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1040834 Steve, I had this problem with my 89 4.0 and the crank sensor definitely fixed it. I would be sure that this has been done properly. Also, next time it happens, try unplugging it and plugging it back in. Then see if it starts. With mine, this would often allow it to fire up and run...

1040840 Thanks for your help. I have considered the electric fan route already, but have been afraid to act on it. My mechanical fan is 18" diameter with 3" of depth (pitch) which is a beast. I don't think an electric will be able to move as much air as this monster without pulling some serious...

1040841 I agree with the above. My 89 tossed its carrier bearings at a similar mileage. I blame myself really for never changing the oil in the rear end. If it is a wump wump wump sound that varies with rear wheel speed, there is a really good chance that this is the problem. Cheers...

1040833 Hello, I have a 93 Grand Cherokee with the V8. I have replaced the thermostat with a heavy duty one that opens farther, installed a 3 row radiator, new water pump, severe duty Hayden Fan Clutch, new temp. gauge sending unit, all hoses and so on. My Jeep cam with the heavy duty cooling...