PRE-RELEASE
Gear ratios
| Gear ratios |
| Overall ratio |
| Z19DTH | Z19DTR | B284 | |
| Differential | 2.67 | 3.20 | 3.20 |
| 1st gear | 11.06 | 13.27 | 13.27 |
| 2nd gear | 6.32 | 7.59 | 7.59 |
| 3rd gear | 4.15 | 4.98 | 4.98 |
| 4th gear | 3.08 | 3.69 | 3.69 |
| 5th gear | 2.29 | 2.75 | 2.75 |
| 6th gear | 1.83 | 2.19 | 2.19 |
| Reverse gear | 9.05 | 10.86 | 10.86 |
