Which Transmission/Differential Oil for 996 TT ?

[tagger]

I was going to have my Manual transmission /Front differential fluid changed . The car only has 15k miles but it is a 2002 and I am always ahead on fluid cahnges. My mechanic is prepared to do it for me as long as I provide the fluids. Short of buying directly from Porsche dealership ...can anybody advise as to what is the original factory fill fluid, is it a special Porsche formulation or can I buy it without the Porsche branding?

Would it be better to use an alternative product? The car is predominantly driven on the street in very high ambient temperatures .I see alot of guys mentioning Redline products.

Thanks for your suggestions.

[Loren]

Start here.

[chaser]

I can't find Mobil Mobilube PTX (75W-90) online at all my usual dealers. Anyone have a source or link they could provide.

[alex_55]

I can't find Mobil Mobilube PTX (75W-90) online at all my usual dealers. Anyone have a source or link they could provide.

i have the same problem ! :(

[Loren]

Use the Mobil 1 synthetic 75W-90 or the Shell. The Shell is easier to find for some folks.

[Chuck Jones]

I just coincidentally ordered and received the Mobil75-90 Delvac synthetic gear oil from Lufteknic out of Richmond VA. I had to do a lot of looking to find someone who carried it.

I had a discussion with Kevin at Imagine Auto and he was adamant about getting the Delvac and not just the AutoZone or Kragan's Mobil brands...so I ordered two gallons. They charged me $42.50 per gallon and $11.00 shipping. I bought more than I'll need so that I might be able to provide some to at least one other person....if you want to order their info is posted below. I'm going to change out the transmission fluid as well as the front differential on the TT.

The company name and address is as follows:

Lufteknic

1529 Brook Rd.

Richmond, VA, 23220

Website: www.lufteknic.com

Edited May 14, 2008 by Chuck Jones

[killerbee]

This is the lube you are referring to http://www.mobil.com/USA-English/Lubes/PDS...-90_80W-140.asp. It is a real pain in the behind to find but one way is to use this page on the mobil web site http://www.host.exxonmobil.com/channelpart...r_directory.jsp A couple of phone calls and you can track it down rather easily. Pricing is usually better since you usually end up dealing with a distributor I got it for 26 a gallon but had to drive 17 miles to get it.

[Chuck Jones]

OUCH!!! I literally paid twice the amount you did .....$26 a gallon? I despondent....depressed.....done in.....I could have bought four gallons for what I ended up paying.... Sacka-Hachi!! I'm going to go hide all the razor blades....

[SXN]

Do you use 75w 90 for both the tranny and diff?

[Chuck Jones]

Yes...for both the tranny and the front differential.

FYI....I found a Northern California distributor for the Delvac in the town of Ceres CA....which is off Hwy 99 about an hours drive from Sacramento. If there is enough interest in this DIY...I would be happy to make the trip to Ceres and pick up a few gallons to be dispersed to the folks who would like to do the tranny fluid changeout.

I obviously won't be driving my one-ton Dually Dodge to get it though!! I can't believe the cost of diesel fuel these days.

[alex_55]

what ???

for the tiptronic you should put ATF ! or i made a big mistake ? and for the diff 75w90...

[RFM]

alex 55

They have MANUAL transmissions. ;)

[alex_55]

alex 55

They have MANUAL transmissions. ;)

RFM, is good that i put ATF form MOTUL in my car ??? i am very scared now :(

[RFM]

You got a tiptronic i understood from previous postings, ATF is the one you need than. I don't no if MOTUL is on the list.

[SXN]

I can't get mobilube here.. can I use amsoil?

has anyone tried it?

[Dave at Red Line]

I was going to have my Manual transmission /Front differential fluid changed . The car only has 15k miles but it is a 2002 and I am always ahead on fluid cahnges. My mechanic is prepared to do it for me as long as I provide the fluids. Short of buying directly from Porsche dealership ...can anybody advise as to what is the original factory fill fluid, is it a special Porsche formulation or can I buy it without the Porsche branding?

Would it be better to use an alternative product? The car is predominantly driven on the street in very high ambient temperatures .I see alot of guys mentioning Redline products.

Thanks for your suggestions.

In the 996 as well as most Porsche manual transaxles we recommend the 75W90NS, a suitable replacement for the PTX fluid. The NS contains No Slippery additives so isn't too slippery for the synchros, a problem with most gear oils. In the front differential I would recommend the 75W90, it contains a friction modifier, beneficial to the separate differential operation.

