Having problems with your Ford Expedition EL ?

Strange loud buzzing noise on 1997 Ford Explorer XLT

\015 Driving about 40mph in 1997 Ford Explorer 4x4, 120k milage, going on the flat, not much load on the engine, not in fourwheel drive. Sudden ZZZZZing noise, very loud, then stops. Happened four times over the course of 20 mins or so of driving. No discernible change in engine speed or vehicle speed...Transmission? Sounded almost like the starter motor spooling up at a very fast speed and then disengaging? All the belts and fluids seem fine. Drove about 300 miles subsequently and noise has not repeated since.\015 Posted / edited by AnonymousUser on : 22-02-2021

Answers :

Only thing that comes to mind with description is maybe heat shield on exhaust, getting loose. Wait until vehicle is cooled off and get under there & check any heat shields you see wrapped around or near exhaust, above it attached to floor of vehicle etc, and give them all a little shake or rap with rubber hammer or similar to see if any rattles are present.
Repair Help & Product Troubleshooting for Ford Expedition EL

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