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[Datsun 1200 encyclopedia]


From Datsun 1200 Club

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Categories: Transmission | Nissan Engines

All A-series engines use the same Engine Bell-pattern. This means any rwd transmission, from B10 to B310, fits any A-series engine. No other Nissan engine shares this pattern. This means transmissions from Datsun 1600 or any other will not fit an A-series engine. Note that the only A-series RWD transmission to use an actual bellhousing is the automatic, all the manuals have the bellhousing built into the front half of the transmission case.



A-series automatic used a bellhousing

See main article: Automatic#Bellhousing


A-series manual transmission did not use a bellhousing, instead the front case of the transmission bolted directly to the engine
19059.jpgAlbum click to view

B110 used a dust cover to cover the lower portion

B210 used a rear engine plate (instead of dust cover)
13659.jpgAlbum click to view 22846.jpgAlbum click to view

Engine-to-transmission flange dimension
315 mm: distance between top and bottom bolts
300 mm: bolt circle diameter (11.8 inch)
100 mm: distance between bottom bolts
106 mm: distance between top bolts, offset 5mm from centerline
Starter at 3:30 looking at rear of engine
       (at 8:30 looking at transmission)

25422.jpgAlbum click to view


E1 (1200) and J-series have the same block bolt pattern. However, both engines use an intermediate transmission plate, so the transmission pattern may differ.

J-series and R-series engines both used F4W63, length unknown. Bell pattern differs from L-series. Are J and R compatible?


L-series bells are the same six-cylinder to four-cylinder

L-series will interchange with Z-series, but L has considerably more slant. Best to use the correct one.

KA has no slant
13640.jpgAlbum click to view

A-series has starter at about 8:00 O'Clock position
L-series has starter at about 9:00 O'Clock position
22340.jpgAlbum click to view


E-series and GA-series bell patterns interchange. It is similar to the A-series and will bolt to an A12, but some of the bolts do NOT line up.


These are all identical.

NOTE: L-series is same but slanted. 


CA16 uses a smaller clutch & gearbox. 
CA18 & CA20 use a factory adapter plate & larger transmission

SR is reportedly compatible with some minor differences.

GA is compatible with the CA bell (less adpater)




The SD engine bell is the same as all the R, H and U-series engine (R16, H16, U20). They share the same block.


The housing pattern of the QR25DE engine is available from this image.

25755.pngAlbum click to view

This was taken off an 06 Sentra SE-R Spec V trans, using a DRO and axial indicator on a vertical mill.

Hole diameters were taken with dial calipers.

This pattern is for reference only, and it is strongly advised that the measurements be verified before any use.


RB lines up with some, but not all KA bolts. The top 3 bolts are in a different location. RB20 bellhousing on a KA block, the dowels line right up, and only 2 bolt holes need to be modified, one of them is extremely close.

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