questions to all
What are the good recommendations for tranny fluid in an 87s4 AUTO?
Brand ..type etc etc
Also ..when i have my tranny tipped on end as i work on it, small amounts
of
oil leak from the black cap on on the top of the AFT section of the final
drive area. I ASSUME THAT THIS IS THE OIL USED IN THE FINAL DRIVE
CASE/GEARS.
Question is...since I've lost a bit of the oil, i plan on draining all this
as well and putting new stuff in.....same question as above.
What type of gear oil do you all recommend in the fanial drive
case/gears??
Also any do's and don'ts in servicing the oil in this area?
Thanks...i feel like i should be paying some of you by the hour!!! haha
(I said feel...not that i will : ) OK!
Tony
===============
Hi
Tony,
I just put Mobile 1 75w90 oil in my differential. I am amazed at the
difference. I highly recommend it.
Calvin
==============
hey all
Quick question... before i head to the library for another dizzy...vertigo
inducing Microfiche session.
On the Final drive case i assume the two plugs for the diff.fluid are the
ones with the appx 10mm allen key fittings on them. The one under being
the
drain... the one the back being the fill hole (has "AUTOMAT" and
an arrow
towards the hole).
I'm aware of the diffs fluid capacity (per the manual) but to fill you just
pour/funnel the oil into the upper hole until the capacity is met or the oil
flows out??
Tony
===============
Tony,
> On the Final drive case i assume the two plugs for the diff.fluid are the ones with the appx 10mm allen key fittings on them. The one under
being
the
> drain... the one the back being the fill hole (has
"AUTOMAT" and an arrow towards the hole).
Yep.
>
> I'm aware of the diffs fluid capacity (per the manual) but to fill you just pour/funnel the oil into the upper hole until the capacity is met or the
oil flows out??
Yep. I used 75w90 Valvoline Synthetic and a couple of tubes of diff.
additive. Pouring it in there was the challenge. Hint: With the
driver
side tire off, run a hose from automat hole to a funnel. This allows the
funnel to be higher the hole. Put a catch basin under the diff and wait
for
the fluid to overfill.
HTH
Kevin
P.S., The diff fluid is the most foul smelling stuff on earth. So try not
getting soaked with it. (Don't ask.)
===========
At 01:19 AM 6/9/2003, BrianG wrote:
>Having just finished the timing-belt project, including the tensioner re-build, I just read that I should have used regular engine oil for the tensioner. As per the usual souces, I did the tensioner re-build with heavy-weight oil recommended. Should a guy purge the tensioner with regular oil?
I doubt that it makes much difference, especially in the later cars with
the fill/bleed nipples. It didn't seem to be important enough for Porsche
to change the Factory Workshop Manuals, even though they issued a Tech
Bulletin recommending engine oil for the later cars. It perhaps isn't common knowledge that there isn't as much difference in
the viscosities of gear oil and engine oil as the numbers would
suggest. The SAE viscosity numbering system adds 40 to the viscosity of
gear oil to help distinguish it from engine oil. In other words, SAE 80
gear oil is the same viscosity as SAE 40 engine oil. The additive packages don't make a lot of difference in this particular
application. The gear oils have EP (Extreme Pressure) wear additives, the
engine oils have other additives to make it suitable for engine use.
Wally Plumley
928 Specialists
=====
Just to make you aware: the S4 and GT use 3.0L gear oil in the transmission, this changed in February 1991 model, where it was reduced to 2,3L oil. This should be measured as follows:
Have the car stand on a horizontal surface. The oil level should be 27 mm under the filler opening. How to measure? Finger in the hole ... (no joke)
***One important tip: the two hex key plugs in the final drive (to flush and to fill the final drive) can be very tight. Use good tools to undo them. First do the filler plug !!! This is very important. If you don't you may end up purging the oil from the final drive but not able to fill it again when the upper plug is stuck tight. You won't be able to drive the car anymore until you have it out.
regards Theo
1992 928GTS midnight blue