TeraFlex NP231-J 2Low 2WD Low-Range Shift Sector Kit for 1997-2006 Jeep Wrangler TJ & Wrangler Unlimited LJ
- Guaranteed FitmentTeam-confirmed fit or money back
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Fits the same truck
Features
- 2WD low-range option: Rear-wheel drive in low range on the NP231-J.
- Turns tighter: Helps on narrow switchbacks, TeraFlex says.
- Cuts 4WD bind: Eliminates most front-end bind while turning.
- No external upgrades: An internal modification to the transfer case.
- 2H > 4H > N > 4L > 2L: The new shift pattern after install.
- About five hours: TeraFlex's labor estimate for the job.
Description & Fitment
TeraFlex's 2Low kit adds a two-wheel-drive low-range position to the NP231-J transfer case in a 1997-2006 Jeep Wrangler TJ or Wrangler Unlimited LJ. With the rear wheels driving in low range and the front disengaged, the Jeep can turn tighter on narrow switchbacks, and TeraFlex says it eliminates most of the front-end bind you feel turning in 4WD. The change is internal and needs no external upgrades; the new pattern reads 2H, 4H, N, 4L, 2L. TeraFlex lists about five hours of labor.
Fitment & Compatibility
| Years | Model | Bed | Notes |
|---|---|---|---|
| 1997-2006 | Wrangler | TJ/LJ; NP231-J transfer case only |
Check your Jeep: 1997-2006 Wrangler TJ or Wrangler Unlimited LJ with the NP231-J transfer case.
Not for: Other transfer cases; JK and JL Wranglers.
About TeraFlex
TeraFlex describes itself as a Jeep company at heart, started and staffed by people who drive them. It designs, engineers and builds suspension systems, shocks, axles and performance parts, with the Wrangler and Gladiator at the center of the range.
The company traces its roots to the 1950s and MEPCO (Military Equipment Parts Company), an early supplier of Jeep parts. TeraFlex Manufacturing followed in 1996 to build heavy-duty suspension for the TJ Wrangler, and today's catalog runs from full lift systems and the Falcon shock line to axles, steering and armor.
Authorized TeraFlex dealer. Prestige Truck is an authorized TeraFlex dealer, so what we sell is new and genuine TeraFlex. In TeraFlex's words, its limited warranty extends "only to the consumer who originally purchased the product," so keep your receipt with your build records.
Frequently Asked Questions
Which transfer case does it fit?
The NP231-J in 1997-2006 TJ Wrangler and LJ Wrangler Unlimited models, per TeraFlex.
Do I need other parts?
TeraFlex says this internal modification does not require any external upgrades.
How does the shifter work after?
The pattern becomes 2H, 4H, N, 4L, then 2L, with 2WD low as the last position.
How quickly does it ship?
Shipping is free to the lower 48 states, and most orders arrive within 1-5 business days. We email your tracking number as soon as it ships.
Can you confirm it's the right part before I order?
Yes. Send us your VIN or year, model and your transfer case, and we'll check it against TeraFlex's fitment information before it ships.
Do I need to read the instructions first?
Yes. TeraFlex asks you to read its instruction sheet fully before you start, check the parts list against the box, and judge whether you have the experience to do the work yourself.
Installation
- Basic mechanics tool set
- Snap ring pliers
- Mallet or dead blow hammer
- RTV gasket maker
- Red thread locking compound
- Rest on TeraFlex's tool list
Here's the short version. Follow TeraFlex's install sheet (below) for your Jeep's exact steps and torque values.
- Drain the transfer case oil, remove the rear driveline, disconnect the front driveline at the transfer case yoke and tie it aside, and pull the speedometer gear assembly (13mm bolt); the kit can be fitted with the case in the Jeep or on the bench.
- Remove the front output yoke, the rear dust shield and harmonic balancer (if fitted), the rear output seal and snap ring, the five tail housing bolts and tail housing, and the indicator switch if fitted; split the case (eight case-half bolts; note the 10mm 12-point bolt; pry at the machined notches) and lift out the outputs with the chain.
