1) BMW M 系列 七速雙離合器自動變速箱 (GS7D36SG) Getrag 製造, 擁有兩組Borg-Warner 濕式離合片組clutch packs. 1, 3, 5, 7 以及後退檔銜接於一組時, 2,4,6檔可以以第二組銜接. 兩組皆可於8ms (百分之一秒)完成預銜接的程序. 依官方數據有效對應 最高轉速9000轉, 最大扭力值為520nm(應該相當保守) 來應付E9X M3的420nm 應該很安全.
2) GS7D36SG 變速箱內齒比如下:
1st: 4.780
2nd: 2.933
3rd: 2.153
4th: 1.678
5th: 1.390
6th: 1.203
7th: 1.000
Reverse: 4.454
2) GS7D36SG 變速箱基本上使用約8 公升由德國 Pentosin 公司所生產的特製 75 weight變速箱油 (一公升市價約1500上下).
3) 若是包含整個系統, 變速箱,高壓油管,幫浦, 以及油冷系統, 約可含9.5 公升的油 (貴森森阿).
4)德國 Pentosin 公司所生產針對此款變速箱的型號是: BMW-DCTF-1
5) BMW 原廠料號如下:
BMW 83 22 2 148 578 : DCTF-1 1-Liter bottle
BMW 83 22 0 440 214 : DCTF-1 1-Liter bottle
BMW 83 22 2 148 579: DCTF-1 20-Liter jug (20 公升裝 國外未稅為含運售價約台幣 15000, 感覺便宜多了)
BMW 83 22 2 147 477: DCTF-1 20-Liter jug (20 公升裝)
6) 德國 Pentosin 公司所生產針對此款DCT變速箱油也有市售品, 型號是: BMW-DCTF-1Pentosin FFL-4.
基本上這油有多神 來聽聽 Pentosin 化學工程師的說法
"We vex the FFL-4 for 192 hours at 170°C (338°F) by bringing in air. It is still okay after this treatment. But this is an aerobic treatment whereas in the gear box the FFL-4 sees an unaerobic atmosphere most of the time. If you take an hour of this lab test and estimate that, it is equivalent with an hour of the car running at 200 km/h (124 mph) you get a milage of 38400 km (23861 miles). But obviously one hour at 170°C under air stands for more than 1 hour at 200 km/h. According to BMW it is 5 hours at 200 km/h."
理論上變速箱系統是在沒有空氣的情況下運作的, Pentosin 以更嚴苛的實驗將空氣導入(加速氧化)並將油連續加熱 192小時 170°C (338°F) 來模擬車子以時速200公里連續跑38400公里的情況.....反正就是說很穩定就是啦.
原廠設定為永久性用油無須更換, 我倒是認為可以已一定的里程或是年限(例如三年五萬公里)來作更換
1公升以及20公升裝比較圖(圖片來源 M3forum.net)
Pentosin FFL-4 (FFL4) is a special fully synthetic transmission fluid, which has been exclusively developed for the application in the new double clutch transmission (DCT) designed by GETRAG. This transmission is a highly developed, complex high tech aggregate which puts extremely demanding requirements onto the transmission fluid.
Pentosin FFL-4 has been completely newly developed to satisfy the high demand and was adjusted together with GETRAG to comply with the various challenging specific DCT–performance requirements. In order to ensure perfect DCT-operation it should therefore by all means be avoided that Pentosin FFL-4 is being mixed with any other transmission fluid during service.
Approvals
- BMW EU: 83 22 2 148 578
- 83 22 2 148 579
- BMW USA: 83 22 0 440 214
- 83 22 2 147 477
Classification
- The product is not classified as dangerous.
| Unit |
Result | Method | |
| Appearance | bright and clear | DIN 10964 | |
| Density at 15 °C | kg/m³ | 842 | DIN EN ISO 12185 |
| Kinematic Viscosity at 100 °C | mm²/s | 7,0 | DIN EN ISO 3104 |
| Kinematic Viscosity at 40 °C | mm²/s | 34,7 | DIN EN ISO 3104 |
| Viscosity Index | 168 | DIN ISO 2909 | |
| Dynamic Viscosity at -40 °C | mPa*s | 7400 | ASTM D2983 |
| Flash Point COC | °C | 220 | DIN EN ISO 2592 |
| Pour Point | °C | -54 | ISO 3016 |
| Evaporation Loss 1h at 200 °C | mass % | 3 | DIN 51 581-1 |
| Taper Roller Bearing Test, shear loss (192 h) | % | 6,5 | CEC-L-45-A-99 |
| Taper Roller Bearing Test, Viscosity after Shear (192 h) |
mm²/s | 6,8 | CEC-L-45-A-99 |
| FZG Wear Test A/16.6/90 // A/16.6/120 | Failure Load Stage | >12 // >12 | DIN 51354-2 |
| FZG Pitting PT (C/9/90) average out of 3 tests |
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