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Jeep Gladiator JT Regear Chart (2020-2026)
Factory transmissions, transfer cases and axle ratios for the Jeep Gladiator JT — with the two tables every regear decision runs on: cruise RPM at 70 mph and crawl ratio, for every ratio you can actually buy. All data verified against manufacturer specs (sources at the bottom of the page).
Factory presets
| Trim / preset | Transmission | Transfer case | Axle | Factory tire | Crawl | RPM @ 70 |
|---|---|---|---|---|---|---|
| Sport | 850RE 8-speed automatic | Command-Trac part-time | 3.73 | 245/75R17 (31.5 in) | 47.8:1 | 1,867 |
| Overland | 850RE 8-speed automatic | Command-Trac part-time | 3.73 | 255/70R18 (32.1 in) | 47.8:1 | 1,832 |
| Rubicon | 850RE 8-speed automatic | Rock-Trac part-time (Rubicon) | 4.10 | LT285/70R17 (32.8 in) | 77.2:1 | 1,971 |
| Mojave | 850RE 8-speed automatic | Command-Trac part-time | 4.10 | LT285/70R17 (32.8 in) | 52.5:1 | 1,971 |
| EcoDiesel | 8HP75 8-speed automatic (EcoDiesel) | Command-Trac part-time | 3.73 | 245/75R17 (31.5 in) | 47.8:1 | 1,867 |
Crawl and RPM computed from the factory ratios listed — load any preset into My Garage and the calculators use it everywhere.
Cruise RPM at 70 mph — 850RE 8-speed automatic, top gear 0.67
| Tire | 3.73 | 4.10 | 4.56 | 4.88 | 5.13 | 5.38 |
|---|---|---|---|---|---|---|
| 32 in | 1,838 | 2,020 | 2,246 | 2,404 | 2,527 | 2,650 |
| 33 in | 1,782 | 1,959 | 2,178 | 2,331 | 2,451 | 2,570 |
| 35 in | 1,680 | 1,847 | 2,054 | 2,198 | 2,311 | 2,423 |
| 37 in | 1,589 | 1,747 | 1,943 | 2,079 | 2,186 | 2,292 |
Crawl ratio — first gear 4.71, by transfer case and axle
| Transfer case | 3.73 | 4.10 | 4.56 | 4.88 | 5.13 | 5.38 |
|---|---|---|---|---|---|---|
| Command-Trac part-time (2.72:1) | 47.8 | 52.5 | 58.4 | 62.5 | 65.7 | 68.9 |
| Rock-Trac part-time (Rubicon) (4.00:1) | 70.3 | 77.2 | 85.9 | 91.9 | 96.6 | 101.4 |
| Selec-Trac full-time (optional) (2.72:1) | 47.8 | 52.5 | 58.4 | 62.5 | 65.7 | 68.9 |
Factory-published crawl ratios
- Rubicon, 6-speed manual, 4.10: 84.13:1 published — reproduces from the ratios in this page's database (84.13:1 computed)
- Rubicon, 850RE automatic, 4.10: 77.20:1 published — reproduces from the ratios in this page's database (77.20:1 computed)
Axles under this platform
- Dana 44 (M210) Carrier break: 3.92 (3.73 & down use one carrier; 3.92 & up the other — confirmed by Yukon carrier listings). Non-Rubicon TJ rear is 30-spline; Rubicon TJ is 32-spline rear with air/electric locker variants by year. Practical ratios 4.56-5.13 for 35-37s.
- Dana 44 (M220) Carrier break: 3.92 (3.73 & down use one carrier; 3.92 & up the other — confirmed by Yukon carrier listings). Non-Rubicon TJ rear is 30-spline; Rubicon TJ is 32-spline rear with air/electric locker variants by year. Practical ratios 4.56-5.13 for 35-37s.
- Dana 44 (M210) wide Carrier break: 3.92 (3.73 & down use one carrier; 3.92 & up the other — confirmed by Yukon carrier listings). Non-Rubicon TJ rear is 30-spline; Rubicon TJ is 32-spline rear with air/electric locker variants by year. Practical ratios 4.56-5.13 for 35-37s.
- Dana 44 (M220) wide Carrier break: 3.92 (3.73 & down use one carrier; 3.92 & up the other — confirmed by Yukon carrier listings). Non-Rubicon TJ rear is 30-spline; Rubicon TJ is 32-spline rear with air/electric locker variants by year. Practical ratios 4.56-5.13 for 35-37s.
Every JT ships with Dana 44 M210/M220 axles, so JT regears do not face the JL Sport Dana 35 ceiling. Practical aftermarket ceiling 5.38.
Deciding? Run your exact combo in the regear comparison, then let the $39 Decision System turn it into a parts list, a budget and a shop-ready build sheet.
Sources
- Stellantis Jeep Gladiator specification sheets (shared JL/JT transmission and transfer-case specs)
- Jeep Gladiator factory trim/axle listings