As I was driving to work the other morning, I noticed my car is making a high pitch humming noise when I accelerate. It usually doesn't start until about 3rd gear. I read a couple of threads on here that say those symptoms usually point to a failing transfer case. I am dropping the evo off at the shop to have it looked at on Tuesday, but I am wondering if it could possibly be anything else? My brake pads are getting worn but I doubt that would be the case. The car is a 2006 evo mr with 36k miles if that helps with anything,and it is hard to pinpoint the location of the noise. This is making me lose sleep at night and I appreciate any input you guys may have! Have a good new years

 

If not the transfer case, it could be your rear end, my rear end whines... Just change all your fluids and put Redline products and see if it helps...

 

My car does the same thing, with 145k on the clock. I'd have to hear the noise but I'd say its most likely the t case, that's what my problem is. As long as its not screaming you should be fine...I'm not worried about mine. I'll rebuild it when I have some spare cash.

Change the fluid in it, and make sure it's actually full. If its not filled to capacity then it's doing damage. Also, i would advise to only use the oem diaqueen for the tcase. Nothing else.

 

The harder I step on the gas the louder it gets. It does get pretty loud and very very annoying. Is it normal for a transfer case to go out so early on an evo? I find that hard to believe.

 

typically the humming you hear is from a failing differential box. lol in past experience i know they wine like that right before they fail. as in seize up lol.. better get it looked at but i wish you luck. i doubt tho its the transfer case. unless u launch it all the time. let us know what you find

 

also like they stated above it could be a fluid problem. u might just have little to no fluid in there and that would certainly cause the humming your hearing

 

That seems like very low miles if they are easy miles. If you go to the strip regularly then thats different. My diff whines when I decelerate, not accelerate. Good luck.

 

mine does the same thing at higher RPMs when decelerating. what causes that? anything to worry about?

 

A transfer case can go bad early or late depending on when the fluids were changed. Most transfercases go bad because they are not properly lubricated. Not because of "abuse".. Someone probably changed the fluids some time ago and didn't fill it back up properly OR used incorrect fluid to put it back in..

 

Like others said have you changed the driveline fluids?? If so what fluids are in there??

 

I am getting the same whining noise too. but not that loud, still i think i will visit shep soon for a re-build transfer case.

 

Doesnt sound like a t-case to me. If it was the t-case it would whine even at low speeds and get louder the faster you go. With only 35k on the car doubt it.

 

Mine did the same thing last year it was my transfer case also still get it checked good luck

 

I changed my transfer case and transmission fluid at around 29k in aprilish using synthetic fluid. It is about time to chnge my rear diff fluid as well.

 

What fluid exactly did you put in the trans and TC?