mine is non g85 but i plan on installing a lsd when i do my tranny

 

This one has the limited slip additive.
http://store.summitracing.com/partde...5&autoview=sku

 

Yes Redline is a brand RedLineOil.com

75w90 NS is designed for transmissions and transaxles.
The reason it says its for "non limitied slip" applications is because there is a version of this oil(plain 75w90) that has limited slip rear friction modifiers in it.

You DONT want that one.

Make sure you use the 75w90NS EVEN if you have G85, the G85 diff is a geared unit and doesnt need friction modifiers.

If you put regular Redline 75w90 or any 75w90 that has limited slip additives in it youll shift like **** and potentially ruin your blocker rings in the synchros.


You want THIS>>>http://www.redlineoil.com/products_g...5&categoryID=6

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I just looked at the Royal Purple stuff, I dont think I would use that it, it has the additives I was talking about for clutch type limited slips, thats bad for the F35. They however recommend it for all manual transmissions that call for a GL5 75w90. I'd go with Redline unless youre a diehard RP fan

 

and maven u suggest redline?

 

Yes. The RP has limited slip additives, Mobil1 has limited slip additives, Valvoline Synpower has them, etc.... If you were in a bind I am fairly sure that Pennzoil Synthetic GL5 is additive free and should be available at more places. Also iirc there is a german Shell GL5 called Getrielob or somerthing. The only other lube Ive used and appears to have no additives is Motul 300 75w90 GL5. But its more expensive and harder to find. J

 

so limited slip additives = no bueno

 

Check this one out:

Synthetic Manual Transmission and Transaxle Gear Lube

 

CORRECTAMUNDO

 

so maven, is it so bad that i used the synchromesh? u recommend changing it asap or can i live with that for a lil while?

 

The F35 was originally filled with a 5w30 synchromesh fluid back when it was first put into the Saabs. GM switched to 75-90 because of transmission problems which mainly included poor shifting. Once they starting using 75-90 the shift problems were resolved.

Will the synchromesh fluid destroy the transmission immediately... probably not. I would change it when possible though, just to avoid any unpleasant suprises.

 

I have used the RedLine MT90 and RedLine Heavy Shockproof as well. Depends in what kind of shape the trans is in. Mine saw a lot of track days and abuse, was probably on it's last limb. The Heavy Shockproof helped a lot with the noises. We put MT90 in DJT's car for obvious reasons and he loves that too.

But for your average DD person, the regular RedLine stuff Maven suggested is great. I would highly recommend the RedLine brand.

Someone accidentally put ATF fluid in my trans before after a clutch install. All I can say is get that **** out asap. I am pretty sure that is when my trans damages occurred.

 

that's not very comforting, i'm going to change right now.

 

Changing the manual trans fluid is pretty easy, so I would just change it.

 

Synchromesh was decent fluid, years ago. Even back in its hayday it wasnt the top of the line, so now when tolerqances are tighter and fluids are specifically engineered for unique purposes its even more important to use proper high quality stuff. And in the end, even if you decided to go with the expensive stuff youre still only looking at $30 worth of fluid, and that can last you 20,000 miles easy. (forever if you actually follow the recommendations)

 

use royal purple max gear its 75w-90 and gl4 and gl5 approved just put some in last night

 

I didnt mention Amsoil because they arent clear as to whether or not their oils are ideal for transmissions and non limitied slip diffs. They instead say:
This makes me think that it may not be ideal for the F35.

RP is only GL5 approved for hypoid differential applications.
And of course theres this:
This is exactly what you want to avoid in a GL5 for the F35. Friction modifiers and synchronizers dont get along very well. You want to try and avoid them if at all possible. Also anything that lists "moly" , "WS2" or particularly "MoS2" (molybdenum disulfide)

 

wow, the way the debate keeps going on, glad I just went with the Saturn stuff..... and what really blew my mind was I first went to a Chevy dealership with the part number and he went to his lil ol computer and said there wasn't a dealership in the city of Memphis showing any in stock. So I went to Saturn and he found it, but there was only one dealership that had it in stock...... boils down to: I had to go to 3 different places to find transsmission fluid.

Of course I don't know why I was surprised, I had to go to 4 to have my stage 2 installed, cuz the first place wanted to charge me $675. No dealership around had ever done the install before and apparently their techs were scared little pansies.

 

thanx maven. one last question, is there much difference between the heavy shockproof and the NS? seing it may differ from car to car, for example, i have roughly 50k miles on the tranny and i do abuse it from time to time goin ***** out into open road and live in a city where stop n go is a way of life, but i've never been to the track.
for a dollar more i would just like to know if the shockproof would be worth it in terms of longevity and also in regards to how i drive my car.

 

Yeah the Shockproof is a totally different animal. Its primarily designed for racing transmissions that dont use synchronizers. If you go to the site they probably talk about having solids or particulate lubricant suspended in the oil, this goes back to the friction modifiers I was talking about. Shockproof is very slippery, and we want to use a less slppery oil so the synchros work better. I dont know exactly what Redline uses in the Shockproof to make it shock prroof(what the particulate solids are) but its probably a safe bet that its some sort of dry flim lubricant( this is what those bad disulfides I mentioned are) If youre interested in usi ng Shockproof Id call Redline and see what they say as far as street use in a car with synchros. Theyll probably tell you to use NS. If youre concerned about longevity just change the oil every 10-20k miles, cheap insurance.

 

thanx, i'll be going with NS. i just wanted to better understand everything i read on their site and you did a great job explaining what those additives mean and do.

 

I just finished up a dialog with an Opel engineer who assured me that all F35 transmissions are GL4 75w90. To be more specific, they use a full synthetic GL4 Castrol 75w-90.

 

Yes, I know they use Casrol fluid. Its Castrol 0063 for the 05-07, which is 75w90, and while they may use or call it GL4 in Europe for Opel, here its widely accepted that GL5 is the preferred fill. Many GL5s meet/exceed GL4 specs, 75w90 GL4 isnt any easier to find either so its really a moot point. Not to mention that GL5 is the better choice for higher speed operation.

08/09 TCs actually use a different fluid, Castrol 0402, a 75w85 ,which is a GL4 fluid, but in its absence a non friction modified GL5 is the best choice.

 

i dont understand which to buy some one post a link to a product that is best

 

hhhhmmmm....interesting

 

spec 2+ clutch and flywheel... what fluid guys???