MySc4fever

iTrader: (7)

Ok family. I have a wierd humming noice that only occurs when my foot is on the gas. It's like a whirling, whinning sound, (like a bad turbo)that sounds like its coming from underneath the engine and floorboard.

I have a 1995sc400, with the stock engine.

It is not from the soundsystem, which has been in my car for several years without an issue. but it is a nuisance when the radio is low.
As i said, it only occurs when the gas pedal is pushed.

It is the most noticeable, when cruising down the highway.

any suggestions?

xspsi6

iTrader: (31)

Most likely a rear diff going south from lack of lubrication due to bad seals.

MySc4fever

iTrader: (7)

if these parts are lubricated now, and the seals replaced, will the noise go away and the diff. be saved?

xspsi6

iTrader: (31)

Nope it's to late.

xspsi6

iTrader: (31)

Good news is you can get one cheap like under 100.00,I had one in the fs section for 85.00 and ended up tossing it in the trash because nobody wanted it.

MySc4fever

iTrader: (7)

sheesh. story of my life. always too late.
im gonna try to lube the diff. to see if it helps tomorrow.

Luv2xl

iTrader: (5)

could be a wheel bearing as well..

MySc4fever

iTrader: (7)

even if its only on while accelerating??????

MySc4fever

iTrader: (7)

Ok. Lubricated the diff.
Noise still remains.

MySc4fever

iTrader: (7)

installed new wheels and tires, and got alignment.
noise still here.................wtf!!!!!!!

xspsi6

iTrader: (31)

It's the diff carrier/pinion bearings so nothing will help other than a new diff.