Short answer: It’s a 5-speed manual, but the exact gearbox varies by engine and build date.
More detail: In the 2000 TJ Wrangler lineup, the 2.5-liter four-cylinder commonly used the AX-5 five-speed manual. The 4.0-liter inline-six could be paired with either an AX-15 five-speed manual in the earlier TJ period or the NV3550 five-speed manual in later years. Always verify your specific vehicle’s transmission by checking the identification tag on the transmission or the part number stamped on the case.
Engine options and transmission mappings
The manual gearbox installed in a 2000 Wrangler corresponds to the engine in the vehicle. Here are the typical pairings you would encounter for that model year.
- 2.5L I4 — AX-5 5-speed manual
- 4.0L I6 — AX-15 5-speed manual (early TJ models); NV3550 5-speed manual (more common in later 2000s TJ models)
Identifying the exact gearbox helps with parts, maintenance, and upgrades, since the two families use different gear ratios and shift patterns.
How to identify your transmission
Use these steps to confirm which gearbox you have mounted behind your engine.
- Inspect the transmission bellhousing or the side of the case for a model code (for example, AX-15 or NV3550).
- Look for a metal tag or stamped numbers on the transmission casing that indicate the model and sometimes the production date.
- Cross-check the vehicle's original equipment list (from the window sticker or VIN) or consult a service manual for your specific VIN to confirm the factory-installed transmission.
Even with the same engine, production variations can yield different transmissions, so verification is essential for maintenance and parts compatibility.
Transmission code examples
Common identifiers to look for include AX-15 and NV3550, often found on the bellhousing face, near the tail, or on a tag attached to the casing. Having the exact code makes sourcing the correct clutches, bearings, and fluids straightforward.
Summary
The 2000 Jeep Wrangler's manual transmission is a five-speed unit, with the specific model (AX-5, AX-15, or NV3550) tied to the engine and production date. Verify the exact gearbox on your vehicle to ensure proper maintenance and parts compatibility.