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YOUR RESEARCHTransmission Oil - Any 75-90 synthetic?
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Use extensively in
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Suggestion
I have heard nothing, there was absolutely no change from before I put the Delvac in the transaxle.
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Suggestion
Are there any DIY's posted on how to change the manual transmission oil?
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Suggestion
I read that its recommended to replace the oil every 30,000 miles, so drilling a hole was not too apealing...
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I have heard nothing, there was absolutely no change from before I put the Delvac in the transaxle.
I read up on the previously posted threads on transmission oil, but I was unable to find whether the trans/diff requires a synthetic 75w90 or not. From my understanding, the differential and trans is one contained unit. Will any synthetic gear oil be sufficient...like the
mobil1
synthetic oil found below? Are there any DIY's posted on how to change the manual transmission oil? I only found one for the Auto trans.
Mobil/1 qt. 75W-90 synthetic gear oil (98W573) | Gear Oil | AutoZone.com
________
WEB SHOWS
I did mine a while ago and used
Mobil 1
75-90 synthetic. Its actually easy and straightforward. On the 5 speed manual, I had to purchase a specific 16mm triple-square anti-tamper socket to get drain
plug
out, on the 6 spds I understand its a regular 10 mm hex...
I don't remember if the 6 spd is 10mm or 17 mm hex.
One trick to doing though is there's an aluminum cover in the way of the drain. By the book you need to support the car properly and remove this cover. I understand that alignment can be effected if the support isn't correct. The other method I've seen mentioned is simply drilling a hole in the correct location in the aluminum sheet.
I've not done this yet so can't speak to the ease of either technique.
...yes, you are correct. There where four 15mm bolts (two on each side) if I recall, that hold that cover, then you can slide the cover out, I don't remember any adjustments, they where fixed holes... and I didn't have to remove the wheels or anything...
I read that its recommended to replace the oil every 30,000 miles, so drilling a hole was not too apealing...
It really depends on your wrenching skills...and don't forget the basics...
jack and stands
special tools if needed
oil, catch can
lube pump, etc.
two out of five (five being the hardest)...
I used
Mobil 1
Delvac 75-90. Then I later added two tubes of Moly (MSO2) to the transaxle. I suppose
Mobil 1 synthetic
75-90 will work also, but the Delvac is a heavier-duty product.
You don't have an
LSD
in the diff, do you? I'm asking as I believe that moly and an
LSD
were not to be mixed.
I'm speaking more from experience regarding synchro's in manual trannies and not adding friction reducers (same goes for wet clutches on motorcycles). Maybe that doesn't apply in this case?
On a similar note, the lubricant for the
PDK transmission
and clutch are different. I'll bet the clutch is oil is not as slippery, e.g. like the non-scuffing hypoid oil used in differentials, as compared to the trans-axle oil.
I have done some reading and apparently
Mobil 1
Sythetic Delvac 75w90 (sold by the gallon) gear oil is vastly superior to
Mobil1
75w90 (sold by the quart) Synthetic gear oil.
Apparently the M1 Delvac is factory fill in the in the
GT3
/RS...
Here is the info..
Original fill in 996/997
GT3
/Cup cars, and GT3Rs. Works well in all 901, 915, G50, G96 gearboxes. Used extensively in
Porsche
Motorsport products in every grueling test there can be LeMans, Sebring, Daytona, etc. We also use it in our service department in all street and race cars. Works in cars with or without (
LSD
) limited slip differentials.
Great lube, surpasses all others in research and development.
Mobil
Delvac 75W-90 is a fully synthetic drivetrain lubricant engineered to meet the most demanding extended drain and OEM warranty requirements. These products are designed for use in heavy duty drivetrains that require gear lubricants with excellent load-carrying capability and where extreme pressures and shock loading are expected. The state-of-the-art technology in
Mobil
Delvac 75W-90 delivers unequaled performance for low and high temperature applications, including outstanding oxidation stability, wear protection, corrosion resistance, improved shear stability, extended service capability, and excellent fuel economy.
meets or exceeds the following industry requirements:
API GL-5
API MT-1
SAE J2360
This is NOT the same formula that is available in mass market auto parts stores in quart bottles.
Sold in 1 gallon containers.
________
AlissiaCutie
Only two places I could find that stock this stuff are:
LN Engineering
- $45
Lufteknic - $42.50
Any other places?
________
Washington medical marijuana dispensaries
I was under the impression
Mobil
Delvac gear oil doesn't have friction modifier for LSDs in it. True? That will be better for most of us, but for folks with LSDs keep that in mind.
That doesn't necessarily mean anything. GM, just for example, requires that "friction modifier" fluid is added to the gear oil in their clutch-type LSDs, and for all I know Porsche may have a similar procedure for the GT3.
As Greywolf notes, TBDs are just a bunch of gears, and they don't need friction modifier.
It is also fascinating to go to the Redline site and look at the comparative specs for gear oils, and see the difference in specs for the 75W-90 fluid with and without friction modifier. There are more differences than I expected.
This is a source reference. Confirm exact model applicability in the original material.
