Whine at speed

[yellow dog 62]

I am less than 100 miles into a complete fluid change. I put amsoil synthetics in tranfer case, transmission and both differentials of my '88 FJ62 with 228K. It has been properly maintained according to the records I received when I purchased it. Now at speeds of 40 MPH and above I have a low pitch whine that goes away as soon as I let off the gas. Any ideas? Thanks

 

[bonzai]

mabey your gear box?

has it allway done this

 

[euclid]

Tell us more about the noise. Does it vary with speed, rpm, or any other factor?

 

[archie]

how loud is it? Is it as loud as the engine?

 

[yellow dog 62]

Not quite as loud as the engine and doesn't seem to vary with speed. It stops as soon as you let off the gas and starts as soon as you push the pedal.

 

[euclid]

High pitch whine?
Does it go away at some speed?

Describe the sound... details help diagnosis.

 

[yellow dog 62]

Not a high pitch whine. More of a drone sound. As stated earlier it goes away when you get out of the gas. Have not had it over 75 mph but it was there at that speed.

 

[benw4x4]

Hey I just thought I would chime in, Have you checked your flanges? If they are a bit loose you will get a slight wine when you get on the gas. Might not be the prob but it never hirts to check. Hope you get it figured out....Ben

 

[euclid]

Yep, I would start by making sure you don't have slack in the pinion or any loose bolts where the driveshaft bolts up on either end.

 

[Cruzer_89]

My 62 made that noise too and it turned out to be the Tcase. My might consider a rebuild kit before things get nasty.

 

[yellow dog 62]

Odd that it didn't make this noise prior to changing all fluids (used Amsoil syn.). Who is a good source for the rebuild kit? Thanks

 

[euclid]

Before a rebuild I would find a good drivetrain shop and see what they think. They will have a cool lift that allows them to bring your truck to highway speeds while they stand under the truck and find the noise.

It is strange that it showed up at the time you did your fluids. I can't think of a reason that fluids would make it happen.

 

[chrs_mrnd]

doing the same

MY 1989 62 145,000 was doing the same thing and now the truck barely moves at three thousand rpms. I checked the fluids and they are fine. I had the fluids replaced last year. any suggestions.

 

[yournamehere]

MY 1989 62 145,000 was doing the same thing and now the truck barely moves at three thousand rpms. I checked the fluids and they are fine. I had the fluids replaced last year. any suggestions.

that sounds like a slipping clutch or really bad compression.

 

[dallen341]

I am less than 100 miles into a complete fluid change. I put amsoil synthetics in tranfer case, transmission and both differentials of my '88 FJ62 with 228K. It has been properly maintained according to the records I received when I purchased it. Now at speeds of 40 MPH and above I have a low pitch whine that goes away as soon as I let off the gas. Any ideas? Thanks

Is it possible that your front driveshaft is engaged? I know the vacuum solenoids will burn out and if someone (without your knowledge) engaged the 4WD button on the dash and then disengaed 4WD, it may be that you are in 4HI. I suppose you would get the dash light indicating you are in 4WD though.

Just a thought.

Don

 

[euclid]

No clutch on a 62.

that sounds like a slipping clutch or really bad compression.