Jeep Grand Cherokee WJ · 1999–2004

The Second Grand Cherokee.

Solid axles front and rear, Quadra-Coil suspension, and Quadra-Drive on top trims with Vari-Lok progressive lockers in the diffs. 4.0L straight-six or 4.7L PowerTech V8 — the High Output V8 arrived in 2002. The last Grand Cherokee with real trail bones, and the most capable one Jeep ever built without aftermarket help.

1999–2004 Solid front & rear axles 4.0L I6 / 4.7L PowerTech V8 Dana 30 · Dana 35/Chrysler 8.25/Dana 44a

01 / Tools

Built for your rig

4 tools

Stack lift, tires, armor, and recovery. Save, share, and price-check your build.

Coming soonSoon

The reference library. Every DIY procedure for this platform, filtered to your trim, year, and engine.

5+ guidesBrowse

Mileage-driven service schedule for your trim. Oil, diffs, transfer case, and more.

Coming soonSoon

Diagnose the cause in 8 questions. Track-bar, ball joints, tire balance — find it before it finds you.

02 / Learn

Read and watch

Latest · All posts · Workshop · Channels

Latest blog

When to re-gear your axles

The math behind the change — and the feeling that tells you it's time.

All posts

Read the blog

Every post — tools, mod tests, trail reports. Sorted by date, filterable.

Workshop

Shop technique

Torque, seized bolts, brake bleed — the foundations every DIYer needs.

Channels

YouTubers we trust

Honest builders, working trucks. No sponsored fluff, no thumbnail screaming.