Whirring/ratcheting noise when backing off the gas

[SCMark]

This started yesterday. I have a whirring high frequency ratcheting noise when I back off the gas at 45+mph. Is this an issue with the lock up feature on the torque converter, or ???

 

[drdoom]

Mark that is the transfer case going out. Scores of threads here about it, and concise stickies in the transmission sub-forum. It will need a rebuild along with key upgrades.

 

[SCMark]

Thanks. I will look into that. I have also been researching how the torque converter works, and wonder what the symptoms of the stator one way clutch going out is.

 

[drdoom]

I would think you could do a stall test for that, not sure though.

 

[SCMark]

Obviously I want to pin down the problem before spending $$$. So how would I test the transfer case?

 

[1992fordgreen]

Also make sure it's not just an exhaust shield banging around or loose.

 

[drdoom]

Do all four of your tires match EXACTLY: brand, size, model, treadwear, and inflation?

 

[drdoom]

You have to open the case for further diagnosis, although a fluid sample may offer clues.