surfmore72
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this is not the same issue i posted a few weeks back...different vehicle.
I just bought a 99 chevy express 1500 conversion van 120k. the van has a newer drive shaft that the previous owner didnt know anything about. it didnt have plates on it so i wasnt allowed to test drive it. he must have taken it up to 41mph during test drive..... :angel: At 42 mph a loud whine develops from the back, at 48 it goes up an octave or two. at 52mph it stops. when i get off the accelerator the noise stops. when i put it in neutral it stops. when coasting in gear it is barley noticeable when slowing down. topped off rear diff fluid (was an inch below fill hole). still an issue. some fluid is coming out of (bare with me here) where the differential meets to driveshaft. not the yoke but the seal where it enters diff. im really handy with mechanic stuff i just have never owned a truck/van or done anything with rear differentials. what do you guys/gals think? is this even an issue? ive been researching for a while now. somewhere i heard i should try rotating the drive shaft (like its out of balance or something). any help is appreciated. especially budget friendly ones
thanks
e
I just bought a 99 chevy express 1500 conversion van 120k. the van has a newer drive shaft that the previous owner didnt know anything about. it didnt have plates on it so i wasnt allowed to test drive it. he must have taken it up to 41mph during test drive..... :angel: At 42 mph a loud whine develops from the back, at 48 it goes up an octave or two. at 52mph it stops. when i get off the accelerator the noise stops. when i put it in neutral it stops. when coasting in gear it is barley noticeable when slowing down. topped off rear diff fluid (was an inch below fill hole). still an issue. some fluid is coming out of (bare with me here) where the differential meets to driveshaft. not the yoke but the seal where it enters diff. im really handy with mechanic stuff i just have never owned a truck/van or done anything with rear differentials. what do you guys/gals think? is this even an issue? ive been researching for a while now. somewhere i heard i should try rotating the drive shaft (like its out of balance or something). any help is appreciated. especially budget friendly ones
thanks
e