4.0 ohv noise
I test drove a Ranger the other day that I'm looking at buying. It's a 1998 4.0 ohv with an auto tranny. When I accelerated there was a noise coming from somewhere. The noise is like a jet engine starting up, it's somewhat high pitched, but only lasts for a short time.
During acceleration you would hit 1500 rpm's and the noise would come and then you'd hit 2000 rpm's and the noise would go away. Keep in mind, the noise occured only during acceleration, and no other times (you could be going 65 mph and the noise will not occur as long as you aren't acceleratin. If you had it in park or neutral, the noise would not occur at all when you reved the engine.
Could it possibly be something with the driveshaft? I was thinking wheel bearings, but that would be more of a grind and the noise would happen whenever the wheels move, not just during acceleration.
I'm getting it checked out my a mechanic this week, I would just like to get a heads up. When the guy bought the car, the dealer said it was just one of those noises that occurs. He bought it and has been driving with the noise for a year and nothing has gone wrong with the car, it works just the way he bought it. The dealership also knew about the noise when they got it and looked it over, there was no sluggish performance or anything going wrong.
1997 Chevy Blazer, 4.3 v6, 156k miles