Toyota FJ80 FJ100 3.1:1 HF2A Transfer Case Gear Set

Upgrade your factory low-range gearing with the Sumo 3.12:1 Gear Set—engineered for HF2A and HF2AV transfer cases found in 1990–1997 Toyota Land Cruisers and Lexus LX450 models. Designed to increase low-end torque and control dramatically, this gear set is a must-have for rock crawlers, overlanders, or anyone looking to tackle serious terrain with authority.

This gear set replaces your stock low-range transfer case gears, increasing the ratio from 2.488:1 to 3.12:1—offering more control, torque, and confidence in technical environments. Your high-range remains unchanged for daily driving or highway cruising.

Factory gearing wasn’t built for today’s 37s and 40s—or the trails you’re aiming to conquer. This Sumo gear set:

• Improves torque multiplication for climbing and crawling
• Delivers better throttle control in steep descents and loaded conditions
• Enables slower, more precise movement off-road
• Fits directly into your factory HF2A/HF2AV case with minor output gear clearance grinding required

Kit Includes: 

• (1) Idler Gear – 22 teeth
• (1) Low Gear – 58 teeth

Fitment:

• Toyota Land Cruiser
  • FJ80 (1990–1992)
  • HDJ80, HZJ80, FZJ80 (JDM & EU markets)
  • FJ100, 105 Series (select export markets)
• Lexus LX450
  • FZJ80 (1995–1997 US)
• Mega Cruiser
  • BXD20 (Japan & global markets, 1996–2001)

Note: Minor grinding required for output gear clearance.