About 100K miles ago my differential failed on my 103 engine and I bought used one from a google search. Engine rev's a 75 mph dropped to about 2500
and the ABS works intermittently since then but the economy went to 32 mpg highway at 80 mph. The engine has 425K miles on it now and it seems quite content. The engine is turned on for at least two hours per trip and often for 4.5 hours. I dearly love this car.