91 loyale, 98 forester, 99 impreza, 02 outback, 10 forester
Problem with 02 outback 2.5 shudders under load. Approx 143K. Trans shifts smooth. Plugs/wires replaced, no change. Only happens after car is warm, perhaps 20-30 minutes of driving. Not noticeable at idle or low speed 45mph or less. Suspect u-joint in rear drive shaft. Have placed FWD fuse and will be driving car tomorrow to see if it changes. I have read slightly older outbacks had u-joint problems. Filters(all) not replaced. Orig pcv, egr, maf, 02. Trans/dif fluid, clean and full. Slight oil leak on plug chambers, planning to replace vc gaskets. Vacuum lines/coil no cracks no arcing. Any ideas would be greatly appreciated before i start tearing her apart. I say u-joint because if you let off gas you feel a slight jump almost like slack or momentary reversal of a driveline component. Thanks in advance.