56

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Gearbox Swaps
 Types: 56 | 60 | 63 | 71 | 90 | R30 
 Transmission Swaps
 Identification
 5-Speeds | F5C56A | Stumpy
 6-speed
 Toyota 5-speed
 Manual/Auto conversion
 more: Transmission Modifications



The 56-series is the stock Datsun 1200 transmission. It was fitted to all RWD B-series Datsuns with A12 and A13 engines. Standard models used 3-speed 56s, while most models used 4-speed versions. The Datsun 1200 GX-5 used a 5-speed version. It was designed to handle the torque of an A12 or A13, but for A14 and A15 engines a 60-Series Transmission is recommended. All of the 3 speed, 4 speed & 5 speed 56 & 56A RWD gearboxes were the same overall length. There were also FWD versions of the 56 gearbox. These are manufactured by Aichi Machine.


Also see: 5-Speeds for an all A-series 5-speeds





Gearbox Numbering

Nissan coding for gearbox models. Example of F4W56L:


  • F: Floor shift
  • R: remote shift (column shift)
  • S: overdrive
  • 4: forward speeds (3, 4 and 5 were available)
  • C: competition type synchros
  • 56: distance in mm between mainshaft and countershaft (with larger distance implying a larger, stronger transmission). Nissan models included 60-Series Transmission and 63-Series Transmission and the 71- used in the bigger Nissans.
  • L: Long extension housing


Album 22959


A, B, or C is the evolutionary series for the box as they get older. Some boxes have an L suffix for long extension housing versions. Direct drive boxes have a "direct drive" suffix after the box numbers.


The Nissan chassis code (not transmission code) has F = Five-Speed, and T = 4-speed , e.g. B110GFK was GX Five-Speed. And B110GTK was GX Four-speed. The T holds true for export models as well. The full body codes aren't on the underhood plate, but you'll see some of the extended codes on the cover of the owners manual.


The close ratio 'option' boxes were normally available only as a separate purchase from the Datsun Competition department [through various outlets], so it did not come as a 'factory' option in B110 & B210 models, however I believe that some dealers in Japan were either fitting 'option 1' five speeds, or buying the conversion parts & upgrading the F5W56A gearboxes in new GX5's during pre-delivery for 'special' customers.


Discussion: POST GEARBOX NUMBERING AND BASIC INFO.


56-series is marginal with an A14 (the 56A works OK), but definitely is not strong enough for A14 turbo:

Album 7039



3-Speed

Standard trim (STD) Datsun 1200 models came standard with an R3W56 transmission. This was a remote-shift box with a steering-column mounted shifter.


Main: Three Speed Transmission




4-Speed

The stock sport transmission is fine for city driving. It has wide-spaced gears to allow a steep 1st for easy takeways.


Mainshaft PNs for F4W56 transmissions: * 32241-H1010 SHAFT-MAIN B110 F4W56L up to 03/73 * 32241-G1101 SHAFT-MAIN B110 F4W56A from 04/73 * 32241-G1101 SHAFT-MAIN B210 F4W56A * 32241-G1101 SHAFT-MAIN B310 F4W56A


{| class="wikitable" data-border="1"
Description 1st 2nd 3rd 4th Rev
Stock F4W56L 3.757 2.169 1.404 1.000 3.640
Option #1 (M/C) 2.862 1.908 1.350 1.000 3.640
Option #2 (U/C) 2.168 1.592 1.231 1.000 3.640

|

|}


Reference: 1984 Nissan Competition Catalog


Number of teeth on gears: * Counter gear shaft: 29T, 25T, 19T, 13T * 29T (input), 25T (3rd), 19T (2nd), 13T (1st) * + 13T (rev) * Mainshaft: 19T, 23T, 27T, 31T * 19T (input), 23T (3rd), 27T (2nd), 32T (1st), 31T (rev) * Reverse idler: 17T


Ratio Computation: * Input gears: 29/19 = 1.526 * Rev: 29/19 * 17/13 * 31/17 (idler) = 3.640 * 1st: 29/19 * 32/13 = 3.757 * 2nd: 29/19 * 27/19 = 2.169 * 3rd: 29/19 * 23/25 = 1.404 * 4th: 1:1 (direct drive, input shaft linked to output shaft, all output gear pair spin free)



Option 1 Middle-Close Ratio

The option #1 (middle-close) gear set alleviates the 2nd-into-3rd RPM drop that exists with the stock 4-speed. It can only be installed into 1200 transmissions (F4W56L) built up to 3/73.


