rear diff leak

[poorforever]

just put boss on lift to try new rims,rear diff is wet on lower part of cover no oil on top. 700 miles if i remove should there be a gasket there. Checked oil level and it is fine

 

[Sesshomurai]

I saw that on mine. Not sure why. Its a black silicone seal. No gasket.

 

[VoodooBoss]

It's most likely the diff venting. You can buy a catch can for it and there are a couple of threads on the Bobs product in this forum.

 

[ArizonaBOSS]

You have a warranty for a reason...

 

[poorforever]

the leak is from bottom of cover really dont want to go back to dealer, thinking just remove and reseal it. best sealer and diff fluid?

 

[Champale]

The very first time I hit some pretty high speeds in my Boss (140+), I noticed the diff leaking, too. Well, I thought it was leaking because I only seemed to find fluid on the bottom but the more I looked with my flashlight I saw that it was coming from the breather up top. There is actually a Ford part that you can install and it looks like a tiny turkey baster and it screws right in.

Here is some more info:
http://forums.themustangsource.com/f813/ls-rear-differential-vent-500746/

Before you take apart your rear end, I would want to be 100% certain that it wasn't the breather. Have you recently hit some high speeds?

 

[06mach1]

Should I assume that you tried to tighten the cover bolts? I have seem them loose.

 

[2012YellowBoss]

Should I assume that you tried to tighten the cover bolts? I have seem them loose.

Correct, I think they are 24 lb ft. I find I have to re-torque them after an oil change and some runs at the track. I have also been told to use lock-tight from the racers.

 

[poorforever]

all bolts were snug looked all over rear end see nothing wet at all.have not driven car in 2mo. It on lift because here in ct. when they see a snow flake its time to coat the roads with salt.