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The F5C56 is a 5-speed transmission used in the Datsun 1200 GX5, and early Datsun A12-powered B210s.
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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 dimention & 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 56-series five speed is a Dogleg shifter:
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NOTE that 60L and 63A A-series 5-speeds are also doglegs, but are overdrive transmissions.
The Gearbox Crossmember is slightly different from the 4-speed crossmember.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. |
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
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 (right-side clutch hold, 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.
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 converted 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
Gear Ratios
See Main Article: 56-Series_Transmission#5-speed_Ratios
Parts
See Main Article: 56-Series_Transmission_Parts#F5C56