PART NO. DESCRIPTION * 32210-27720 OPT #1 CLUSTER GEAR 16T/20T/26T/29T * 32230-27720 OPT #1 1ST GEAR 30T * 32250-27720 OPT #1 2ND GEAR 25T * 32260-27720 OPT #1 3RD GEAR 23T


Reference: 1984 Nissan Competition Catalog



Option 2 Ultra-Close Ratio

The option #2 (ultra-close) gear set has excellent ratios for racing. The gearset can only be installed into 1200 transmissions (F4W56L) built up to 3/73.


* 32210-H1020 OPT #2 CLUSTER GEAR 19T/23T/26T/29T * 32230-H1020 OPT #2 1ST GEAR 27T * 32250-H1020 OPT #1 2ND GEAR 24T * 32260-H1020 OPT #1 3RD GEAR 21T


Reference: 1984 Nissan Competition Catalog


4-Speed Gear Ratios (GEAR-COUNTER)


Model Note Gearset Counter PN teeth
F4W56L to 0373 stock 32210-24900 29T,25T,19T,13T
F4W56L to 0373 middle-close 32210-27720 29T,26T,20T,16T
F4W56L to 0373 ultra-close 32210-H1020 29T,26T,23T,19T
F4W56A 0473-0874 stock 32210-G1100 29T,25T,19T,13T


F4W56L: All interchange with appropriate matching gears for mainshaft


Gears early stock late stock teeth m/c teeth u/c teeth
1st 32230-24900 32230-G1100 32T 32230-27720 30T 32230-H1020 27T
2nd 32250-24900 32250-G1100 27T 32250-27720 25T 32250-H1020 24T
3rd 32260-24900 32260-G1100 23T 32260-27720 23T 32260-H1020 21T


F4W56A: USA B110, starting April 1973. Used through 1982 (listed for A12-powered B210 & B310)


Album 19051



Assembly

Post 493574 Post 493574



Inspection

File:TM-08 TM-25.jpg



B10 4-speed

1966-1970 Datsun 1000


Also See: datsun100.com transmission☁


RHD uses a bellcrank release lever with mechanical linkage, early 56-series

Album 25020 Album 25021


LHD uses a bellcrank release lever, operated by a hydraulic clutch Slave Cylinder

Album 29529 Album 29530 Album 29531 Album 29532

stamped 'Z U 5 15090'?

Album 29533



Revisions


Identification

Look for "56" in large letters on the right side of the case



Also look for the distinctive "ribbing" around the circumference of the front case. Other Nissan transmission are more smooth.


"56" location



This is in various places on the right side of the case. It may be a production variation. All the 56L three speed & four speed gearboxes shared the same gearbox case with integral bellhousing. All the four speed & five speed 56A gearboxes shared the same gearbox case with integral bellhousing. The three speed appears to have been discontinued with the introduction of the 56A series.



Early 56A

The 56A versions are just a model revision, with slight changes. It debuted with the Datsun 1200 Truck (B120) (FEB 1971) with the revised stronger transmission (per the parts catalog). It was then fitted to B210s at introduction (1973) and at the same time export B110s (from April of 1973) were supplied with the 56A.


NOTE: There was an 'L' revision of the 4-speed, but never any 'L' 5-speeds.

4-speeds * 1966: 56-series intro * Jan 1970: B110 uses 56L transmission * Feb 1971: B120 Truck uses 56A revisions * Apr 1973: B210 production begins in Japan * Apr 1973: 56A supplied for export B110 * Mar 1975?: Stronger 56A with increase webbing


B210 * new unit Engine Plate instead of Dust Cover * new plate requires different length Release Bearing


Note that the 4-speed transmission was redesigned for the 56A revision. Gearsets are not interchangable between early and late transmissions.




Modifications have been made on the following points to strengthen the gears and bearings, and to improve lubrication performance as well as noise and vibration proof at high-speed driving.



  1. Strengthened gears and bearings: Although there is no change in the gear ratio, each gear has an increased width by 0.039 to 0.079 (1 to 2 mm) and the countershaft, front bearing and main shaft bearing are strengthened.
  1. Improved lubrication performance: To ensure proper lubrication in the rear extension bushing, an oil dam is installed in the center of the extension.



