Changed MT fluid to Redline
 

Changed to Redline MT-90 (GL4, 75w90). Like others have noticed, there is a huge improvement in shifting afterwards.

Sorry- wrong section, I know. I can't figure out how to move it.

Can you be more descriptive? I've been thinking about doing this.

I put MT-90 in my lotus (notorious for horrible shifting) and it literally felt like I had a different car. the shifting was suddenly smooth as could be. I was blown away by the improvement.

:iagree:

I love Redline gearbox oil, the best I've ever experienced.

I am going to have to order some and take care of it at my next oil change.

Is there any need to wait x miles before changing the MT fluid like the engine oil? How often does the stock MT fluid need to be replaced vs a synthetic?

How much would a shop usually charge for flushing/refilling if I provide the fluid?

+1 on the Redline fluid. I did the tranny and rear diff fluid swap at my 30k mile service. The car definitely shifts smoother.

im thinking about doing this on my G. it's a notchy gearbox from the getgo. the Z, not so much...to me it's pretty smooth. not toggle switch smooth like my honda's gearbox but smooth enough.

I may also have to try this. As noted the 370 has decent shifting but coming from a Honda it just doesn't have that smooth snick action.

I did two DIYs in the DIY section on tranny and rear diff oil changes. I put the appropriate Redline products in each. I did the rear diff first but didn't notice any difference really (not sure I would really notice anything). The rear diff oil was NASTY, so that alone made the change worth it. After I changed the tranny oil (which looked pristine), the car shifts much much smoother. With a cold start, it shifted like a warm transmission instead of the clunky, stiff shifts you normally get before the car warms up. Definitely worth changing out both oils. I did it at 3k miles. Changed the motor oil to Redline at 5k.

http://www.the370z.com/diy-section-d...il-change.html
http://www.the370z.com/diy-section-d...il-change.html

Will probably do this at my next oil change, which will be around 12,000 miles (currently at 10,000).

Sure, here are the main differences upon the change to Redline MT-90 in the 6MT gearbox that I have noticed so far:

- easier gear engaging when cold, esp. 2nd gear
- smoother downshifts
- gearbox whine seems to be slightly quieter than before (not significant- could be caused by other factors).

Haven't tested under high RPM shifting yet, but in my other car, it seems to engage better with the Redline fluid.

Im in for a Group Buy...

Group buy for oil, MT fluid, all of the above?

I'd be in for the GB

I'm in for GB. I need diff, trans and engine oil.

I'm interesting in a GB!

Interested in the GB! (motor/trans/diff)

I got a question:

I read some where that Redline MT90 might not be good for the transmission synros. The gear box might be smooth but oil doesn't protect the synros as good as original trans oil. (I could be wrong).

My story:

I had a VW vr6 back then and I changed the oil to MT90 at around 90K km and when the car was at 140K km the transmission failed (grinny, tran oil leaking...). Not sure if it was the oil but VW tranny should last more than 140K.

Anyone?

Not sure about the manual tranny because I have the AT, but the owner's manual hints that the diff fluid must be the Nissan stuff specified or risk voiding the warranty on the rear diff. Anyone read this like I do?

I believe people are feeling better shifting is because Redline oils are thinner than the stock oil. Stock oil needs more time to warm-up than Redline.

But the question is, does Redline oil protects just as well as the stock oil or better??

I'am using 50% virgin olive oil and 50% peanut oil and what a difference!Soooooo much smoother!

Here we go again with Nissan oil being mysteriously superior to other products. The Redline oils that we're using to replace the OEM oil have the same viscocity ratings as the stock crap. Fluids with the same viscocity have the same resistance to flow/shear aka 'thickness'.

Finally, how is the 18 year old Nissan technician going to know that the black sludge coming from my rear diff is Redline or Nissan OEM oil? No way will they be able to tell the difference.

We can beat this to death the same as the engine oil!As long as you are happy useing a good quality oil in the diff,engine,or trans you will be fine.Enjoy the car and move on.

i would probably be interested in a group buy. could u pm me an approximate price for all of the oils

Interested as well, PM me! Just the motor oil though..

interested in group buy, motor, tran, and diff oil all at once!

we don't do the whole pm for price thing guys, we simply post it

we'll work out some details tomorrow and post in our vendor classified section for those interested

z

It would be nice to get it quicker, and maybe even get a little bit of a discount. :):hello:

It should be similar viscosity. The manual recommends a 75W-85. The MT-90 is a 75-90 which is actually a bit thicker but not by much at all. Both the Nissan and Redline MT-90 manual trans fluid are GL-4.

Some people (including me) mix 2 qts of MTL and 2 qts MT-90 to get the right viscosity.
Nissan actually does say that you can use 75W-85 or 75W-90 in the manual transmission
(I think the 350Z used only 75W-85).

Im in for Redline MT oil. Shifting into 2nd is always notchy when cold and this trans in general could shift a bit smoother...sounds like this fluid might do the trick.

+1 on Group buy for redline oil 5w30!!

I am in as well. Currently I get my Red Line from Jegs at $9.99 qt with free 2 day shipping. They charge a $9.99 handling charge per order but that is a lot cheaper than the shipping would be so it works out. Make me a better deal :tup:

if you guys can let me know how much of each people want, that will make this alot easier - we have alot of this stuff available, and there are alot of different products. This way I dont waste alot of time working out GB pricing on things no one is going to buy :)

if the group buy is going on then I would take
atleast 6 quart of the engine oil 5w30
3 quart of the transmission and 3 quart of the rear diff (or whatever the recommended amount is)

3 gallons of 0W-40 Motor Oil (2 oil changes worth)
4 quarts (or 1 gallon) of 75W90 GL-5 Gear oil (2 changes worth for the diff)
3 quarts of MT-90 75W90 GL-4 Gear Oil (1 change worth for the trans)