpy)

Stumpy

  • 71-Series Transmission
    • Skyline DR30 (FJ20 engine with 71C)
    • Datsun 720 pickup USA (71B)


Skyline DR30 transmission
22930.jpg

th_ipodphotos243.jpg


71 Original

F4W71

Short 4-speed with flanged output

  • 1969-1972 Datsun 521 with L16 engine


Short 4-speed with sleeve-yoke output

  • 1972-1973 Datsun 620 with L16 engine


Long 4-speed


71A

F4W71A Long housing

  • 1969-1971 240Z 4-speed


FS5C71A Long housing

  • Removable bell housing
  • Datsun Roadster with U20 bell
  • Datsun Roadster with R16 bell
  • Datsun 240Z early USA dealer installed with L-series bell


71B

Look for 71B cast into the transmission case.

F4W71B

Short housing

  • Datsun 720 with Z-series engine (short 26.3")


(1972-1982) long housing. Rear extension of transmission has bolt-on cover plate.

  • 1972-1973 Datsun 240Z
  • 1974 Datsun 260Z
  • 1975-1978 Datsun 280Z
  • 1979 Datsun 280ZX
  • Datsun 610
  • 1977-1980 Datsun 810 L-series six-cylinder
  • 1974-1979 Datsun 620 with L18 or L20B engine
  • 1979 Datsun 720 with L20B engine
  • 1980-1982 Datsun 720 with Z-series engine (long 31.5")

FS5W71B

Long extension housing

  • Datsun 200SX (S110) with Z20 engine
  • Datsun Maxima (810) with LD28 diesel
  • Nissan 720 with SD diesel
  • Nissan 200SX with CA18ET engine
  • Datsun 720 long tail
  • 1977-80 Datsun 280Z
  • 1979 280ZX (non-Turbo)
  • Datsun 810
  • Datsun 620


Short extension housing


Engines
L-series (various)
Z-series (S110)
LD28 diesel (Maxima)
SD diesel (Nissan 720)
CA18ET (Nissan 200SX)

71C

FS5W71C - The 71C has a different shifter than the 71B and all versions are longer than the 71B. A 71B front housing can be swapped.

NORTH AMERICA
1983- Nissan 300ZX (non-turbo, turbo uses 90-series)
1986-1989 Nissan D21 (Hardbody) with Z-series engine
1989- Nissan D21 (Hardbody) with KA-series engine
Pathfinder/Xterra/Frontier with KA-series engines
Pathfinder/Xterra/Frontier with VG-series (V6) engines
Engines
VG-series (V6)
KA-series
Z-series

Interchange

Like transmission parts interchange:

  • 71A bell housings
  • 4-speed to 4-speed
  • 5-speed to 5-speed
  • 71B/71C front cases

Complete transmission units of the same length interchange. For example, replacing a shorty FS5W71B with a shorty FW471.

L-series and Z-series/KA-series use the same bell patttern -- BUT the L-series is a slant engine. So while the transmissions will physically bolt on, use the Z-/KA front case with the Z-series engines, and the L-series front case with the L-series engines. OR, you can bend the gearshift to the appropriate angle, but you risk transmission oil leaking out.

Sources

Europe

D21

D21 KING CAB EUR 2WD MT KA24, Z20, TD25
FS5W71C
32010-07G63 0586-1087 Z20
32010-56G00 0492-1292 Z20S <> 32010-56G01
32010-56G01 1292-0594 Z20S <> 32010-2S400
32010-25G02 1087-0492 TD25 <> 32010-05G63
32010-56G10 0492-1292 TD25 <> 32010-56G11
32010-56G11 1292-1095 TD25
32010-1S800 1095-
REAR EXTENSION ASSY 
32130-05G11 0594-
32130-05G10 0895- <5> 32130-05G11

North America

720

The north america parts catalog lists the following.

WHEELBASE
LONG (includes King Cab)
REG 2575 mm (101.4")

32010 TRANSMISSION ASSEMBLY
32100 CASE ASSY-TRANSMISSION
32110 COVER ASSY-FRONT
23138 PLATE-ADAPTER
32130 EXTENSION ASSY-REAR

  • L20B used from introduction 0679-0680
  • SD22 Diesel 0679-1082
  • SD25 Diesel 1182-
  • Z22 from 0880-1082
  • Z20 from 1182-0784
  • Z20 from 0784-
  • Z24 from 1182-0784
  • Z24 from 1183-
  • Z24 from 0784-
  • Z24I from 0485- (I = central fuel injection)
L20B 4-speed + 5-speed
0679-1179 Aluminum Front Cover
1279-1082 Aluminum Front Cover
1179-1082 Cast Iron Front Cover
Cast Iron Front Cover
L20B later (some)
SD25

D21

USA
REAR EXTENSION ASSY - F5
32130-05G11 0487-     Z24/SD25/KA24E
32130-05G10 1185-0487 Z24/SD25

Tail Housings

EXTENSION ASSY-REAR

12"

  • 32130-E9912/32130-E9957 Z24 2WD 0784- (except CAL STD)


16"

  • 32130-E9801
  • 32130-E9802
  • 32130-E9407


??"

