4-Inch Lift Kit with M1 Shocks for 1997–2002 Jeep Wrangler 4WD
- Fits 1997–2002 Jeep Wrangler 4WD — SE, Sport, Sahara, and X submodels
- Kit includes a TJ coil box, two M1 Monotube shock pairs, and a transfer case drop
- Bolt-on install with no cutting or welding — downloadable installation guide available
- Automatic-transmission models may need an SYE and CV driveshaft, plus adjustable lower control arms (SKU 1190)
The Trail Fortress check
Will it fit your truck?
✓ Fits
Automatic transmission models may require a SYE and CV Drive Shaft to fix driveline vibrations adjustable lower control arms SKU: 1190 may also be required in conjunction with the SYE and CV Drive Shaft. Fitment on this page is based on the manufacturer’s application data.
About this kit
4-Inch Lift Kit with M1 Shocks, fitment-checked
Rough Country 90640 is a 4-inch lift kit for the 1997–2002 Jeep Wrangler 4WD in SE, Sport, Sahara, and X trim. The kit pairs coil springs with two sets of M1 Monotube shocks and bolts on without cutting or welding. Automatic-transmission Jeeps may need an SYE and CV driveshaft, and adjustable lower control arms (SKU 1190) alongside them, to settle driveline vibration.
This 4-inch lift kit for the 1997–2002 Jeep Wrangler 4WD ships as a coil-spring package with two M1 Monotube shock pairs, control arms with OEM-style rubber bushings, and a tubular transfer case drop that keeps driveshaft angles in a workable range. Springs are built to factory rates, so ride quality stays close to stock while the front sits level with the rear. Plan for the automatic-transmission caveat before you order, then work from the downloadable Rough Country installation guide. Shipping weight is 131.0 lb.
What’s in the box
Kit contents
- 1× JEEP 97-02 TJ 4WD COIL BOX 1668CT
- 1× M1 MONOTUBE SHOCK PAIR 770743P
- 1× M1 MONOTUBE SHOCK PAIR 770746P
- 1× 4in Kit Box 90630BOX2
Rough Country shares subassemblies across kits, so individual package labels can carry broader application ranges. The complete 90640 kit fits the vehicles shown in the fitment section above.
Specifications
Specs
| Brand | Rough Country |
| Part number | 90640 |
| UPC / GTIN | 00840269918773 |
| Lift height | 4 in |
| Shock package | M1 series |
| Shipping weight | 131 lb |
| Country of origin | US |
| Category | Suspension & Lift Kits › Lift Kits |
| Installation guide | Downloadable PDF |
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