For both my 4 Runners I installed Tekonsha Brake Controller. No issues towing 1500 lb Trillium Trailer. Easy install. Works great esp those long hills,
Previously we towed our Trillium without brake control. The weight was under 1500 lbs so it was more like towing a uhaul trailer. Always shifted. Did not use Drive.
I installed Tekonsha brake control to tow travel trailer (3000lbs) works great, easy to install. Safer than relying on the truck's brakes even at this low weight.