[jjjamn]

2008 GT500 Diff Leak after tracking or agressive driving.
I am running a 08 GT500 with a Saleen Watts Link on the rear (Dont think this is the issue). After my first track day I noticed lots of diff fluid leaking or dripping off the rear diff after 10-15 laps at Laguna Seca. I took 5-10 more laps and then called it quits because of the amount of diff fluid leaking from the breather on top of the rear diff.

I took the Shelby to the dealer for further inspection and they mentioned that the fluid might be too high because its leaking out the breather on the top of the diff cover. I had the level corrected and went back to Laguna today. After 5-10 laps I had diff fluid dripping from the read diff/axel again and called it quits.

I have the shelby in the shop again and I guess I will just have a hose and overflow/catch can installed????????

Any others with info or solutions? I have read many others with this problem but no solutions yet?

Thanks in advance.

[Snake Pliskin]

It's probably getting hot and pressurizing out the top breather valve. On offroad trucks we simply run a diff breather line higher up into the chassis and put a the diff breather on top. A length of rubber hose and two small hose clamps is all it takes. On trucks, this mod is for keeping your diff from sucking in water and mud. On your car it may provide just enough of an overflow while aggressively driving to keep fluid in your diff for the ride home. Might work...might not... but it is cheap and if it works you can brag to the other Shelby owners at the track about what a genious you are.

[jjjamn]

Thanks for the input.

I was going to have a line put in to a catch can and see how that does.

Curious if I should run a high performance diff fluid to see if that helps at all? If so, any suggestions?

Thanks again..

[Snake Pliskin]

I would guess the Shelbys' don't run crisco. Your diff fluid is probably already synthetic and has the appropriate friction modifiers that help the trac loc work the way it should. I'm a militec 1 ***** but I'm not sure if it would negatively affect the friction modifiers. I'm not a spokesperson for it but if you haven't heard of it, google it. Works great in guns, blowers, motors etc.

[PAzYearazzUP]

WATTS a Watts link? OK, so you set the rear up sorta tight? No, I think you sway bar'd my pumpkin gasket. Meaning, you are twisting the rear end housing, if not out of the breather or the pinion seal, where else would it show up.... The rear axle seal and wet the brakes?

Not too many places it can come out of is clean the housing, tweak the neighborhood a few corners, take a peek. It has to be like one tweak at the pumpkin cover is watch where that leak starts from. Not drive for hours. But load and spin the ring and pin.

[Snake Pliskin]

Oh yeah, congrats on your car. It is the current dream machine of most mustang owners. Hopefully you can enjoy it so much it will provide stories for a lifetime. I have a terminator and sometimes I'll go out and the wife asks where I'm going... "Cobra therapy" is all I say and she understands.

[jjjamn]

ok so I heard that the KR's are comming stock with a differential fluid expansion tank. I just went down to look at one and indeed they have included an overflow on the new GT500 KR diff.

I am looking to see if the KR's differential fluid expansion tank can be installed or I will just get something fabracated for mine.

Hope to be back on the track soon as this can get resolved.

[jjjamn]

PAzYearazzUP

Go here and search for "Watts Link"

http://www.saleen.com/SC101_Services...g.php?menuId=1