Regards, Dave

Red Line

Edited June 11, 2008 by Dave at Red Line

[BillTurbo]

I was going to have my Manual transmission /Front differential fluid changed . The car only has 15k miles but it is a 2002 and I am always ahead on fluid cahnges. My mechanic is prepared to do it for me as long as I provide the fluids. Short of buying directly from Porsche dealership ...can anybody advise as to what is the original factory fill fluid, is it a special Porsche formulation or can I buy it without the Porsche branding?

Would it be better to use an alternative product? The car is predominantly driven on the street in very high ambient temperatures .I see alot of guys mentioning Redline products.

Thanks for your suggestions.

In the 996 as well as most Porsche manual transaxles we recommend the 75W90NS, a suitable replacement for the PTX fluid. The NS contains No Slippery additives so isn't too slippery for the synchros, a problem with most gear oils. In the front differential I would recommend the 75W90, it contains a friction modifier, beneficial to the separate differential operation.

Regards, Dave

Red Line

[george996]

I was going to have my Manual transmission /Front differential fluid changed . The car only has 15k miles but it is a 2002 and I am always ahead on fluid cahnges. My mechanic is prepared to do it for me as long as I provide the fluids. Short of buying directly from Porsche dealership ...can anybody advise as to what is the original factory fill fluid, is it a special Porsche formulation or can I buy it without the Porsche branding?

Would it be better to use an alternative product? The car is predominantly driven on the street in very high ambient temperatures .I see alot of guys mentioning Redline products.

Thanks for your suggestions.

i have first hand experience with the Mobil 1 synthetic and the factory fluid. please see attached Rennlist link.

http://forums.rennlist.com/rennforums/996-...nual-996-a.html

[Danyol]

Chuck, You weren't the only one. Here's my fill method.

OUCH!!! I literally paid twice the amount you did .....$26 a gallon? I despondent....depressed.....done in.....I could have bought four gallons for what I ended up paying.... Sacka-Hachi!! I'm going to go hide all the razor blades....

Edited March 28, 2009 by Danyol

[phillipj]

how do you re fill the fluid?

[Loren]

how do you re fill the fluid?

Buy a hand pump at your local automotive store - just a few dollars.

[Danyol]

I just pressurized the container to about 10 psi & used a 3/8" tube though a tight fiting hole in the cap,. Used it for the tranny and diff. (picture 2 posts previous)

Chuck, You weren't the only one. Here's my fill method.

OUCH!!! I literally paid twice the amount you did .....$26 a gallon? I despondent....depressed.....done in.....I could have bought four gallons for what I ended up paying.... Sacka-Hachi!! I'm going to go hide all the razor blades....

Edited March 29, 2009 by Danyol

[Chuck Jones]

Dan: from your picture...are you introducing the pressure to the container thru an air needle like you'd use to fill a football? Doesn't it come out when you start pressurizing the container? I can't really see what you're using to pressurize the container....but the tube thru the lid on the top would go to the bottom of the container to pick up the oil. You simply come off the trigger to stop the air pressure when it starts to flow out the fill hole.

Since I just turned 68 and have a bit of trouble crawling under the car on jackstands....I've invented a $20 bill that I give my indy to use his lift to change it out for me if I supply the Delvac.

[Danyol]

Exactly; the needle doesn't come out at the low pressures (small cross section 10 psi). I would puncture a small hole first as the football needle will bend before puncturing the plastic. For the cap, drill a hole slightly smaller than the tube, oil up tube and slide it in. Tube with a 1/4 - 3/8" bore works well with the high viscosity fluid.

Be careful not to over-pressurize; you know what will happen & it won't be pretty :huh:

Dan: from your picture...are you introducing the pressure to the container thru an air needle like you'd use to fill a football? Doesn't it come out when you start pressurizing the container? I can't really see what you're using to pressurize the container....but the tube thru the lid on the top would go to the bottom of the container to pick up the oil. You simply come off the trigger to stop the air pressure when it starts to flow out the fill hole.

Since I just turned 68 and have a bit of trouble crawling under the car on jackstands....I've invented a $20 bill that I give my indy to use his lift to change it out for me if I supply the Delvac.

Edited April 4, 2009 by Danyol