Did you ever find the cause of this noise? I have a 2000 s-10 pickup with the same symptoms.
Friday, March 6th, 2015 AT 6:15 PM
No, I did not find the cause of the problem after having many things replaced. But about 3 months ago, the noise just suddenly stopped and now my 4 wheel drive isn't working. That's okay though, I rarely use it. So, my guess is that it was switching itself into 4 wheel drive while I was driving at higher speeds and that was the cause of the "helicopter noise." Good luck with your problem, I hope it gets resolved and doesn't make you as crazy as mine did me!
Friday, March 6th, 2015 AT 9:08 PM
Thank you Kim. I have a 2001 Chevy Blazer that I had to have the 4 wheel drive computer module replaced in but it just stopped working all together and had no symptoms like you or I have experienced this time. I know that module was an expensive fix so maybe I will try unplugging the module to see if that stops the noises.
Saturday, March 7th, 2015 AT 10:29 PM
YOU GUYS KEEP IT GOING
I'M ANXIOUS TO SEE WHAT YA'LL FINALLY GET FIGGERED OUT!
WILL REMAIN SEATED ON THE DRIVER'S SIDE
IT WILL SHIFT EVERYTHING
BOTH ARE STILL VERY PERTTY
I'VE BEEN TOLD BY YOUNGSTERS THEY LOOK A LITTLE OLD FASHIONED
I RECKON I'M LOOKING A LITTLE THAT WAY AROUND THE EDGES TOO
REGARDLESS, ALL THEM GALS,
YOUNG OR OLDER STILL TURN THEIR HEADS FOR A LOOK-SEE!
(THAT WHAT REALLY COUNTS ANYWAY. OTHER THAN LONG TERM, RELIABLE, GO ANYWHERE TRANSPORTATION!)
PIC 3) THE ONLY 2 WIRES TO THE STOCK 1977 TRANNY AND TRANSFER-CASE (MR. BACK-UP LIGHT SWITCH!)
I'M STILL AVAILABLE TO HELP YA'LL FIND A REAL VEHICLE, JUST LET ME KNOW!