Stumpy

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A stumpy transmission is 26.3 inches overall length -- the same length as a Datsun 1200 transmission. The classic 'stumpy' is the 71C tranmission from a Skyline, although there is a 63-series version commonly called a 'shorty'. These are the right length for a 1200, and the shifter comes up in the stock location, though obviously they are much larger around. There are 4-speed and 5-Speeds in this length.

63-Series

See: 63-Series Transmission

• FS5C63A: Mid-close ratio for Z-series engines
• FS5W63A: Wide ratio for L-series and A-series engines

The 5-speed is commonly called the 'dogleg' box because it has a dogleg shift pattern. However, this is not a great nickname as some other Datsun transmissions have a doglog shift pattern like the 56A 5-speed which is the same length.

NOTE: 63-series 5-speeds came in both short and long lengths. Measure to be sure which one you are getting. The long version is 31.5 inches long.

63-series 4-speeds can be identified by the removable pan on the bottom of the gearbox.

63-series 5-speeds appeared starting 1976-1/2.

A-series Engine

• 1976-1978 HB210 (A14 powered B210) FS5W63A

L-series Engine

• 1977-1979 Datsun S10 (Silvia/200SX) 5-speed
• 1978-1979 Datsun A10 (Stanza/Violet/510) 4-speed
• 1978-1979 Datsun A10 (Stanza/Violet/510) OPTION 5-speed
• 1968-1973 Datsun 510 4-speed F4W63
• 1977-1978 Datsun 610 5-speed
• 1972-1973 Datsun 620 USA (early with L16 engine) F4W63
• Datsun 710 4-speed F4W63
• Datsun 521 with L16 engine has a shorty F4W63, but with flanged output shaft

Z-series Engine

• 1980-1981 Datsun A10 (Stanza/Violet/510) 4-speed
• 1980-1981 Datsun A10 (Stanza/Violet/510) 5-speed

Other

• J-series and R-series engines used F4W63, length unknown. Bell pattern differs from L-series.

F4W63L (1976-1985)

• 1978-up 510
• Bolted on bottom pan but smooth main gear case instead of the previous ribbed design

A14 FS5W63A comparo L20B FS5W63A

Z20 5-speed

S10 L20B 5-speeed (wide ratio)
1st 3.382
2nd 2.013
3rd 1.3121
4th 1.000
5th 0.854 

S110 Z20S engine (mid-close ratio)
1st 3.170
2nd 1.921
3rd 1.312
4th 1.000
5th 0.854

Do not confuse the shorty with a long-tail 63-series 5-speed:

71-Series

71-Series Transmission

• Skyline DR30 (FJ20 engine with 71C)
• Datsun 720 pickup USA (71B)

Interchangeability

63-series 5-speed transmission parts swap to other 63-series 5-speeds.

• 4-speed to 5-speed: Complete unit swaps. Parts do not.
• L-series to A-series to Z-series. Front case (including bell housing) swaps

71 to 71 front cases interchange.