I flushed and filled the coolant, drained and filled the power steering fluid, changed the front diff fluid out and used Redline Heavy ShockProof gear oil, and switched out the front two skid plate bolts (front two plates, not front two bolts) to grade 10.9 after bending some of the 8.8 ones that were in there. And the gear oil and drain plug magnet looked really good, so the locker is doing really well in there! Updated maintenance list is below.
•185,000 miles: Rear brakes done.
•185,000 miles: Rear axle seals done.
•190,000 miles: CV boots swapped out to silicone ones.
•195,000 miles: Spark plugs changed.
•195,000 miles: Cluth, pressure plate, throwout bearing and slave cylinder hose replace.
•195,000 miles: Rear crankshaft seal replaced.
•205,000 miles: Front brake pads and rotors replaced.
•210,000 miles: Engine belts replaced.
•210,000 miles: Current KM2s were installed.
•212,000 miles: Right rear wheel bearing replaced.
•214,000 miles: Timing belt changed.
•214,000 miles: Front O2 replaced with factory Toyota sensor, rear cat replaced with Magnaflow cat.
•214,500 miles: I bought the 4runner.
•214,500 miles: LBJs replaced, along with new bolts. OEM everything.
•215,100 miles: Fluid change. Front and rear differentials and transfer case changed with Redline 75w90 synthetic. Transmission changed with Redline MT-90 synthetic. Engine oil: Castrol 10w30 High Mileage w/ OEM Toyota filter.
•215,500 miles: Uniballs replaced, UCA bushings replaced.
•216,330 miles: Plugs, wires, air filter, pcv valve and grommet, and fuel filter replaced, all with OEM parts except for the wires which were NGK. Tires rotated. MAF cleaned. Coilovers recharged and lower heim joints replaced.
•216,600 miles: Rear lift installed with LC 8 wraps and ext. Bilstein 5100s.
•216,600 miles: Driver side axle seal replaced with OEM seal.
•218,145 miles: Front transfer case output shaft oil seal replaced. OEM seal, Redline 75w-90 NS gear oil.
•219,020 miles: Oil change with Castrol high mileage 5w-30, Mobil 1 filter.
•219,020 miles: Steering rack replaced with O'Reilly's reman'd unit with lifetime warranty.
•219,020 miles: Aussie locker installed in front diff.
•219,458 miles: Rear upper and lower control arms replaced.
•219,721 miles: Coolant flushed and filled
•219,721 miles: Power steering drained and filled
•219,721 miles: Front diff drained and filled with Redline Heavy ShockProof