Reference: Service Bulletin Vol. 188 "Introduction of New Model Datsun B210 Series" page 69, July 1973, Nissan Motor Co., Ltd. Tokyo Japan Telex: NISMO.

Album 22967



Late Model 56A

  • Strong Ribbing
  • 56A and Nissan symbols in separate boxes


Stronger webs on the ribbing

Album 19055 Album 19056



1990s

1990-1994 Sunny Truck has a unique case Extension housing w/dual mount flanges

Album 23176 Album 23177 Album 23178



5-Speed

See: 5-speeds for an overview of 5-speeds in general




For the stock B110 5-speed (GX5 gearbox), see: 5C56



Tail Housing

Late (heavy duty) tail housing has a bumpy knob on top where it meets the case.

Album 21403


One or two motor mount bosses?

Album 21402

Early or late can come both ways. Why?


All 8910-up have both. The last one is for an exhaust pipe bracket. Some earliers one have both, however.


One switch or two? 8910- has both

Album 21404



Clutch Lever Type

  • Remote (side) linkage: 3-speed
  • Bell crank linkage: Datsun B10 (Datsun 1000) Album 15856
  • Hydraulic linkage: LHD models, hole on left side of case
  • Cable linkage: RHD models, cable hole on right side of bell flange Album 19050



Clutch Cable Hole

RHD 4-speeed and 5-speed models use a clutch cable. In the B110, this was a small hole in the bellhousing flange, while it is a larger hole in B210 and B310 models.


Album 21401


5-speed: B110 small hole, B210 large hole

Album 19047


1976-1994 'Angular-D' shape

Album 26658


Gearbox Mount Position


  • Early boxes have a single gearbox mount location
  • Late boxes have two locations


Drain Plug vs. Reverse Switch


  • 4-speed (RHD early models 67-73): Reverse Switch points straight back
  • 4-speed (later model 1975-up): drain plug points straight back
  • 5-speed: drain plug points down, from middle of adapter plate


Extension Housing Shape On the Five Speed, the extension housing is a gravity casting (sand casting) which is fatter than the four speed extension, as both reverse and first gear are located in there.

Album 14706


The bolts holding the extension to the front case are:


  • Short in 4-speed
  • Long in 5-speed


Album 4777


Both first & reverse are in the extention housing which looks to be a gravity casting, while the main case is a pressure die casting.


  • Sandwich plate differs - in the 5-speed, the oil drain plug screws up into this from the bottom.
  • Tail Housing (extension) - 5-speed extension bulkier to encase 1st gear (as well as reverse).
  • Like the four speed, the reverse light switch is also rearward facing in the five speed 56A gearbox.



Electrical Switches

All 56-series transmissions have a Reverse Lamp Switch.


Pink arrow REV switch: left 4-speed, right 5-speed

Album 19048


Some newer 4-speeds include one or more of the following, for the purpose of controlling emission gear on the engine:


* Top Switch (high gear detect switch) * Neutral Switch * Reverse Lamp Switch


Reverse Switch is on bottom | 4-speed Neutral Switch is near top

Album 19052



Gears


5-speed Ratios

The 5-speed transmission (F5C56A) was originally installed on certain non-USA models of the 1200. With the stock gearing this transmission works very well for street, slaloms, high-speed time trials or rallies. With the optional gearing (32010-H7220N), it is the best production-based transmission available for racing versions of the 1200, B210 or 210 Datsuns. The synchro mechanism is the servo-type (steel).


  • 32010-H7251 stock GX-5 5-SPD TRANSMISSION
  • 32010-H7251P OPT #1 W/R 5-SPD TRANSMISSION
  • 32010-H7220N OPT #2 C/R 5-SPD TRANSMISSION


Part No. 1st 2nd 3rd 4th 5th Rev
32010-H7251P W/R 3.757 2.374 1.659 1.291 1.000 4.040
32010-H7220N C/R 2.676 1.691 1.398 1.181 1.000 2.877


Reference: 1984 Nissan Competition Catalog


[[1984_Nissan_Competition_Catalog#Flywheel.2C_Clutch_and_Transmission|]]catalog


The counter gear is a single machined piece that includes several gears on one shaft.



