Understanding your Suzuki Jimny JB74’s gear ratios is essential for anyone planning final-drive calculations, speedometer correction or aftermarket swaps. Below you’ll find all the stock transmission, transfer-case and differential ratios for both manual and automatic models.
Suzuki Jimny Gen4 (JB74) Stock Gear Ratios
| Component | Manual (5-spd) | Automatic (4-spd) |
|---|---|---|
| 1st Gear | 4.425︓1 | 2.875︓1 |
| 2nd Gear | 2.304︓1 | 1.568︓1 |
| 3rd Gear | 1.674︓1 | 1.000︓1 |
| 4th Gear | 1.190︓1 | 0.696︓1 |
| 5th Gear | 1.000︓1 | N/A |
| Transfer Case – High | 1.000︓1 | 1.320︓1 |
| Transfer Case – Low | 2.002︓1 | 2.643︓1 |
| Final Drive (Diff Ratio) | 4.090︓1 | 4.300︓1 |
Why These Ratios Matter
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Final-drive planning: Combine transmission, transfer-case and diff ratios to calculate your true wheel torque and speed.
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Speedometer accuracy: Knowing the exact high-range ratio helps you correct for non-OEM tyre sizes.
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Aftermarket swaps: Use these figures to compare stock gearing against SJ low-range cases, diff upgrades (e.g. 17/87 kits) or portal-axle setups.