Leaking rear differential

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Feb 15, 2004 | 11:23 PM

goalie31

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From: Hoffman Estates Illinois

Leaking rear differential

I think i have the dreaded rear diff leak on my 99A4. Haven't looked at it since it's sitting for the winter. What area should I look at and can I fix this myself?

Bill

Feb 15, 2004 | 11:32 PM

kirbyloid

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From: Houston Texas

Re: Leaking rear differential (goalie31)

What color fluid is leaking?

Feb 16, 2004 | 07:30 AM

Mr. Jones

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From: Bedford Va.

Re: Leaking rear differential (krl)

look where the axles exit the differential.
fluid color on a 99 i would guess brown

Feb 16, 2004 | 04:23 PM

jjcslynn

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From: Dover AFB DE

Re: Leaking rear differential (Mr. Jones)

I've got it too, arghh......

Feb 16, 2004 | 06:31 PM

RogueVette

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From: TurtleCreek Twp Ohio

Cruise-In III Veteran

Re: Leaking rear differential (goalie31)

Quote:

I think i have the dreaded rear diff leak on my 99A4. Haven't looked at it since it's sitting for the winter. What area should I look at and can I fix this myself?

Bill

Most likely the rear diff, very very common problem. Also not an easy fix, You have to take out the rear diff, take it apart and replace the gasket. Mine has leaked since about 14K miles and I was just too lazy to take it in for warranty work. Now I'm just waiting for new gears because they do all the same stuff I just listed.

Feb 16, 2004 | 07:43 PM

Mel 2001

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From: las vegas nv

Re: Leaking rear differential (goalie31)

Me too again. At 5000k at 5500K now at 27200k :banghead:

Feb 16, 2004 | 09:42 PM

goalie31

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From: Hoffman Estates Illinois

Re: Leaking rear differential (goalie31)

Fluid is red, dots on the floor near the rear of the car. I have a 273 in the rear now. so it might be a good time to move up to a 315. I guess I'll start looking for a core. :confused:

Feb 16, 2004 | 10:13 PM

kirbyloid

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From: Houston Texas

Re: Leaking rear differential (goalie31)

Those dots are transmission fluid rear seal probably not Rear End as the fluid is very different. I have same problem and would like to move from 3.15 to 3.73 rear end. When you change the rear it would be easy to replace rear trans seal.

Krl