All Datsun 1200s were fitted with a 3-speed, 4-speed or 5-speed 56-Series_Transmission. Other transmissions that will fit the Datsun 1200's engine include the 60-Series Transmission and the 63-Series 5-speed transmission.
- B10 (Datsun 1000): 56-series
- B110 (Datsun 1200): 56-series
- B210 A12 engine: 56-series
- B210 A14 engine 4-speed: 60-series
- B210 A14 engine 5-speed: 63-series
- B310 Datsun Sunny (210)
- A12 engine: 56-series
- A14/A15 engine: 60-series
Rear-wheel drive A-series engine bellhousing pattern:
The 56-series transmissions are identified by their small size and extensive ribbing. The 60-series transmissions are a little bit bigger but have a smooth case. Finally, the 63-series transmissions are much bigger units.
56 "ribbed case" vs. 60 "smooth case"
Smooth case: 63 'big boy' vs. 60
Toyota vs 63 "big boy" vs. 60 "smooth case"
Toyota "cast iron case" vs 56 "ribbed case"
After determining the series, see the following pages to identify 4-speeds from 5-speeds: