There are several options for CV axles (front):

CVJ sells inner high angle boots to replace all the inner boot issues with a longer, silicone boot. Highly recommended.

There are several options for rear axle upgrades:

Toyota/Lexus:

  • Stock 8“ rear with improved ring and pinion.
  • Stock 8” rear with improved ring and pinion and axles.
  • 2010 or later FJ 8.2“ rear axle replacement (whole housing and diff) - Bolt on without KDSS
  • 2010 or later 4Runner 8.2” rear axle replacement (whole housing and diff) - Bolt on with or without KDSS, depending on 4Runner trim (Trail Premium w/KDSS will bolt on to a GX470 w/KDSS)
  • 2010 or later GX460 8.2“ rear axle replacement (whole housing and diff), will only fit KDSS GX470's or will require rear sway bar removal or bracket fabrication. Swapping to a GX460 rear axle will also require re-gearing to match factory 3.73, or regearing the front to match 3.91 (doable by replacing the front diff with a ~$100 junkyard GX460 unit)
  • Aftermarket 8.2” rear axle replacement (whole housing and diff) - Bolt on
  • Aftermarket 9.5“ rear axle replacement (whole housing and diff) - Bolt on

Non-Toyota/Lexus

  • Aftermarket Currie axle replacement (whole housing and diff) - Modifications needed to driveshaft.