LOUD PITCH BUZZ/HISS and a Leak in the rear

[kiddiccarus]

Hey guys I was changing my oil today and heard a high pitch sound comming from the rear of the car. Well I finished the oil and backed it up on the ramps and took a look. The Differential cover is covered in fluid, the under of the car at that area is covered also. I thought the sound was comming fromm the exhaust but as I listened to the pipes (Dual off of a Y Pipe) I only heard the normal exhaust sound. When I got to the rear the sound was comming from the tank area or above it. What do you think, Could it be in the tank or the fuel pump?

 

[kiddiccarus]

Anyone?

 

[Stinger]

Sounds like the fuel pump...they all do that. What's the problem?

 

[kiddiccarus]

The main problem is the noise. I can hear it inside of the car while I am driving and it is pretty loud. Is that a sign to replace it because it is going or is this something that I dont have to worry about?

 

[Stinger]

Well, it's still probably a normal thing. I'd make sure the noise you are hearing by seeing if it does it when not moving (isolates the pump from the rear end).

Stinger

 

[Lx89Stang05]

sounds like the sound of a normal fuel pump sound.

 

[kiddiccarus]

I checked it tonight and yes the sound remains when it is parked it idled for 30 mins, the sound did not begin until it began to warm up hough.

Here is the other Question-- while I was under there The under side of the car was coated in fluid, I am new at some of this stuff so I dont know what it is, the differential cover is also coated. What do I do to fix this?

 

[Stinger]

What kind of fluid was it?

 

[Stinger]

oh, and where did the fluid start (how far towards the front of the car does it go?

 

[kiddiccarus]

the fluid looked like oil (black and used) I dont think it was transmission fluid because it was just around the rear axel area directly above the Diff, It has been there for a while I think but since it is cold and I drive 40 miles each way for work it may look like that quickly. I have had one issue that I dont know is the rear or the tranny, when I back out of the garage (If not warmed up) it will back up, and when shifted into D or OD it will sit there like in neutral until it is ready or until I rev it up. does this issue coenside with the fluid found maybe?

 

[Asha'man]

What does the fluid smell like? If it stinks it could be gear oil, if it's sweet or burned (if it's indeed black), it could be tranny fluid, etc.

Ash

 

[kiddiccarus]

no smell that is why I think it may not be recent, and the the fluid dont go past the driove shaft it is above the rear axel

 

[Stinger]

Check the level of the trans fluid...if it's low it will do just as you described.

Your front seal in the rearend could be out and it's slinging oil out in a circle (which will spray on the underbody right where the rear and driveshaft bolt together.

 

[kiddiccarus]

Is the front seal (to my Ignorance) on the drive shaft side?
The Fluid Level is just above where it should be on the Trans I checked that the other day when I first seen it.

How hard is it to replace this seal?

 

[papaford]

its probably just grease that has been slung up from the greaseable u-joint in the driveshaft

 

[kiddiccarus]

That makes sense. I will get under there and do a little Molly Maid action on it and have her shiny to see if it is a reoccurring problem.