NTO4Rx7

Any suggestions on best tranny fluid to use?
Purchased car with motor and tranny out and want to replace fluids before dropping back in.

Mahjik

iTrader: (1)

Any of the current synthetics will work just fine: Royal Purple, Neo, Idemitsu, etc..

vipers

iTrader: (8)

1993 is the first year for the fd..... and as stated above.. i personally like redline

Mahjik

iTrader: (1)

Only in America. Those who can get JDM FD's (like Canada) can get 1992 FD's.

Marek

iTrader: (2)

I liked Mobil 1 but I think they sold out and are really hard to find.

NTO4Rx7

Thanks for the advice guys. Was also told that GM Syncomesh was good to use and easy to get.

Cheers!

RX7Dragon

Just swapped in redline MT-90 in my FD, Ive used this on my 300ZX TT as well with positive results.

vipers

iTrader: (8)

yeah, i have it in my evo and have nothing but good to say... i swapped all my fluids for redline

Marek

iTrader: (2)

I wouldn't recomend the GM fluid. I would rather use a non synthetic gear oil then that stuff.

Nateness

iTrader: (7)

I used GYM Synchromesh in my MR2 turbo for years with great success, but I would not recommend it for the RX7.

In the long term, if you use GM Synchromesh in a tranmission that was not designed to use GM Synchromesh-type oils, there could be premature component wear.

turb0x2

iTrader: (71)

I have been using Amsoil 75/90 gear lube for the past 7-8 years and absolutely love it!

dgeesaman

iTrader: (7)

There are many gear oils that will work. I personally believe in synthetic GL-4 oil in 75w-90, which is why I prefer Amsoil MTG and Redline MT-90.

However, from an engineering point of view, there are three things that are most important:
- synthetic (better properties across the full range of low to high temps)
- 75w-90 viscosity
- GL-5 or GL-4 designed for synchromesh transmissions (some GL-5 gear oils are formulated for use only in differentials and compromise synchronizer performance and longevity)

Dave