AOW162435

Been using the same for nearly 4 years and the transmission is super smooth. I replace it every winter since the car is on stands for months....


Andreas

J.PELLEGRINO

We use the Delvac in most street cars with great success. We also rebuild G50 gearboxes on a regular basis and have not seen any unusual wear on any sacrificial components. We do however install limited slip additive when applicable, that must be why we never have diff. "chatter" issues. We also have a better gear lube that we install in track cars that see very heavy use. It is rather pricey, so many might consider it overkill for your average street car...Just another opinion, Jerry

Duck

Got a shipment of Delvac today and plan on doing the fluid change this weekend. Should be fun.

AOW162435

Super easy. Make sure you can loosen the fill plug before you drain the old molasses out.




Andreas

Metal Guru

Better go and buy yourself a bottle of GM additive to be safe...

Larry Herman

The fact that you could pull up a 30 month old thread like that on another forum has me very worried about you Lewis.

Geoffrey

Don't use that stuff, it isn't the proper lubricant additive for the G50 style gearboxes. It will create the same issue the standard Mobil 1 LS 75w/90 does which is that the gear oil is too slippery (LSD additives) and will cause the syncro to fail to grab the gear and spin it up properly and accelerating wear on both the syncro, gear and dog teeth of the gear. Delvac is probably the most cost effective oil for the G50 gearboxes, especially for a street box.

Metal Guru

If I kept the Delvac in I would have lunched the LSD fairly rapidly, so six of one, half dozen of the other....
What did the factory ship the cars with?

DrJupeman

Strange. I've run Delvac for years and never lunched my LSD. This is in a racing environment, 964 Cup and Turbo 3.6.

(Oh, and your car is not a 965.)

ltc

Photographic memory and insomnia ...

Metal Guru

Says you.......

cobalt

No matter what I use the LSD always makes its noise eventually. Even additives don't last long. They make noise period although some more than others. there are TSB's and lots of info regarding the noise the 20/100 makes at low speed turns and in reverse. Porsche acknowledged it and it is not a wear issue. It is just working. To be honest you should worry when it stops making noise. The 40/40 in my C2 makes no noise as noise is not an issue with these.

BTW the 91's did not all come with an LSD. Although almost all came with option 220. I know of 2 91's that don't have the option code and do not have an LSD. They became standard in 92.

As far as 965, we all can rehash this and know the 965 was supposed to be a car that was never released but there isn't a forum or business that doesn't acknowledge the 964 turbo as a 965. It has become accepted over time. FVD, Cargraphic, tech art and most other shops use 965 as a way of distinguishing the turbo apart from the N/A cars.

Streetfighter

Another option is Swepco 201 that would just as well as Mobil 1 Delvac.

cobalt

I have used the Swepco in my turbo and it does nothing to quiet the LSD.

Metal Guru

Seems like every part that is specifically spec'd to the Turbo starts with 965 vs. 964 so that's good enough for me. Could have been Porsche's internal designation.