My friend got three quart of Amsoil Synthetic Manual Synchromesh Tranny Fluid lying around in his garage. It was supposed to be for his manual civic but he traded it in. I'm wondering if this will do for the RX8's (not so robust) transmission.

I tried searching the whole name but didn't come up with any results concerning this specific fluid.


Here is a link to the oil. According to my friend, it is 5w-30.
http://www.amsoil.com/storefront/mtf.aspx


Got me a little worried when I read this thread:

https://www.rx8club.com/showthread.p...l+transmission

 

Go with Redline MT 90. It's the only MT fluid that hasn't caused anyone problems. Anything else people have tried has been hit or miss at best. Royal Purple's transmission fluid has nearly a 100% tranmission failure rate.

$20 for 2 quarts of Redline MT90. Can't go wrong with it.

 

I know about MT 90 but that doesn't exactly answer the question though.

 

Sorry, I more meant that I wouldn't mess with any other fluid. It might work, but when there is a proven alternative for so cheap, I wouldn't risk messing around with it. It's not worth the cost of a new transmission.

 

This is the stuff you would want to use in the tranny if you are going with Amsoil:

http://www.amsoil.com/storefront/mtg.aspx

I've also heard many good things about this stuff if you have the money:

http://www.fcsdchemicalsandlubricant...ission%20Fluid

You can get the Motorcraft stuff at Ford dealers.

 

really,

that is interesting as i ran rp in my tranny for about 70k miles..and never any issues..

but i dont treat my transmission like i am on pinks, but it has over 12 track days on it..

hey, but what do i know..

beers

 

And i have some sporadic 3rd gear grinds while upshifting with MT90 on my second transmission. I'm a young ******* so for sure i treat the transmissions bad when tracking unlike swoope with his gentleman manners

 

you are going to love my pm!

beers

 

Marriage proposal? I'm already engaged =)

 

doubt it,

you are going to laugh!

beers

 

after you read my notes on personal tranny notes.

i would do a flush with stock silly stupid tranny oil.

then do the same with a 90 / 140. then change to a what ever you like..

i am having very good luck with b&g syncromesh..

both trannys like it. just one is louder than the other! damnit.

beers

 

That's what i've done.
The guy that sold me this transmission washed its interiors with naphtha\diesel oil because it had been sitting for a long time. I did run on crap lubricant for less than 1000km, then swapped another time with what i was using before (shell transaxle oil ) and then mt90.
I don't know why i have that lame grinding in 3rd though.

 

As stated, DO NOT use MTF in your transmission. AMSOIL makes fantastic products, but 5W-30 is not the correct viscosity for our transmission. I run AMSOIL MTG (75W-90 GL-4) and have had zero issues.

 

Took 13 posts to get the answer . Much appreciated, BRODA.

 

i ran amsoil synthetic for a few months. the transmission felt notchy with it and i went back to oem stuff.

my expirence with RL and RP showed a vast improvement with the feel vs oem (issues with RP several years later aside).

 

Which specific RL and RP do you use?