1987 Ford Bronco II Making Noise - Drive Train & Driveline


Question: When accelerating from a stop, grinding noise comes from (apparently) the rear-end and the car appears to be laboring. This lasts until a speed of about 10MPH is reached, when the noise/laboring ceases. Otherwise, vehicle runs great considering 276K miles on original engine. 4WD, auto, 2.9 V6.

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Technican: OOn those Bronco II's they usually have a rear constant velocity style driveline. They can cause what you are experiencing. Crawl under the vehicle, grab the driveshaft and try and move it side to side. Watch the rear, where the shaft mates to the rear flange. I expect you will find a lot of movement and if you were to jack up the rear wheels and let them be free turning, you would hear your noise you are experiencing. That CV joint can be replaced by taking the shaft to a good driveline servicing company. A new shaft, if it is still available, is a quite spendy item. and let me know if this isn't your answer. Bill

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