floatingkiwi

So, swepco 201 was in the car, but that is not readily available here in NZ. I am now using Penrite semi-syth transgear 75W-90 with the correct properties and ratings, but am finding increased wear on the ring and pinion. Castrol products? Mineral only? Also my torsen diff seems to be sensitive to friction modifiers and wont work with lsd additive oils.
Thoughts?

Noahs944

Lucas 75w90 syn is what I use because lack of swepco availability here. Seems great once warmed up.

Vincent C.

Redline 75-90NS GL-5

951and944S

Paragon Products has SwepCo and I'm pretty sure they ship internationally.

T

wildcat077

Do you guys have Mobil / Exxon products down there ?

I use the Mobil 75W90 synthetic in both my G50 911 and my 944 race car with LSD , at least ten years with
the 911 and five with the 944 without issues .

floatingkiwi

Trying to find them.... Delvac or LS for you?

wildcat077

fejjj

Oddjob

Years ago I used Mobil 1 in a 944S that had a Quaife TBD, without any problem that I was aware of. With clutch-type LSDs I used to use Mobil 1, and in recent years a lot of Amsoil. Had problems with Redline being too slippery for the synchros to grab.

mj951

Do you remember which Redline product you were using?
I just filled my '89 turbo transmission w/LSD using their MT-90.
I've only driven a few hundred street miles but haven't noticed any issues.
Probably need to be on a track to notice but could you describe what to watch / feel for? Thanks.

Vincent C.

Oddjob

I had been using Amsoil series 2000 racing fluids, but then those were discontinued. So went with a mix of MTL and 75-90NS, based on the recommendation of a local Porsche track-prep shop. Symptom was hard down shifts, synchros weren't grabbing well. Really struggled to get down into 2nd at T5 Road America. A lot of grinding, and broke a spring retainer on a Cup clutch disc related to the excessive shifting effort. Went back to Amsoil, now called Severe Gear and no longer green, but works fine down shifting in the same trans (951S AOR w/ factory ZF LSD and standard synchros).

Maybe the straight 75-90NS would have worked better for the synchros in my trans, than the mix - I didn't question the recommendation and just went back to the Amsoil product.

Which Firehawk team were you associated with - Hawkins, KMR, Sandridge, other?

wildcat077

Jim,

I joined the Amsoil prefered customer program before the season when i switched to their 15w50 Dominator racing oil , you get a pretty good discount and free shipping to your door.
Might give their gear oil a try when my Mobil runs out, seems it has good feedback !

Vincent C.

I was the mechanic on the car once at the track and then during the race i would jack the car up and help with tires and brakes when needed for Hawk Motorsports.....

Vincent C.