Gear Ratios for 33/35/37 on JK/JL/Gladiator (Highway & Crawl)
Gear Ratios for 33/35/37 on JK/JL/Gladiator (Highway & Crawl)
Why re-gear? Bigger tyres make factory ratios too tall. Re-gearing restores RPM, torque, transmission temps, and crawl control.
| Tyre | Recommended Ratio | Notes |
|---|
| 33” | JK: 4.10 | JL/JT: 4.56 | Touring balance |
| 35” | 4.56 or 4.88 | Autos prefer 4.88 |
| 37” | 4.88 or 5.13 | Towing: 5.13 |
- Autos like one step lower (numerically higher).
- If top gear is useless on highway, your gearing is too tall.
- Re-gear protects driveline and improves fuel economy under load.
Post your engine, trans, tyre size, current ratio and use case for tailored advice.
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