Overview
The RE2100 is a 1.0-inch transfer case lowering kit for the Jeep Wrangler YJ, TJ and LJ. It works with the YJ or TJ crossmember and helps reduce driveline vibration on vehicles that do not run a rear CV driveshaft.
The title names all three Wrangler chassis, and the years for each are listed in the vehicle fitment section below.
Key features
- 1.0-inch drop, per the title
- Intended to reduce driveline vibration on vehicles not running a rear CV driveshaft
- Direct fit type
Driveline angles and drops
Lowering the transfer case moves its output shaft down, which changes the angle of the driveshafts that connect it to the axles. Steep angles wear U-joints quickly and can cause vibration, while mismatched angles between the front and rear shafts are a common cause of shudder at speed. A lowering kit is one way to adjust those angles, but the result depends on the rest of the driveline.
Before installing, check the transfer case mounts, crossmember clearance and the brake lines routed nearby. Measure the driveline angles after the kit is in place, and adjust the shaft lengths or angles if the numbers fall outside the range your vehicle needs. Inspect U-joints and the slip yoke for wear, since they show the first signs of trouble after a drop.
- Measure driveline angles before and after
- Check crossmember and mount clearance
- Inspect U-joints and yokes for wear
Specifications
| Brand | Rubicon Express |
|---|---|
| Part number | RE2100 |
| UPC | 614901440058 |
| Drop | 1.0 inch |
| Crossmember | YJ or TJ |
| Fitment type | Direct fit |
Vehicle fitment
Based on the product title, this lowering kit is for the Jeep Wrangler YJ from 1987 to 1995, the Wrangler TJ from 1997 to 2006 and the Wrangler LJ from 2004 to 2006.
The Wrangler JK, JL and later generations are not covered by these chassis codes.
Confirm your vehicle’s year, model and trim before ordering.
Installation notes
Dropping the transfer case changes the driveline angles, so measure them after the kit is in place.
What’s included
It is a 1.0-inch lowering kit. Check the package contents against your installation before starting.
