Model Applications
Three Subaru Model variations fitted with Transmission Type TY856WB8JA as standard, or available as a factory fitted option.
| TY856WB8JA | GDB | G | JP | Impreza WRX STi spec.C 17″ tyre | 280 PS | May | '06 | – | Apr. | '07 |
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| TY856WB8JA | GDB | G | JP | Impreza WRX STi spec.C 16″ tyre | 280 PS | Jun. | '06 | – | Apr. | '07 |
| TY856WB8JA | GDB | G | JP | Impreza WRX STi spec.C type RA-R | 320 PS | Oct. | '06 | – | Feb. | '07 |
Plot GraphTransmission Specification
6-Speed Manual Transmission (6MT), fitted new to production cars from May 2006 to April 2007.
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 | 1. | 062 | :1 |
| Sixth Gear Ratio | 0. | 842 | :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 | Helical Limited Slip |
| 38410AA100 |
| 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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| 205/ | 55 | R16 | 8.40 km/h(5.22 mph) | 12.86 km/h(7.99 mph) | 17.34 km/h(10.78 mph) | 22.69 km/h(14.10 mph) | 28.76 km/h(17.87 mph) | 36.27 km/h(22.54 mph) | … | −8.62 km/h(−5.35 mph) |
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| 235/ | 45 | R17 | 8.55 km/h(5.31 mph) | 13.09 km/h(8.13 mph) | 17.66 km/h(10.97 mph) | 23.10 km/h(14.35 mph) | 29.28 km/h(18.19 mph) | 36.93 km/h(22.95 mph) | … | −8.77 km/h(−5.45 mph) |
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| 235/ | 40 | R18 | 8.58 km/h(5.33 mph) | 13.13 km/h(8.16 mph) | 17.71 km/h(11.00 mph) | 23.17 km/h(14.40 mph) | 29.36 km/h(18.25 mph) | 37.04 km/h(23.01 mph) | … | −8.80 km/h(−5.47 mph) |
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‡ The Tyre Sizes shown are the various OEM sizes for Subarus fitted with Transmission Type TY856WB8JA. For other tyre sizes, or for vehicle speeds at different engine speeds, see the Vehicle Speed Calculator and Graph page.
Transmissions with Matching Ratios
| TY856UB1KA | Driver Control Centre Differential (DCCD) | Helical Front LSD |
| TY856UB6AA | Driver Control Centre Differential (DCCD) | Helical Front LSD |
| TY856UB9AA | Driver Control Centre Differential (DCCD) | Helical Front LSD |
| TY856WB7JA | Driver Control Centre Differential (DCCD) | Helical Front LSD |
| TY856WB7KA | Driver Control Centre Differential (DCCD) | Helical Front LSD |
| TY856WB8KA | Driver Control Centre Differential (DCCD) | Helical Front LSD |
| TY856WB8KD | Driver Control Centre Differential (DCCD) | Helical Front LSD |