5-speed Gear Ratios (GEAR-COUNTER)


{| class="wikitable" data-border="1" data-cellspacing="0"
Model Note Gearset Counter PN teeth
F5C56A wide-ratio stock GX-5 32213-H7200 29T,26T,23T,18T,13T
F5C56A close-ratio Close-ratio 32213-H7220 25T,23T,21T,18T,13T

|

|}


Counter gears interchange if the matching gears are used:


{| class="wikitable" data-border="1" data-cellspacing="0"
Gears wide-ratio teeth close-ratio teeth
Main 32200-H7200 19T 32202-H7220 23T
1st 32230-H7200 32T <- same
2nd 32250-H7200 28T <- same
3rd 32260-H7200 25T 32262-H7220 27T
4th 32270-H7200 22T 32262-H7220 25T

|

|}


Stock (W/R) gearset

Album 26281


C/R gearset

Album 26282


Close/Ratio Gearset (uses existing Gear 1 and Gear 2)

Album 26280


Straight-cut gear version of C/R gearset (uses stock helical cut Gear 1)

Album 26277



4-speed Ratios

{| class="wikitable" data-border="1" data-cellpadding="2" data-cellspacing="0"
Part No. 1st 2nd 3rd 4th Rev.
Stock 4-speed 3.757 2.169 1.404 1.000 3.640
OPT 1 M/C 2.862 1.908 1.350 1.000 3.640
OPT 2 U/C 2.168 1.593 1.233 1.000 3.640

|

|}


Datsun 1200 4-speed. Same as B20 Datsun 1000 Pick-up 1st 3.76 2nd 2.17 3rd 1.40 4th 1.00 REV 3.46


4-speed Ratios (GEAR-COUNTER) for F4W56L only (will not fit F4W56A)


{| class="wikitable" data-border="1" data-cellspacing="0"
Model Note Gearset Counter PN teeth
F4W56L Stock W/R 32210-24900 13T,19T,25T,29T
F4W56L OPT 1 M/C 32210-27720 16T,20T,26T,29T
F4W56L OPT 2 U/C 32210-H1020 19T,23T,26T,29T

|

|}


Counter gears interchange if the matching gears are used:


{| class="wikitable" data-border="1" data-cellspacing="0"
Gear Stock OPT 1 OPT 2
1st 32230-24900 32T 32230-27720 30T 32230-H1020 27T
2nd 32250-24900 27T 32250-27720 25T 32250-H1020 24T
3rd 32260-24900 23T 32260-27720 23T 32260-H1020 21T

|

|}


All sets use the same 19T main gear (input shaft)


Stock 4-speed gearset Explanation

Album 13278


Middle-Close 4-speed gearset

Album 26279


Ultra-Close 4-speed gearset

Album 26278


Topgear POST straight-cut gearset

Album 8444 Album 8445


Topgear 56A gearset 1st 2.50 2nd 1.64 3rd 1.25 4th 1.00



Ute

Sunny truck Long Body vs Short Body uses different transmission. Front case differs slightly, while gears, shifter, and rear extension do not differ.


SB * 32010-G1650 -8910 * 32005-21101 SWITCH ASSY-REVERSE LAMP * 32010-95W00 8910- [has neutral switch] * 32006-G6200 NEUTRAL POSITION SWITCH * Uses a full engine plate 30411-H5001 * 30501-H5000 SLEEVE-CLUTCH RELEASE * 11322-G1000 MEMBER ASSY-ENGINE MOUNTING, REAR -8503 * 11322-G1900 MEMBER ASSY-ENGINE MOUNTING, REAR 8504-


LB * 32010-G1651 -8910 * 32005-H5000 SWITCH ASSY-REVERSE LAMP * 32010-95W03 8910- [has neutral switch] * 32006-G6200 NEUTRAL POSITION SWITCH * Uses dust cover 30422-H5010 * 30501-H1000 SLEEVE-CLUTCH RELEASE * 11322-H1002 MEMBER ASSY-ENGINE MOUNTING, REAR -8503 * 11322-G1910 MEMBER ASSY-ENGINE MOUNTING, REAR 8504-



Smooth Case

Rare smooth-case 56A with no ribs. The casting itself is different. What did it come out of?


Album 19710 Album 19711 Album 19712 Album 19713


Another one:

Album 29528


And a smooth-case 5-speed

Album 26069 Album 26068 Album 26067



Parts

See also: 56-Series Transmission Parts


 


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