🔧 Modifications Would you buy a heavily modified fifth-gen SR5 for overlanding and towing?
Hey everyone, I am the Jeep Rubicon guy looking to move into the Toyota 4Runner world and would like your opinions on a build I am looking at. I have already learned a bunch from following this group and would love to have some real quality feedback on a used 4Runner and pricing.
Here is the jist of the listing and answers form the owner.
Would you buy a heavily modified fifth-gen SR5 for overlanding and towing?
I’m considering a 2019 4Runner SR5 4WD with roughly 85,000–90,000 miles and an asking price in the low $40,000s. I’m coming from a modified Wrangler Rubicon and looking for something suited to longer overlanding trips while towing a loaded camping Turtleback trailer weighing approximately 3,300 pounds.
I’m familiar with modified Jeeps but still learning the 4Runner platform. I’d appreciate honest feedback on the setup, potential maintenance concerns, and value.
The major modifications include:
- Aftermarket 2.5-inch adjustable front suspension with upgraded upper and lower control arms
- Adjustable rear links and panhard bar, plus panhard geometry correction
- Upgraded bump stops
- Upgraded steering rack, tie rods, and reinforced spindles
- Approximately 35-inch mud-terrain tires on aftermarket wheels
- 4.88 gears and an aftermarket selectable rear electronic locker
- Factory CV shafts with upgraded high-angle boots
- Front differential needle-bearing elimination modification
- Extended differential breathers
- Auxiliary transmission cooler with an electric fan
- Aftermarket brakes and stainless brake lines
- Engine tune requiring premium fuel
- Aluminum front bumper, auxiliary lighting, and accessory switch panel
- Solar charging and a separate lithium auxiliary battery
The seller reports one-owner history, a clean title, regular maintenance, and limited recreational off-road use. Those are seller claims that I would want to verify with records and an independent inspection. There is still a loan on the vehicle.
According to the seller, the gearing was installed about a year ago. The spark plugs were replaced before tuning, and a coolant service may be due. The seller says the tune can be changed back to stock or to a regular-fuel calibration.
It has a receiver and trailer wiring but no brake controller. The seller reports towing a roughly 4,000-pound camper and says the gearing and additional transmission cooling helped. I understand that modifications don’t increase the factory tow rating, and I would want to check actual payload, axle weights, and tongue weight.
My questions:
- How well do 4.88 gears and approximately 35-inch tires work for highway travel, mountain driving, and towing a 3,300-pound trailer?
- Are there particular concerns with the upgraded steering rack, custom tie rods, reinforced spindles, or suspension geometry? What would you have a Toyota specialist inspect?
- For remote travel, would you prefer a build like this or a more lightly modified TRD Off-Road? Does the aftermarket rear locker make the SR5 a reasonable starting point?
- What should I verify about the regear and locker installation, including records, break-in service, noise, and operation?
- Would you return it to the factory tune for this use? Any concerns about its history of running a premium-fuel tune?
- With this amount of equipment, how concerned should I be about remaining payload once trailer tongue weight, two adults, dogs, and camping gear are included?
- Does the low-$40,000 asking range make sense, or would you put that money toward a newer or lower-mileage example with fewer modifications?
I like the idea of buying something already equipped, but I want to understand the compromises and avoid paying heavily for modifications that may add maintenance or reduce its usefulness for my trips. What would make you buy it, negotiate harder, or walk away?
