6-speed

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6-speed transmission gives you two (count 'em 2) overdrive gears. Or some have a close ratio direct-5th with overdrive, which is better for performance. 6-speeds can be modified to fit Datsun 1200. Just cut the bellhousing and weld on a fragment of A-series bell housing, then machine the input shaft smaller.

S15 6-speed

The 1999-2002 Nissan Silvia S15 Strawberry with SR20DE/SR20DET had an optional close-ratio 5-speed + overdrive (6 forward speeds total). In AUS, the six-speed was in the S15 Spec-R model.

S15 modified; A-series bell grafted on

• FS6R92A 92-Series Transmission
• only 16kg heavier than a standard 1200 4spd
• 1st: 3.630
• 2nd: 2.200
• 3rd: 1.543
• 4th: 1.210
• 5th: 1.000
• 6th: 0.767

Pilot Bushing

S15 5-speed FS6R92A

• 32202-B9500 BUSHING-CRANKSHAFT
• used on L, Z, VG, VQ, SR, KA, and CD engines (same as 71C bushing)
• Pilot Bushing Inside Diameter: 0.626 to .6300" (Length: .689")
• Pilot Bushing Outside Diameter: .814 to .815"

Since this is much larger in diamter than the A-series, machining is needed.

A-series crankshaft bore is for a bushing with 0.671" O.D., length .723"

• The FS6R92A input shaft end can be turned down to ~.671 O.D.
• Could the A-series crank pilot hole be bored out to .814" so the 71-Series bush can be fitted?

Clutch Disc

FS6R92A clutch disc [all 240mm]

• 30100-85F00 9901-0011
• 30100-85F14 0011-

Is it the same splines as the S14 240SX 5-speed?

• O.D.: 1"
• Spline: 24 teeth

There is an A-series clutch disc that is 1" x 24T: 30100-K0500.

Input Shaft Length

How far does the FS6R92A input shaft extend past the transmission face?