I recently purchased an 06 ford e350 van with a 6.0 diesel engine with 150,000 thousand miles. At approximately 55 mph a humming noise comes from the passenger side of the engine compartment. Slightly letting off the gas eliminates the noise for a few seconds. To travel above 55 I must constantly massage the pedal or keep my speed around 50 to avoid the high pitched humming noise. The local dealership recommends dropping the transmission to have a look. What thinks you?
Very hard to say which way to go with out hearing the noise first hand, although I doubt that removing the box will be advisable at this stage, does this noise correspond with engine speed or road speed predominately?
May, 3, 2012 AT 12:21 PM
When its making the noise see if turning the wheel has an affect on the sound.
May, 3, 2012 AT 8:56 PM
Noise is related to road speed, at and above 55mph. Turning the steering wheel is not a factor. I have read of a few people who have described a similar scenario and ultimately found it to be the torque converter. Other things I've read would seem to contradict this as a plausible scenario because the converter noise should occur with the wheels still.
May, 4, 2012 AT 1:12 AM
I would suggest running it on a lift and listen to the front and back of the transmission and try to isolate the noise
May, 4, 2012 AT 1:44 AM
I was told that getting a vehicle up to 55 mph on the lift was too dangerous do to the level of vibration.
May, 4, 2012 AT 1:57 AM
There is a tool called an engine ear that you can attach leads to different parts of the drive train and listen to diferent parts of the drive train @55
May, 4, 2012 AT 2:11 AM
Thanks, I'll suggest it. Do the descriptions I gave lead you to suspect anything?
May, 13, 2012 AT 2:43 AM
May, 13, 2012 AT 2:25 PM
HAVE YOU GOT UNDER THERE AND REALLY CHECKED THINGS OUT GOOD?
IN THE FOLLOWING LINK....EVEN THE SLIGHTEST BIT OF SLOP COULD CAUSE SOUNDS AND LATER VIBRATIONS
SEEMS THAT WITH MANY "SHOP DIAGNOSIS'" NOW DAYS, "RAPING A ONE TIME CUSTOMER'S BANK ACCOUNT" IS THE KEY WAY "KEEP THEIR SHOP GOING"
CASE IN POINT, LADY THAT COMES INTO THE RESTAURANT MY WIFE MANAGES, SHE HAD BEEN TO A LOCAL "TRANNY OFFENDER'S SHOP" (THEIR NATIONAL NAME IS POPULAR ANYWAY). THE LADY WAS IN TEARS BECAUSE THEY WANTED ABOUT $3000 TO REBUILD HER NOISY, ALMOST "TERMINAL" TRANNY. SHE EXPLAINED THE NOISE STARTED THE DAY BEFORE AND WAS NOT AS BAD TODAY.....BUT STILL WAS THERE
MY WIFE SUGGESTED TO HER THAT SHE HAVE "ME", AT LEAST LOOK AT IT OR MAKE OTHER SUGGESTIONS BEFORE SHE "GAVE IN"
AFTER I GOT OFF OF WORK (PLUMBER), SHE WAS AT MY HOUSE, I GOT AT LEAST AN HOUR OF NERVOUS, EXCITED, AND WORRIED JABBER IN MY EAR, OF HER TAKE ON THE SITUATION.....BEFORE I COULD EVEN LOOK AT IT!
UPON HER INSISTENCE, SHE DROVE ME AROUND FOR ABOUT 20 MINUTES, AND AFTER 2 STOPS AND LOOKING AROUND UNDER HER CAR. I TOLD HER I COULD REPAIR IT FOR $1000. SHE WAS GRATEFUL AND WENT BACK TO MY HOUSE. THEN SHE STARTED TO SET UP A TIME TO DO IT....AS WE SAT IN MY DRIVEWAY
I TOLD HER I COULD DO IT NOW, AND I WOULD KNOCK OFF AN ADDITIONAL $500 IF SHE WOULD HELP. (SHE HAD NEVER HAD SUCH AN OFFER)
I HAD THE GAL LIFT HER CAR WITH MY FLOOR JACK, I PLACED 2 JACK STANDS UNDER THE REAR AXLE
AS SHE STOOPED DOWN TO ASK WHERE, AND SEE WHAT THE PROBLEM WAS, I HAD MY POCKET KNIFE OUT
...........CUTTING A PLASTIC SHOPPING BAG OUT FROM AROUND THE REAR OF THE TRANSMISSION AND WOUND UP ALL IN THE DRIVESHAFT'S FRONT U-JOINT
........OF COURSE I CHARGED HER NOTHING!, THE WORST PART OF THE DEAL WAS LISTENING TO THE "WHAT IFs" AND "WHINING" BEFORE I TOUCHED IT!!!
I DO HAVE A PRETTY GOOD REPUTATION AT THE RESTAURANT NOW....SEEMS I CAN DO IT ALL!
MORAL OF THE STORYSHOPS "WILL" "GET YOU" SOMETIMES (I DOUBT THEY EVEN LOOKED AT IT, SHE SAID THEY HAD DRIVEN IT FOR 5 MINUTES)
MY PROVERB: "NOBODY CARES ABOUT MY STUFF, AS MUCH AS I DO"
GET ALL THE FREE HANDS ON HELP YOU CAN (TO INCLUDE YOUR OWN) BEFORE A SHOP COMES INTO PLAY (AS YOU SEE, THEY ARE NOT ALL BAD, BUT THERE ARE SOME OUT THERE!)..........DRIVE OVER A SHOPPING BAG LATELY???
I'D GET SEVERAL OPINIONS BEFORE I COMMITTED TO JUST ONE