I'm not much bigger with 36s.
36 inch tires can be significantly more heavy depending on the width and brand of the tire. There's more than 15 lbs between a 35x12.50 BFG Mud KM2 and the 35x13.5 Toyo MT. Those of us with 35s might be right at the working limit for the stock steering pump. I've never had an issue and I know the rocks in Moab work out the steering.
1989 4Runner: Dual Ultimate (Inchworm front & Marlin 4.70 rear), Marlin Twin Stick, 1200-lb clutch, 4.88 R&P, Aussie Front, Detroit rear, 30-spline Longs, Long hub gears, ARP hub and knuckle studs & 35x12.50 Cooper STT PRO tires. Marlin rear bumper & sliders. FROR front bumper. SAS with Alcan springs & Rancho 9000XL shocks. Budbuilt Bolt-on traction bar. Custom Interior Cage by Those Guys Rod and Customs.
Moab Tested & Rubicon Approved