I feel like an ***, but this is what my local Amsoil dealer told me to use for our trannys. After reading here (should of first) i'm afraid i used the wrong type! I have already put it in and it seems fine, but i can change if it's gonna mess up anything. Tell me what you think??

https://www.amsoil.com/storefront/svg.aspx

 

if this is wrong can i drive on it for a few days 'till i get a chance to change it again? Or should i just drive my other car 'till then? I have only drivin it 5 miles from the dealer to home.

 

Bump

 

That is fine. 75W90 is recommended...

 

Edit: It looks fine, it says it can be used where GL-4 is called for

 

https://my350z.com/forum/showpost.ph...5&postcount=20

 

I probably wouldn't run anything other than what is recommended by Nissan. In the long run it could possibly do harm but for now it should be OK until get time to change it.

 

Thanx! My only real concern is that i read somewhere here that sulfates were bad for synchros. The back of the bottle says something about some type of sulfate hypoid additive. Otherwise it's Amsoil, it's 100% synthetic, and it's the right weight. Which may be a bad way to look at it, but i'll prob change out soon with the GL-4 only fluid from their website.

 

From what I've read about GL-5 it seems as if the corrosion of syncrhos is the biggest concern with factory recommended GL-4 usage. So if you don't care about your synchros go for it.

 

So are you saying GL-4 will corrode or GL-5? Sorry not trying to be a pain. What are the synchros made of anyways?!?!

 

Supposedly GL-5 will, but I have no proof.

 

We use a 50/50 mix of 75-90 and MTL

 

We use this....but the Amsoil will not harm your tranny. http://www.forgedperformance.com/store/home.php?cat=280

 

Thanks!! I'll prob change it soon anyways just for piece of mind. Is there any specific "ingredient" i should be weary of??

 

synchronizers are the little gears that separate the gears allowing you to shift from one gear to the next smoothly. Okay, now I am confused.

Forget my explanation...see this website:

http://auto.howstuffworks.com/transmission.htm

-J

 

So i ask this....am i going to cause any on-going damage/corrosion by allowing that fluid to stay in my tranny for the next week/100 miles or so 'till i can get the correct stuff in???

 

Here's the graphic sky...

Synchronizers
Manual transmissions in modern passenger cars use synchronizers to eliminate the need for double-clutching. A synchro's purpose is to allow the collar and the gear to make frictional contact before the dog teeth make contact. This lets the collar and the gear synchronize their speeds before the teeth need to engage, like this:





The cone on the blue gear fits into the cone-shaped area in the collar, and friction between the cone and the collar synchronize the collar and the gear. The outer portion of the collar then slides so that the dog teeth can engage the gear.

Every manufacturer implements transmissions and synchros in different ways, but this is the general idea.

 

Nissan calls for GL-4 because it uses soft metals(copper) in it's transmissions. Use only GL-4 transmission fluid. If it's GL-5(even though it says it meets or exceeds GL-4), it will screw up your transmission. Nissan has synthetic GL-4 transmission fluid at their dealerships, they'll change your tranny fluid for around $75. That's pretty cheap compared to a transmission, or having your car gone for weeks on end with warranty work.

 

Anything that says it will work in a GL-4 application (such as the oil you have selected) is fine. Don't worry about it.

BTW, it is usually the sulfur in GL-5 oils that screws up the synchros.

 

LMAO...so if GL-5 has sulfur that screws up synchros, then anything that says it will work in GL-4 is not necessarly fine, lol. Since most if not all GL-5 fluids have Sulfates in it. Also i called Amsoil yesterday and the tech basically said to get it outta there asap! So i'll be getting the Amsoil GL-4 stuff put in tomorrow when my rear end clicking is getting fixed. But thanks for all the help!! Hopefully in the 4 days and 40 miles i have not ruined my new tranny!!