1991 Chevrolet Silverado 91 Chevy Pick 350 V8 And 4l80e Trans Out Blue Started

1991 CHEVROLET SILVERADO
200,000 MILES
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I have a 91 chevy pick up with a 350 v8 & a 4l80e trans out of the blue it started slipping in all forward gears .. obd trouble code flashes 85 ? what does this mean and what can i do about it ?
Jan 16, 2013 at 7:05 PM
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HMAC300
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its an undefined problem so have trans guy look at it it's probably time for rebuild
Jan 16, 2013 at 8:15 PM
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