PorscheLars

Sorry for poor language.

I have bougt the Redline heavy duty Gear oil after 2 gone gearboxses. (the last gearbox got a leak in a seeling). A friend ment he had some old documention for the friction reduction addtitives in this oil who was not so good for all the metalls in the gearbox.

I have read on the redline WWW page, and they clame that this oil is good for the S.rings.. Is there any precations to use this oil? Anything?

(otherways i have only heard positive things about the oil, bot none who have used this for street cars over several years (the car have 6 mht in the garage each year)

Best regards Lars

Sam Lin

Which specific Redline are you referring to?

Sam

PorscheLars

Heavy ShockProof™

Sam Lin

I run Heavy Shockproof in all my transmissions, sometimes mixed 50/50 with 75w90NS.

The friction modifier your friend probably read about is for LSD clutch-plates. On a new clutch-type LSD I would run 75w90.

Sam

PorscheLars

thanx

But he did not ment the LSD but some other parts. I read that Redline says the oil is good for the syncro rings.. so what should i be? .. hmm .. anyway I cange mya gearoil yesterday and had only 4000km on the oil on a brand new gearbox (1988 Silber Rose spec). The oil was much "dirtyer" than I ever would think. Much track days and autoslalom. Off corse the gearbox have to brake in as well but I was suprised.

I have LSD.. should I not drive the Friction modded Redline Heavy ShockProof™ oil?

Lars

Sam Lin

On used LSDs I run Heavy Shockproof and 75w90NS 50/50.

There are debates whether GL4 or GL5 oil should be used in our transmissions due to synchro material compatibility, that may be what he's seeing. I'd run it - I do run it.

Sam

PorscheLars

The "old" spec from stutgart says Hypoid oil SAE 80 MIL L2105, API classGL4 !?

Sam Lin

Yes, and later specs said GL5 - that's why there's a debate. I don't worry about it.

Sam

PorscheLars

OK thanx, I other friend of mine start to get Noises from the Gearbox. I told him about the Heavy Shockproof Redline Oil and he tryed it. Run it the hole summer. Also Nurnberg ring (He have a video of it on the Internett. I know a lot of rennlistere have seen him drive in the silber rose to the limit all the way around) but the experiene from him is that the nois went lower and is stabil for now.

I wil use the Redline until I hear / learn somting else. Was just qurious abot yours eqperiecnce.

Thanx alot for the ansver Sam

:-)