I own a 1998 Grand Caravan Sport 3.3 Litre Engine with 174,000 miles. The ABS llight will come on and no guages work during this time the maybe a day or so later the Service Engine Light comes on then the ABS light goes off and the guages begin to work again then a day or so later the Service Engine light goes off and all is well. Then maybe a week or so later the whole process starts again. It doesn't seem to effect the way the vehicle is running. The last month or some the transmission seems to be slipping a bit. Is there any connection between all of this? Any Suggestions?