Trans and Transfer Case Color

[kyoo]

Hey guys

new member here - I've been using Amsoil for my 2006 Mitsu Evo -

Motor - Amsoil 10w30 atmqt
Trans - 75w90 GL4 trans fluid
Transfer Case - severe gear 75w90
Cusco 1.5 way rear diff - severe gear 75w90 (considering switching to 75w110).

Anyway, I was wondering - everytime I've changed my transmission fluid with amsoil, the oil goes from a very light golden clearish color to a very very turqoise color - similar happens for my transfer case and rear diff except they turn maroon.. Is this normal??

Also, I'm considering switching my diff fluid from 75w90 to 75w110. I've spoken to cusco and they recommend 80w90 for the street and 75w140 for more track cars. My car drives mainly on the street and autocross twice a week. Opinions? Should I stick to 75w90 or switch over 75w110? My car produces about 370whp 360 lbft of torque.

Thanks for all input!

 

[kyoo]

bump

 

[Pablo]

For SURE you should change over to the 110. No doubt about that.

Color pretty much means nothing. You should get a used oil analysis if you are concerned. I have seen the dye used in some of Amsoil's oils turn a deep red. Just means the dye color changed. Some oils go from purple or clear amber to brown. Has no bearing on the lube.

So are you saying MTG (which is very light color) goes turquoise blue? That does seem a bit odd, for sure grab a sample and run a used oil analysis.

 

[kyoo]

Originally Posted By: Pablo
For SURE you should change over to the 110. No doubt about that.

Color pretty much means nothing. You should get a used oil analysis if you are concerned. I have seen the dye used in some of Amsoil's oils turn a deep red. Just means the dye color changed. Some oils go from purple or clear amber to brown. Has no bearing on the lube.

So are you saying MTG (which is very light color) goes turquoise blue? That does seem a bit odd, for sure grab a sample and run a used oil analysis.


Thanks, I haven't noticed too many metal shavings for the trans, but the trans is much notchier with the amsoil mtf. there used to be redline mtf in there, but that was many changes ago. I shoulda get a used oil analysis.. the color change is so crazy though, I can't think of any explanation for it. the whole fluid turns an opaque turquoise color. i should take a picture next time.

 

[kyoo]

bump for anyone else whose transmission fluid comes out turquoise...