Just got an 04 RX8 with 56K miles on it.

I have 4 bottles of Motul gear 300 fluid from my Audi and wonder I can use it in both tranny and diff?

This is description:

MOTUL Gear 300
Specifically formulated for racing and high performance cars.
Circuit, Group A, Rallye, 4WD and passenger cars.
Semi-Synthetic - Ester based.
Extreme pressure, anti-wear, anti-corrosion and anti-foam.
For all gearboxes and hypoid rear axles without limited slip systems. ??
Suitable for all types of fuel: leaded and unleaded gasoline, gasoil, LPG.
Performance Standards: API GL4 and GL5 / MIL-L-2105D
Very high lubricating power which decreases friction and wear.
Very easy gear shifting. Thermal stability under high temperature.
Unshearable oil film, even under extreme working conditions.

 

You didn't specify the viscosity.
It looks like it could work in the gearbox, not in the diff.

Get something that's been tested for the transmission as well, they don't like being abused.

 

it is 75w-90. so rear diff is limited slip..I will get some redline for it

http://www.motorspot.com/Gear_300_Au...8_%28GB%29.pdf

 

i wanted to put gear 300 but was told i was better with redline stuff...supposed to be smoother

 

Motul is going into gearbox and redline in diff. I will report back.
In my Audi motul worked better than redline

 

Any update on this? I am going to be doing the same thing to my car next Saturday!

 

I hope you aren't referring to a full motul 300v swap:

 

No I wasnt. I am planning on running Redline in the diff and either motul in the tranny or Redline in the tranny. Still doing some research to see which one is better.

 

MOTUL Gear 300 works very well in tranny, I recommend it!

 

Nadrealista..since you have had the motul in the tranny for about a week..how do you like it?

 

 

RX8Soldier, yeah I got that. I wanted to see how well the motul has been holding up in the tranny and if its worth it.

I am looking at the long term effectiveness of the fluid in our tranny's

 

motul works great , i been using it for 1 year, no plroblems !! i used the royal purple for one day but a grinding start , change it the next day to motul the grinding on 5th went away . i been doing races and tracking the car alot over 1 year too..

 

Rx 8speciale, thank you for that input!

 

Great to hear!

Going to be changing my fluids this Saturday!

Looks like Motul makes a LSD rear diff fluid!! We have a bunch in stock at work!