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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 F5C56 is a 5-speed transmission used in the 1972 Datsun 1200 GX5, and also in 1973-1975 A12-powered Datsun B210s. All version are marked '56A' on the side of the case although the factory parts catalog C-260 says 'F5C56'.
Contents |
Dogleg Shifter
The 56-series five speed is a Dogleg shifter:Why a dogleg pattern? In racing, 1st isn't used much, but the 2-3 shift needs to be quick.
2- 4 1- 3- 5 dogleg
NOTE that 60L and 63A A-series 5-speeds are also doglegs, but are overdrive transmissions. F5C56 is the only non-overdrive type.
Overview
The 56-series transmission came factory stock in Datsun 1200 GX-5 models and in B210 JDM. They were also sold by Datsun Competition. This means they are very rare and hence expensive.
The B210 version 5-speed (for A12T) used an engine plate instead of a simple dust cover. See Engine Plate
The advantages of the 56 over other 5-speeds is:
- It is non-overdrive, and hence desirable for certain types of racing
- It is a dogleg shifter (as is the 63A and 60L for A-series engine) for quicker 2nd-3rd shifts
- It is lighter, aiding acceleration
- It is smaller, fitting perfectly into the tunnel
- It bolts into any Datsun 1200 using factory parts. The other 5-speeds need slight modifications
These boxes don't have a great reputation for strength behind the A14 or A15 motors, but are excellent behind an A12. They are marginally OK for use with A13, although the TS racers had to treat them with great care. NOTE they do fit the smaller tunnels in the Datsun 1000.
The 'standard' Datsun 1200 competition engine used a 76mm bore yeilding 1270cc This is the standard [short stroke] A13 dimension & capacity. Serious competition engines ran even larger bores with capacities only a few cc's under 1300. The Option 1 five speed was the recomended transmission behind these factory spec race engines. Source. Datsun B110 Competition Tune Up Manual, 1974
The #Gearbox Crossmember is slightly different from the 4-speed crossmember.
Reverse gear is the only moveable gear in a 56-series gearbox -- it slides back and forth to engage or disengage.
Rear-pointing Reverse Switch is a tell-tale sign of the F5C56
clutch hole: B210 angular | B110 Reverse-shape
B110 small hole, B210 large hole
4-speed vs 5-speed
Look for '56A' on the right side of the box. This IDs 56-series 4-speed or 5-speed
The most sure-fire IDs for the 5-speed:
- The top case bolts are long (2-3" long)
- Reverse gear detent plug in on left side
- Reverse light switch on top, pointing straight back
- Drain plug straight down
5-speeds are RHD only (clutch hole on right-side, and right-side cutout for clutch lever). 4-speeds are available RHD or LHD.
Right side: 4-speed vs 5-speed (pink arrows point to Reverse Switch)
Blue arrows point to shifter interlock bolts, which are on different sides (4-speed vs 5-speed).
Left side: 5-speed vs 4-speed (notice length of bolts marked in yellow)
Question: isn't it the best way to know if it is a 5-speed is to mover the shifter knob into the "fifth gear" position?
Answer: This has mislead many a buyer. Many a 4-speed appears to shift into a 5th position but there's nothing there... One method to determine if a 56A gearbox is a five speed is to move the lever to the left. If a spring detent is felt, then press against it, overcoming its resistance, & move the lever forward. Turn the input shaft by hand & the output shaft should rotate in the opposite direction. If it does, then it's a 5 speed.
56 5-speed swap Notes
Spacers
To fit the 56-series 5-speed,the 4-speed FS4W56 Gearbox Crossmember can be used with 20 mm spacers between the body mount and the crossmember.
POST b310gx: I always used the standard transmission mount, maybe with a few spacer washers to lower it off the floor. Hope this helps you out.
Buy from Pitroad http://www.pitroad-ts.com/A-parts-2/bushing/mission-m110.htm
B110 4-speed crossmember converted for F5C56A usage
B310 Sunny 56-series 4-speed crossmember with spacers for F5C56A usage (for use in B310)
ミッション メンバー
Factory Crossmember
1984 Nissan Competition Catalog:
When installing the F5C56A 5-speed transmission in the 1200, B210 or 210 models an alternate transmission mount, insulator and stopper must be obtained. The 210 mount requires 20mm/.787" spacers for correct driveline alignment.
* 11322-H7201 1200 TRANSMISSION MOUNT
* 11322-H5700 B210 TRANSMISSION MOUNT
* 11341-H8500 210 [B310] TRANSMISSION MOUNT (requires 20mm spacers)
* 11321-H1000 INSULATOR
* 11323-H7200 STOPPER
56 Rear Engine Mount (Transmission Mount)
Mount: (1) two bolts (2) two bolts
Drain Plug
The original drain plug for the GX-5 gearbox was a taper-thread plug as expected, but with a hex-head instead of the more common square-headed plug.
Because it goes in the adapter plate, if tightened "normally" the adapter will crack (hence why it is called the fragile "glass transmission").
08931-44210 PLUG-drain 5 speed
breakdown per (NES) 08 Nissan Engineering Section 931 Plug, threaded, hex head taper thread 44 14mm threads 21 unspecified 10 surface not processed
Gear Ratios
Parts
B210 Version
1973-1975 B210 with twin carbs and 5-speed (B210GFK) was the only model to use the F5C56 gearbox. It was available in Coupe or Sedan.
Differences from B110 gearbox
C-260 B210 part catalog 1976-11 (all other parts are same as B110 -- see Transmission_Case_Part_Numbers)
TRANSMISSION (5 speed, F5C56) 32010-H5250 TRANSMISSION ASS'Y (17/5) 32010-H5252 * TRANSMISSION ASS'Y (17/5) (from '73-10) > 32010-H5250 32010-H5251 TRANSMISSION ASS'Y (18/5) (ラヅアル タイヤ？？ radial tyre) 32010-H5253 * TRANSMISSION ASS'Y (18/5) ( ) > 32010-H5251
TRANSMISSION CASE (5 speed) 32100-H5035 CASE COMP.-transmission 32100-H5030 * CASE COMP.-transmission (from '75-3) > 32100-H5035 00933-11400 PLUG-welch T/M case (2) [not listed: *32150-H5000 RETAINER-oil] 38322-H7200 BREATHER ASS'Y 32703-H1000 PINION ASS'Y-speedometer (18T) (ラヅアル タイヤ 付？ radial tyre) 30501-H5000 SLEEVE-bearing clutch release
TBC TRANSMISSION CONTROL (5 speed, F5C56) 32816-H5200 ROD-fork, reverse & 1st (from '73-10) <set 1> 32816-H7200 32813-H5200 BRACKET-rod fork 2nd & 3rd (from '73-10) <set 2> 32813-H7200 Set 1 とセットで？？？ 32850-H5200 32813-H5200 32865-N5102 or 32865-N5103 Set 2 32850-H5200 32816-H5200 32865-N5102 or 32865-N5103
Shifter
Shift lever, bushings, etc. are the same B110 vs. B210. However B210 had an additional leather-like knob option.
B110 5-speed 32865-H7200 KNOB-control lever
B210 F5C56 32865-H7200 KNOB-control lever (木木目 wood grain) 32865-N5103 KNOB-control lever (木木目 wood grain) (from '73-10) <x> 32865-H7200 32865-H5700 KNOB-control lever (皮？？) 32865-N5102 KNOB-control lever (皮？？) (from '73-10) <x> 32865-H5700