2nd Gen 4Runner Towing Capacity: Real Numbers and Real Limits
Straight answer: a V6 2nd gen 4Runner (1990–1995) is rated to tow about 3,500 pounds, and a 22RE four-cylinder truck is realistically a 2,000–2,500-pound tow vehicle at most. Those are the numbers — but on a 30-year-old truck, the rating is only half the story.
What Each Engine Can Honestly Handle
The 3.0L V6's 150 hp and 180 lb-ft will move 3,500 pounds, but it will work for it — expect downshifts on grades and patient merging. A small boat, a pair of ATVs, a utility trailer with a project engine: comfortable. A loaded tandem-axle car hauler: that's the ceiling, and it will feel like it. The 22RE is a wonderful engine that simply doesn't have the torque for serious towing; keep it to light utility trailers and it will thank you. On either engine, a 5-speed manual gives you more control on grades than the 4-speed automatic.
The Age Tax: What Matters More Than the Rating
A rating written in 1992 assumed a healthy 1992 truck. Before towing anything meaningful today, three systems need to be genuinely fresh, not just functional. Cooling: towing is sustained load, sustained load is heat, and heat is what kills the 3.0L — a marginal radiator that survives commuting will not survive a July grade with a trailer. Transmission: if it's the automatic, fresh fluid is mandatory and a supplemental cooler is the single best towing upgrade you can make. Brakes: your truck's brakes are stopping the trailer too; anything over about 1,500 pounds should have its own trailer brakes.
Towing Setup Checklist
Use a Class II/III hitch properly bolted to the frame, keep tongue weight around 10–15% of trailer weight, air the rear tires toward max sidewall pressure, and watch the temp gauge like it owes you money. If you tow regularly, the complete 3" lift kit's refreshed rear suspension also cures the saggy-tail squat that 30-year-old factory springs give you with a loaded hitch.
Bottom Line
Respect the 3,500-pound V6 rating, halve your expectations with the 22RE, and spend your money on cooling, transmission service, and brakes before you spend it on the trailer. A sorted 2nd gen tows its rating for decades; a neglected one grenades a head gasket on the first mountain pass.
