View Poll Results: Best manual transmission gear oil for a 997.2?
Mobil Delvac
0
0%
Mobil 1 PTX
22
84.62%
Motul Gear 300
1
3.85%
Liqui Moly GL5
3
11.54%
Voters: 26. You may not vote on this poll
997.2 Gear Oil
#16
Mobilube PTX is the oil spec'd for these transmissions. It is special for these transmissions which are manufactured in Japan by Aisin.
Like others, I changed my factory fill of PTX for a fresh fill of PTX and it made no difference in the shifting. Installing a Numeric Racing shifter and cables took away the 1-2 grind that would happen when cold, but it can still be tough to get into 1st and 2nd when cold. This is just a known quirk of these transmissions. I read somewhere it is because they use steel synchros for 1st and 2nd for durability purposes - stronger than brass but also harder to shift especially when cold. You can't really fix the issue with an oil change, but an oil change is a good thing to do for the longevity of your transmission.
Like others, I changed my factory fill of PTX for a fresh fill of PTX and it made no difference in the shifting. Installing a Numeric Racing shifter and cables took away the 1-2 grind that would happen when cold, but it can still be tough to get into 1st and 2nd when cold. This is just a known quirk of these transmissions. I read somewhere it is because they use steel synchros for 1st and 2nd for durability purposes - stronger than brass but also harder to shift especially when cold. You can't really fix the issue with an oil change, but an oil change is a good thing to do for the longevity of your transmission.
#17