Model Applications
Two Subaru Model variations fitted with Transmission Type TY856WN4KA as standard, or available as a factory fitted option.
| TY856WN4KA | GDB | D | GB | Impreza WRX STi WR1 | 320 PS | Nov. | '03 | – | Dec. | '03 |
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| TY856WN4KA | GDB | D | GB | Impreza WRX STi type-UK DCCD | 265 PS | Nov. | '03 | – | Mar. | '04 |
Plot GraphTransmission Specification
6-Speed Manual Transmission (6MT), fitted new to production cars from November 2003 to March 2004.
Main Transmission
| First Gear Ratio | 3. | 636 | :1 |
| Second Gear Ratio | 2. | 375 | :1 |
| Third Gear Ratio | 1. | 761 | :1 |
| Forth Gear Ratio | 1. | 346 | :1 |
| Fifth Gear Ratio | 0. | 971 | :1 |
| Sixth Gear Ratio | 0. | 756 | :1 |
| Seventh Gear Ratio | … |
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| Reverse Gear Ratio | 3. | 545 | :1 |
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| High Range Ratio | … |
| Low Range Ratio | … |
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Drive System
Full-time four wheel drive with Driver Control Centre Differential (DCCD)
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| Rear Drive Transfer Ratio | 1.100:1 |
Front Differential
| Type | Suretrac Limited Slip |
| 38410AA060 |
| Ring Gear Teeth | 39 |
| Pinion Gear Teeth | 10 |
| Final Drive Ratio | 3.900:1 |
Vehicle Speed at 1,000 rpm
| Tyre Size‡ | First | Second | Third | Forth | Fifth | Sixth | Seventh | Reverse |
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| 225/ | 45 | R17 | 8.43 km/h(5.24 mph) | 12.91 km/h(8.02 mph) | 17.41 km/h(10.82 mph) | 22.78 km/h(14.15 mph) | 31.57 km/h(19.62 mph) | 40.55 km/h(25.20 mph) | … | −8.65 km/h(−5.37 mph) |
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| 225/ | 40 | R18 | 8.47 km/h(5.26 mph) | 12.97 km/h(8.06 mph) | 17.49 km/h(10.87 mph) | 22.88 km/h(14.22 mph) | 31.72 km/h(19.71 mph) | 40.74 km/h(25.31 mph) | … | −8.69 km/h(−5.40 mph) |
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‡ The Tyre Sizes shown are the various OEM sizes for Subarus fitted with Transmission Type TY856WN4KA. For other tyre sizes, or for vehicle speeds at different engine speeds, see the Vehicle Speed Calculator and Graph page.
Transmissions with Matching Ratios
| TY856WN2CA | Viscous Limited-Slip Centre Differential (VCD) | Suretrac Front LSD |
| TY856WN3CA | Viscous Limited-Slip Centre Differential (VCD) | Suretrac Front LSD |
| TY856WN4CA | Viscous Limited-Slip Centre Differential (VCD) | Suretrac Front LSD |
| TY856WN4FA | Viscous Limited-Slip Centre Differential (VCD) | Suretrac Front LSD |
| TY856WN4MA | Driver Control Centre Differential (DCCD) | Suretrac Front LSD |
| TY856WN6CA | Viscous Limited-Slip Centre Differential (VCD) | Suretrac Front LSD |
| TY856WN6FA | Viscous Limited-Slip Centre Differential (VCD) | Helical Front LSD |
| TY856WN6KA | Driver Control Centre Differential (DCCD) | Helical Front LSD |
| TY856WN6MA | Driver Control Centre Differential (DCCD) | Helical Front LSD |
| TY856WPDAD | Viscous Limited-Slip Centre Differential (VCD) | Open Front Differential |
| TY856WPEBB | Viscous Limited-Slip Centre Differential (VCD) | Open Front Differential |
| TY856WVBAA | Viscous Limited-Slip Centre Differential (VCD) | Open Front Differential |
| TY856WVCAA | Viscous Limited-Slip Centre Differential (VCD) | Open Front Differential |