Seriously. I just checked the diff today for the first time ever. It hadn't been leaking and it's so awkward to get to without a hydraulic jack, etc, etc... just lazy. Anyway, when I put my little finger in all I could find was thick green slimy foam. I know I have the LSD (posi) since I have the G80 RPO code. Is this green foam normal, and if I want to add some fluid, what should I add ? My fbird owners manual says to only add part number 1050010 if I have rear disc brakes. btw I used to get a clicking sound from the rear area in general, at slow speeds, but it has gone away by itself.
Thanks

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88 GTA 5.7 TPI Charcoal Grey Bone Stock except for loose muffler which makes it a bit louder than normal.

 

Nevermind. The dealer said green is the right color, and the that foam is normal.

 

Mine is never foamy or green in three vehicles when I check or change the rear lube. Sounds like some sort of water or additive contamination to me. I would drain that SOB now and put in some Mobil 1 75W-90. Just my $0.02.

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1990 IROC 350
Mods: Too busy trying to make it run right to mod it.
Airfoil, Dynomax cat-back, MSD coil, 180 t-stat, Bald Eagle tires,
Hypertech fan switch, Accel 23# injectors, Holley AFPR, ported plenum,
Ported Daytona Yellow stock base, Moroso valve covers, other stuff,
Ruger P95DC, hot wife, new oil filter, thick rubber floormats, no cats.
18.0 @ 85MPH since I'm one big-a$$ MF
"It's better to have and not need than to need and not have."