Milky Fluid...

[5150DSM]

Searched but only found one un-resolved related issue. Here goes...
I drained the tranny today after putting 10K on it since the swap and the fluid I pulled out looked a lot like milk, or maybe Similac(baby formula)WTF . It was a kind of chalky off-white color and had some black streaks running through it. It also was very thin and seems to have lost a lot of it's viscosity.
I have never seen this in a manual tranny so I thought I would run it by you guys and see what you think. When I installed the tranny I filled it with Valvoline 75-90W gear oil. I drive pretty hard usually but I haven't raced since I got the tranny, it's never seen a shift over 7K.
Anyway, I refilled it and the transfer case with Royal Purple Synchromax today and the tranny feels great but I would still like to know WTF happened to my old fluid. Thanks for any input, ideas, etc... that you guys can offer.
Aloha
Tony(5150DSM)

 

[1stGenRocks]

Is your vent cap on the trans or broken off? Sounds like it might have gotten some water in with the fluid. Do you wash your engine bay?

 

[5150DSM]

Vent cap?
I am not aware of a vent cap on the MT, where is it? Yes, I have washed my engine bay recently and now that you mention it... The fluid looked a lot like the emulsified grease that washes out of the bay. Hmmmm......

 

[1stGenRocks]

come to think of it i may be thinking of the vent on the tcase. ill check later tonight when i repack my trans and tcase into seperate boxes to ship. damm ups wont take it because its over 150 lbs

edit: no vent cap just the 2 rubber elbows that point down to let fumes out and not let in water. make sure they arent torn and are pointed the right way.

 

[5150DSM]

Yeah, it was the damn rubber elbow. Looks like I got a bunch of degreaser/water in the trans. I'm sure I probably ruined the Royal Purple I refilled it with too. Fun, fun, fun, one more thing to fix before I can send my block out. Thanks for the replies, they jogged my mind just enough to figure it out.