BruceWard

Greimann said "Torsen specifically recommends a gear oil with extreme pressure additives ( friction modifiers). Redline says that the NS does not contain these. From an engineering standpoint, the torsen has a lot of sliding friction among the hypoid and helical gears. These gears need EP additives for longevity."

and provided these links as a reference

http://torsen.com/general/general_fa...%20rear%20axle

and

http://www.redlineoil.com/redlineoil...ti.htm#75W90NS

So I decided to call Redline to ask them their opinion. I spoke to Dave at Redline who sad that Torsen and Quafe LSD units do not need the friction modifier and that he recommended 75W90NS for them. He explained thaat "A friction modifer would reduce the synchro actions, the synchros need some friction".

I tried to call Torsen, but I think I missed them for the day, I will try them again tomorrow.

Greimann please do not feel I am questioning your statements, I am only hoping for further discussion and to resolve this one way or the other.

Thanks

RajDatta

Bruce, please keep me posted so I know what to fill in my new trans. Also, what was the best price you could find on the redline?
Raj

BruceWard

Raj, I didnt shop around on the red line, I just threw it in with an order to Paragon. It was $7.95 a bottle of 75w90NS, we need three to fill the 2.7L transmission. I also ordered a bottle of red line ATF to replace the power steering fluid which was $7.95 as well.

Greimann

It would be interesting to conference both of those guys in together if possible and see if they come up with a consensus. What is important is the guy at Redline must understand that this is a Torsen type and not a clutch type LSD.

I based my assessment on the statement that the NS does not contain friction modifiers, which I interpret to mean EP additives. Hypoid and worm style gears require EP additives, and these types of gears are in a Torsen. If Redline NS does indeed contain EP additives, but does not contain something extra that they term friction modifier, then I recant.

A conventional gearbox that is separate from the differential has completely different lubrication requirements than a transaxle. The Borg Warner T56 that is found in the Firebird and Camaro are filled with ATF which is basically hydraulic fluid that has no EP additive, but there are no hypoid gears in a T56 either.

BruceWard

Greimann, thanks for all the info. I will spend some more time on the phone tomorrow and report back on what they say. At least with your info I can ask educated questions.

BruceWard

I have spoken to Rick at Torsen and again to Dave at Redline.

Rick informed me that there are no hypoid or worm style gears in the Torsen LSD in a 968. It is a Type 2 Torsen using parallel access similar to a Quafe. Because of this the LSD would not need EP but other parts of the transaxle may.

Then Dave told me that the 75W90NS does contain EP additives but does not contain friction modifiers and confirmed again that it is the correct Red Line product for a 968 with Torsen LSD.

The factory service manual confirms that GL5 transmission oil should be used. It is my understanding that GL5 contains EP additives so we want EP additives.

Greimann, do you have time to confirm this with them? I lack sufficient understanding of all this to do more than listen and take notes. Certainly you would be much more able to debate with them. Both are very friendly and seemed very willing to help.

Greimann

Bruce, it sounds like you have througly uncovered all the facts and indeed it is OK to use the NS in the 968 Torsen LSD. Good work! As a note, it should also be OK to use the regular 75W-90 as well.

The initial snippets of information at the Redline site threw up red flags in my mind because the first sentence of their description of the NS sounded like a cautionary statement to me: "75W90 NS - a GL-5 which does not contain the friction modifiers for limited-slip hypoid differentials". As long as it has EP, you are OK.

Panic over, nothing to see here, move along!

951and944S

BruceWard can you post a contact # for Torsen..?
I have a damaged differential and would like to know if the parts I need for repair are available.

Terry S.

BruceWard

Contacting them was suprisingly simple their website is http://www.torsen.com/ and the phone number is (585) 464-5000. They also list info@torsen.com as a contact email for info on their products.

When I spoke to them on the phone they seemed to be much more familiar with the current products, so I think it might be good to ask your questions via email allowing them to forward it around the organization until they find someone who knows the answer.

Terry, I am planning to be in New Orleans May 17 - 20th with some friends, none of us have been there before, can you reccommend any activities?

User 41221

Hey Bruce, just head down the Bourbon Street and the French Quarter... most folks can figure it out from there... lol

Seriously, aside from drinking and cruising local art/antique/trinket shops in the Quarter (if you can grab a room at the Ramada Inn in the Quarter, I highly recommend it, its a good place, even if the rooms are a bit small), if you have a vehicle and some time, cruising along the gulf out to Mobile/Gulfport is always fun, especially if you like casinos (I think Gulfports are better than the ones in NO), but I always like driving along coastline roads. Others might find it boring.

Regards,

951and944S

BruceWard

What's your visit going to be oriented around...?
Partying...historical sites....cuisine.
I actually live midways between Baton Rouge and New Orleans and head to BR more often than NO particularly around this time of year. Most smart NO area people LEAVE NO during Mardi Gras.....

Post your interest though, I'm sure I can help.

Terry S.

BruceWard

I believe March 17-20 is after Mardi Gras. It is just a group of old friends (co ed) getting together to explore the city. We do not have any specific plans or goals. None of us have been there before. So any suggestions would be great.

951and944S

BruceWard

Well I'm no zoo aficionado but I'm told the Audubon ranks right up there.
There's the Aquarium of the Americas too if you like that sort of thing.
Jackson square is a nice tourist attraction and simply walking the streets, including Bourbon street where you can have some binets and coffee, listen to street musicians etc. There are tons of fine Cajun restaurants and dishes to try (we like it spicy... ).. There are gambling casinos and riverboats, and if you head towards Baton Rouge you can take a spin on a Gambling casino riverboat...... Swamp tours, etc., etc.

Funny, I love Arkansas... I've hiked the Buffalo a few times and those roads (especially scienic 7) around Ponca-Pruitt are a sports car lovers dream if you keep an eye out for elk and deer..... Been to Petit Jean, Mt. Nebo, Little Rock and......just about everywhere up there. I strongly considered moving to Mountain Home and went so far as to make a special trip to view some land there. Funny short story-I left here on a trip to tent out at Mt. Magazine a few years back....very cold even for Louisiana but when I cross the state line in SW Arkansas on Hwy 71 near Texarkana I began to notice it was pretty dark. I didn't realize until I got to Paris (southern approach up Mt. Magazine) when I stopped to change into thermals at a gas staion that all the lights were out EVERYWHERE..!
The lady at the cash register asked if I was sleeping in a tent because all of the hotels were full (since they had lights the locals were booking in) and I replied..."No I came here to sleep in a tent on purpose". I left there, dodging fallen trees etc., made it to within 100ft of the camping parking area when I stopped the car to remove a large fallen limb (in the 944S).
Tires spun when I got back in the car and had to coast backward to make a 180. I came down off that mountain that night and the county was attempting clearing with a road grader. I stopped to ask a county employee if the road from the north was clear and he says. "I would never have expected a 4-wheel drive to come off that mountain tonight, and you just came from there in *that* sports car...?" He told me to come back in the summer.....

Anyways, it was stated here on my local news that it was the worst freeze in Arkansas history and that some people wouldn't have power restored for months. First time I ever experienced a "freezing fog".....

Take care,

Terry S.

Tom Pultz

FWIW I've been using Red Line 75W90NS in my 944 S2 trans equipped with a Guard Transmission torque sensing differential. No problems after several years.