Where can I buy quality fluids for my own changes and not pay stealership prices?
Tranny: Delvac or Shell ? Others?
Coolant: Audi? Off the shelf fluids?
I've been searching for a bit, but not a lot of talk on off-the-shelf fluids...

 

Gear Oil's

GT Gears
We recommend that you use one of three oils.
1. Mobil1 Delvac
2. Shell transaxles under the Porsche part number from the dealer.
3. Lubrication Engineers

Kevin (UMW) - only Delvac

My mechanic who races cup cars swears by Royal Purple.

I use Delvac.

Coolant
http://www.renntech.org/forums/index...ifrezecoolant/

 

I had a heck of a time finding the Delvac:

Need two of them: Mobil Delvac 75W-90 gear lube (1 gallon) about 1.4 to fill mine
http://www.lufteknic.com

 

Anyone with experience with anything besides M1?

 

Matt at GTGears is a great resource.

Matt Monson
Guard Transmission LLC
303-530-1094
gtgears@yahoo.com

https://www.6speedonline.com/forums/member.php?u=40410

 

any special tools needed to fill/flush the trans?

 

A lift . . ..

I did it on jack stands

 

And what tvurt said...

 

Thanks for the diagram. On a side note - has anyone changed front & rear diff fluid? I believe it uses the same 75W-90 stuff.

 

I just looked for a Mobil distributor in my area. They were a wholesale distributor but sold me the Delvac they had in stock. The only catch is I had to purchase a case or four gallons.

A local to me independent shop had the Shell in a 55 and would sell it to me if I came in with a container.

 

I just ordered Mobil 1 from these guys. I believe they have it in stock. It was a 100$ shipped for 2 Gallons.

Pelican also has the 75W-90 Red Line fluid

 

Thanks for the kind words fdorn. It's appreciated.

One comment on this subject. This is one of those instances where you've got to be careful of the context of the comment and be sure you are hearing what you think you are hearing.

Cup Cars don't have synchros in them. They are dog boxes. So their needs are different than the needs of your TT. And beyond that, when we start getting into the synchronized gearboxes some of them have steel synchros and some of them have brass synchros.

The oils listed above that I suggested can be used with good success in pretty much ANY Porsche/Getrag Borg-Warner style synchronized gearbox or a dogbox. I do not universally suggest people use Royal Purple or Redline because of certain circumstances where I have found those oils to be problematic. Those circumstances are for a synchronized gearbox, with brass synchros that is driven on the track. That exact configuration I have found to have shifting issues once the gear oil gets up to "race" temperature and loses a bit of it's viscosity.

A lot of Cup Car teams swear by those two oils. A lot of street car guys love what it does for them on their 1st and 2nd gear shifts when it's cold out or the car isn't warmed up. And my customers who have installed steel motorsports synchros into their boxes like those oils as well and have no complaints.

So take that for what it's worth. If it's a street car and you change your oil often enough the reality is any oil that is mentioned in this thread will be just fine. If you track the car then you want to start looking at specifics a bit more closely. I know some racers who run 75/90 during one part of the season and 75/120 when it's hotter. But that's really irrelevant on the street. Change it once every two years for a street car, and once a year if you do a couple of track days and your gearbox will last a long time and be happy.

 

Very useful info here..Thanks.
+rep for you.

 

Which LE oil do you recommend ?

 

Matt - as usual - thanks for clarifying. Makes perfect sense now.