Jeep Wrangler Parts, Specs and Maintenance Guide

The Jeep Wrangler is the last mainstream solid-axle, body-on-frame off-roader sold new in the US, and that hardware choice defines its maintenance story: a Dana front/rear axle, transfer case, and (on Rubicon) locking differentials mean fluid checks most crossovers don't have. 6L Pentastar V6 on 0W-20, and its most-reported issues are the Pentastar's plastic oil-cooler/filter-housing cracking and 'death wobble,' a violent steering shake from worn track-bar/tie-rod/steering-damper components rather than a factory defect. 4L 'Rubicon 392' V8 (2021+), and the 4xe plug-in hybrid (2021+).

Early JLs drew an NHTSA investigation into frame-weld quality tied to steering shimmy, a 2018–2020 manual-transmission clutch recall, and (on 4xe only) a high-voltage battery fire recall. Across both generations, tire size is trim-dependent, Rubicon ships on 33-inch mud-terrains from the factory, and the Xtreme Recon package puts genuine 35s under a Rubicon or 392 with no lift required, and off-road use accelerates wear on track bars, ball joints, and diff/transfer-case fluid compared with a Wrangler that never leaves pavement.