i just got my 99 suburban about a month ago. today i floored it from a stop and it sounded like a fan blade hitting something when i was moving and floored it there wasnt any sound what should i check
I'd be checking for possible broken engine mount. Sound like your engine is lifting a bit and the fan may be hitting the schroud. Check to see if there is any indication of rub marks on the fan schroud.
If the fan is rubbing it will be up under the top of the schroud. I had a vehical that did this. Engine mount wasn't totally broke. It would just lift a little under heavy torque. Try opening the hood, put it in gear and hold the brake hard, and give it fuel. See if it makes the sound. Good to get someone to watch from the side.
Maybe? the trans. torque converter shield, it sits very close to the ring gear/flex plate. Mine was fine until I removed it for inspection, then every now and then it would kick up a terrible racket at just the right throttle. I had to adjust the shield to keep it from rubbing against the ring gear.
just checked today and found that one of the bolts backed out of the converter. I pulled all the bolts out and put locktite on them and then put the inspection cover back on without the spacers and no more noise
thanks for all the info
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