Revision as of 02:28, 22 March 2009

The 63a transmission is a large strong transmission. It was adapted by Nissan to fill a marketing need in USA for a 5-speed (to compete with the Corolla SR-5) and so the existing 63a was modified to fit the small A-series engine. This has two special significances:

It is strong, suitable for overbored, supercharged or turbocharged A-series engines
Its successor, the 60-Series Transmission 5-speed is much lighter and so a better fit for A14 and A15 naturally aspirated engines. The 60 is also smaller than 63 and so a better fit in Datsun 1200s.

The 63A came in two versions:

63A to fit L-series engine
63A to fit A-series engine

So check the bellhousing bolt pattern.

1 Overview
2 Source
3 Clutch
- 3.1 63-Series 5-speed Swap Notes
  - 3.1.1 Tunnel Mounts Removal
- 3.2 Gear Ratios
4 Part Numbers
- 4.1 Gearset

Overview

For an overview of 5-speeds in 
general, see: 5-Speeds. 
Comparos, Ratio info, etc.

Datsun boxes are numbered by the distance between the centres of the countershaft and the main shaft. The 63-series has 63 mm between the shaft centres.

The "A" indicates the transmission revision, not the engine type it fits. ? my casting has a 63A#1 cast were there different versions?

Dogleg 5 speed overdrive 5th Slave cylinder is on the left side Uses AT prop shaft

Source

The 63-series 5-speed for Nissan A Engine came in 1976-1/2 to 1978 Datsun B210 with A14 engine. USA and Japan markets had such cars.

Clutch

63-series take the L-series type input shaft, but small-diameter (standard diameter) A-series size clutch disk.

http://www.rockauto.com/catalog/x,carcode,1210813,parttype,1996,partGroup,15

Specifications:

180mm Diameter (7-1/8") -- same as smaller transmissions (it fits the standard A12 or A14 flywheels)
24 Splines [56-series and 60-series use 18 splines]

63-Series 5-speed Swap Notes

It's easy to get the 63 in if your 1200 was originally an automatic with a wider transmission tunnel. Use the auto tranny mount and make an adapter plate that will move the mounts to the right spot.

For manual 1200, remove the factory mounting bosses from the tunnel, and fabricate new ones:

63a crossmember
Note that the factory crossmember mounting brackets have been removed from inside the tunnel. This crossmember bolts to the floor.

Get a Datsun 810 speedometer cable, it's about 150 mm longer.

You'll need a prop shaft from an AT equipped 60 series tranny as it uses the same output shaft.

63a

Tunnel Mounts Removal

Discussion: Tunnel mount removal?

The rear engine mount (gearbox mount) brackets are spot-welded on. Don't drill them right out. There is a special spot weld removal drill bit. Go to Mitre 10 or a decent Hardware they will have them. Grab a wire wheel or coarse sand paper sand around the mounts so you expose the spot welds a bit better and then carefully drill with the bit it will leave little lumps and you can file or coarse sand them down smooth. The last thing i would want is more holes in the body and floor -- they are thin enough already.

The only problem is that the spot weld drill bit insanely high-priced.

Gear Ratios

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Gear	F5C56A GX5	F5C56A Opt. 1	F5C56A Opt.2	Overdrive 5	Overdrive 5	FS5W60A A14	FS5W60A A15	FS5W63A A14
1st	3.757	3.757	2.676	3.513	3.513	3.513	3.513	3.382
2nd	2.374	2.374	1.691	2.17	2.17	2.17	2.17	2.013
3rd	1.659	1.659	1.398	1.378	1.378	1.378	1.32	1.312
4th	1.254	1.291	1.181	1	1	1	1	1
5th	1	1	1	0.875	0.825	0.821	0.821	0.854
Rev	4.04	4.04	2.877	3.764	3.764	3.764	3.764	3.57
Note	Stock B110 & B210 GX-5	wide ratio PN 32010-H7251P	close ratio PN 32010-H7220N	?	?	1980 NA shop manual	1980 NA Shop manual	1978 NA Shop manual