- Remove the range lever, washer and nut, the mode fork with shift rail and mode ring (note the ring's orientation), the range fork with range hub, the shift detent screw, spring and poppet, and the factory shift sector; check the fork shift pads for wear.
- Fit the new shift sector in place of the factory one with the original O-ring and bushing, put the provided pads in the new range fork and install it with its pin in the sector groove, refit the mode fork, shift rail and mode ring, then the range lever, washer and lock nut (20-25 ft-lbs), the indicator switch (15-25 ft-lbs) and the detent screw, spring and poppet (12-18 ft-lbs).
- Clean and refit the magnet, mode fork spring and oil pickup, join the case halves with a max 3/16" bead of gasket maker and blue-thread-locked bolts torqued crisscross to 20-25 ft-lbs, fit the snap ring, speedometer gear and retaining snap ring, the tail housing with a max 3/16" bead (bolts crisscross 15-20 ft-lbs), and both yoke nuts with red thread locker at 90-130 ft-lbs.
- Tighten the sensor bolt to 8-12 ft-lbs, fill with 2.2 pints (1.0L) of ATF+4 and reinstall the case if it was removed, adjust the shift linkage at the trunnion in 2H, and test-drive to confirm every position of the new shift pattern (2H, 4H, N, 4L, 2L).
Stuck on a step?
Specifications
| Brand | TeraFlex |
|---|---|
| Part Number | 2204000 |
| Product Type | Transfer case shift sector kit |
| Transfer Case | NP231-J |
| Shift Pattern | 2H > 4H > N > 4L > 2L |
| Modification | Internal; no external upgrades required |
| UPC | 843885027607 |
Warranty, shipping & returns
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Warranty
TeraFlex's warranty list gives its transfer case 2WD low range kits 1 year against defects in materials and workmanship. Paint and powder coat finishes carry 90 days (defects only).- TeraFlex extends its limited warranty only to the consumer who first bought the product, and only on the vehicle the part was first installed on. It does not pass to a later owner.
- Coverage starts on the purchase date and does not restart if a part is repaired or replaced.
- For a covered defect, TeraFlex will either repair or replace the product (or the faulty part) free of charge or refund the purchase price, at its discretion, and it pays the freight to send a repaired or replacement part back to you.
- Not covered: damage from transportation, storage, improper use, skipped instructions or preventive maintenance, modifications, unauthorized repair, normal wear and tear, product finish, improper installation or maintenance, racing or competition, or accidents, abuse and neglect. Improper installation, poor maintenance, racing or competition use, and neglect or abuse void the warranty.
- Paint and powder coat finishes carry 90 days of defect coverage only, not wear from use.
- Claims: contact us first. Keep your proof of purchase or original invoice; removing the part from the vehicle and the inbound shipping are the owner's responsibility.
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Free shipping
Ships free to the lower 48 states, with no minimum order.- Order by 5 PM ET on a business day and it starts processing the same day.
- Most orders arrive within 1-5 business days.
- We email your tracking number as soon as it ships.
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Inspect on delivery
Open the box as soon as it arrives. Match every part to the TeraFlex parts list on the instruction sheet, check machined parts for shipping damage, and contact us right away about anything missing or damaged. Check it as soon as it arrives.- Look for crushed ends, punctures or tears in the carton.
- If something looks wrong, take photos of the box and the parts (and if a driver asks you to sign, note the damage on the receipt).
- Open the box and check the parts against the parts list before you install.
- Email support@prestigetruck.com right away with your order number, a short note and photos. We send a replacement or a full refund at no cost to you.
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30-day returns
Return it within 30 days of delivery, unused, in the original packaging, with proof of purchase.- Email support@prestigetruck.com with your order number. We reply within 1-2 business days with instructions.
- Damaged, defective or wrong item: we send a prepaid label or arrange a pickup.
- Changed your mind: you pay return shipping. No restocking fee.
- Refunds go back to your original payment method within 7 business days of approval. See our returns policy.