  • 32130-E9803 L20B 1279-0680
  • 32130-E9408
  • 32130-E9311
  • 32130-E9321
  • 32130-E9302
  • 32130-54W10
  • 32130-45W10
  • 32130-54W10
  • 32130-45W02
  • 32130-45W01
??
MAIN SHAFT 71C 
[shifter positioned forward]
 32241-95P00/95P01/95P09 <5,7> 
  RB20 GEARBOX
  32130-73L00 EXTENSION HOUSING
[shifter positioned rearward]
 32241-91P00/32241-50F00/32241-V5010/32241-V5270 <7,7>
 * S13 JAP,USA
 * Z31 USA

4-speeds

L20B

F4W71B 4-speeed for L20B

  • 32010-44W05 FED 2WD long + 4WD regular
  • 32010-45W05 CAL 2WD long + 4WD regular
  • 32010-B9860 CAL 2WD regular
  • 32010-B9960 FED 2WD regular

Z22

F4W71B 4-speed for Z22 engine

  • 32010-05W00 2WD regular
  • 32010-46W00 4WD [both wheelbase]
  • 32010-Q4900 Heavy Duty [both wheelbase]

5-speeds

L20B

FS5W71B

0679-0680

  • 32010-44W06/32010-44W16 King Cab 4WD FED
  • 32010-45W06 King Cab 4WD CAL


0679-1179

  • 32010-B9910/32010-B9912 King Cab 2WD + non-KC CAL
  • 32010-B9911 King Cab 2WD + non-KC CAL FED


1279-0680

  • 32010-B9912 King Cab 2WD + non-KC CAL
  • 32010-B9913 King Cab 2WD + non-KC FED


Z-Series

Z20

  • 32010-61W01 1182-0784
  • 32010-82W01/32010-82W15 0784-


Z22

  • 32010-05W10 0780-1082 2WD
  • 32010-18W00/32010-46W10 4WD


Z24 OPTION FS5W71B with 16" extension housing

  • 32010-20W16/32010-20W15 King Cab + 2WD 0784-


Z24

  • 32010-55W06/32010-55W10 4WD 0183-


Z24 12-inch extension

  • 32010-80W15/32010-80W16 2WD 0784-


Z24I

  • 32010-90W00 0485-
  • 32010-90W15 0485-
  • 32010-90W16 0485- 4WD

SD Engine

  • 32010-V2400/32010-Y8401 SD22 0679-1082
  • 32010-19W15 SD25 1182-

Ratios

C = Servo type synchros
W = Warner type synchros

22984.jpg

1984-1998 gearset FS5W71C e.g: 300ZX USA

  • 1st: 3.321
  • 2nd: 1.902
  • 3rd: 1.308
  • 4th: 1
  • 5th early 0.759
  • Reverse: 3.382


1980-1983 gearset mid/close e.g: 280ZX USA

  • 1st: 3.062
  • 2nd: 1.858
  • 3rd: 1.308
  • 4th: 1
  • 5th early 0.773
  • 5th late: 0.745
  • Reverse: 3.026


1976-1979 gearset wide/ratio e.g: JDM 810 Bluebird

  • 1st: 3.321
  • 2nd: 2.077
  • 3rd: 1.308
  • 4th: 1
  • 5th early 0.864
  • 5th late: 0.816
  • Reverse: 3.382


Input Drive

  • 22 teeth main shaft
  • 31 teeth counter gear
  • input ratio = 31/22 = 1.409

Overdrive (5th)

  • 19/31 main/counter * input = 0.864 (810 -7806)
  • 22/38 main/counter * input = 0.816 (810 7806-)


4th

  • 1:1 (direct drive)


3rd

  • 26/28 teeth main/counter * input = 1.308


2nd

  • 28/19 teeth main/counter * input = 2.077


1st

  • 33/14 teeth main/counter * input = 3.321


Reverse

  • 36/15/15 teeth main/counter/reverse * input = -3.382

Input Ratios

28:23 = 1.217 FS571A (Roadsters and early Z, close spreads)
31:22 = 1.409 (most cars)
32:21 = 1.524 (most trucks and heavy cars. This ratio effects a wider spread)
32:18 = 1.778 (Commercials with widest spread for underpowered vehicles)

Input Shaft

S14 5-speed input shaft

  • O.D.: 1"
  • Spline: 24 teeth
  • Pilot Bushing Inside Diameter: 0.626 to .6300" (Length: .689")
  • Pilot Bushing Outside Diameter: .814 to .815"

Retrieved from "http://datsun1200.com/modules/mediawiki/index.php?title=71-Series_Transmission"

This page has been accessed 9,502 times. This page was last modified 10:52, 20 June 2014. Content is available under Datsun 1200 Club.