The 240SX was built with two primary factory transmissions: a five-speed manual and a four-speed automatic, with the manual being the common choice among drivers for performance and engagement.
Overview of transmission options
Two main drivetrain transmissions were available across the 240SX lineup. The first is a five-speed manual gearbox designed for spirited driving and easy upgrades. The second is a four-speed automatic transmission that provides convenient, no-fuss shifts for everyday driving.
- Five-speed manual transmission: Standard on most S13 and S14 240SXs with KA-series engines; favored by hobbyists for gear control and tuning potential.
- Four-speed automatic transmission: Optional on many trims; smoother for casual driving and easier to operate in heavy traffic.
Many 240SX owners choose the manual for performance builds, but the automatic remains a valid factory option for comfort or resale value.
Generation-by-generation snapshot
Across the two main generations of the 240SX, the transmission choices remained consistent: a five-speed manual and a four-speed automatic. The early S13 (1989–1994) and the later S14 (1994–1998) used KA-series engines with similar two-transmission options.
- S13 (1989–1994): KA24E/KA24DE engines offered with five-speed manual or four-speed automatic; manual was the popular choice for performance and tuning.
- S14 (1994–1998): KA24DE engine offered with five-speed manual or four-speed automatic; transmissions aligned with the same two-option setup as the prior generation.
Check your vehicle's build sheet or the transmission tag to confirm the exact gearbox, which can vary by market and model year.
Identifying your transmission
To determine which transmission is in your 240SX, inspect the transmission's case for a factory stamp or plate near the bell housing, consult the owner's manual, or check the VIN and build sheet. Visual differences: manual gearboxes are clutch-driven units with a clutch pedal; automatics rely on a torque converter and a shift lever with PRNDL positions.
Maintenance considerations
Regardless of the transmission, routine maintenance matters: follow Nissan's guidance for fluid change intervals, use the correct fluid type for manual vs automatic, and avoid overheating. If you plan performance upgrades, many owners upgrade the manual gearbox and clutch to handle higher torque from modified KA24DE engines.
Summary
The 240SX's factory transmissions center on two options: a five-speed manual and a four-speed automatic. Both were offered throughout the S13 and S14 generations, with the manual favored by enthusiasts for performance potential and driving engagement, while the automatic provides ease of use for daily driving. To confirm the exact gearbox on a given car, check the transmission tag, build sheet, or VIN, and maintain the chosen transmission according to Nissan’s guidelines.