75-90 or syncromax
 

about 5000 miles ago i chacnged my tranny fluid to royal purple syncromax and about 2 days ago it was making some weird noise when i downshift without revmatching. so today i took it to dealership n have them check it out

The sad thing is that when me n the tech guy test drove the car... it didnt make the noise i came in for... so i told him if he can just simply check my tranny fluid for me. so he jack the car up n got some of the fluid out n he was telling me how it's not the right tranny fluid ... it's too watery so he showed me the tranny fuid they put in the car n it was really thick. n he told me that i should change back to 75-90

my quiestion is i know that royal purple has 75-90 available. but which 1 is better? the 75-90 or the syncromax

the other question is that when he took out the tranny fluid he was showing me how there's some metal shavings not visible but under sun u can kinda see it reflecting in the tranny fluid and the syncromax is the the cause for that is that true? i thot it's normal to have some metal shavings...:dunno:

first off, why would you downshift without rev matching?
75w90 is correct
syncromax is for tranny's that use auto tranny fluid (ie. not the rx8)

Uh why wouldn't you search here first? There are so many posts that tell you RP 75W90 MAXGEAR!

From my experience metal shavings in a modern transmission is NEVER EVER normal. It's an indicator of damage. Unless you grind them, I'd agree that the root cause was the syncromax.

Syncromax ? wtf ?

MAXGEAR BUDDY, MAXGEAR !

Yea, I would definitely switch to Maxgear. Did you tell the dealer you switched to synchromax? If so, is it documented on your invoice? If it's not documented on your invoice I would keep my mouth shut and say you use Maxgear all the time.