Why? Fixed 1st gear jam with new PTX gear oil
04-01-2016, 03:54 PM
#138
RL Community Team
Rennlist Member
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Thanks for the tip. Just bought the 6 quarts from Sunset necessary to do both my 997.1 cars, saving a decent chunk of coin. Thanks a lot.
04-01-2016, 09:37 PM
#140
Originally Posted by lurchphil
SunsetPorscheParts.com $28.23 vs $39.00 per liter for Mobilube PTX at Suncoastparts.com. Heckuva buy!
04-03-2016, 12:57 AM
#141
Three Wheelin'
I just did the swap to PTX- much better than before. I can get into first much better. 900 miles ago I put in the Porsche oil 999 917 546 00 but it was worse than what was in there orginally (with 25K on it). The PTX is way better.
Also did the function first yellow inserts.
Feels so much better! like it should!
Also did the function first yellow inserts.
Feels so much better! like it should!
04-09-2016, 12:59 PM
#142
Rennlist Member
Are you kidding, heck no!! Took out the Joe Gibbs after 1.25 months and put in the PTX. Instantaneous difference!!!! Holy crapola! Whatever this elixir of the gods is made of, unicorn blood, tears from a diety, I have no clue! But it is crazy smooth shifting, only took it out for about 10 miles, but what a difference!!
2009 C2S 86K miles, all year, all weather driver
OK, why? Why did changing my transmission gear oil with Mobilube PTX, as spec'd in my owner's manual, smooth my shifting issue and stop my 1st gear jam? My manual states I don't have to change it until 120K miles.... clearly this is simply wrong, at least for me. The change didn't lessen the frequency or improve it.... it STOPPED it.
I also understand oil does not wear out, per Blackstone's website, so what is going on here?
Background
I have (had) the classic "won't go into 1st gear" jam that was driving me nuts. Others have it... it appears pretty darn common... and while everyone who has the issue has their little tricks to work around it, no one has actually "fixed" the issue.... until now where I found that just changing the fluid for what is spec'd in our owner's manual simply stopped the issue. Why did I choose to change the oil despite the manual stating 120K for the change? This was a "hail Mary" pass.... I had the car at my indy for a control arm change and I had read in other posts that shifting improvements can be had by changing out the oil... so I did.
One technique I found for lessening the jam is make very left, then up shift movements and not move in an arc. Others double clutch..... whatever. Some say to adjust the cables but I found this is useless when I installed my Numeric shifter and better understood the mechanism (the transmission does the clicking, springing etc. and not the cable lengths or shifter itself).
Blackstone's claims that oil does not wear out: http://www.blackstone-labs.com/by-pa...filtration.php
Beware, ask the dealer what they use. My indy could not get me PTX and he gets his Porsche-labeled parts from a local dealership. That dealership told him they only fill with common Delvac, a G5 rated oil for track and GT3 use. My manual states only PTX, a G4.5 rated oil. I ordered 3 liters from Suncoast for $115 including shipping. Some say these oils makes a differences in shift smoothness. PTX should have better performance for those of us who run our cars in cold weather.
My owner's manual states the following: approx. 3.17 quarts / 3.0 liters transmission oil Mobilube PTX Formula A (SAE 75W-90) GL 4.5
Read more here, in particular posts by Luxter and GTGears post #17 for great information: https://rennlist.com/forums/997-foru...ynchros-2.html
So, what is going on here?
Peace
Bruce in Philly
OK, why? Why did changing my transmission gear oil with Mobilube PTX, as spec'd in my owner's manual, smooth my shifting issue and stop my 1st gear jam? My manual states I don't have to change it until 120K miles.... clearly this is simply wrong, at least for me. The change didn't lessen the frequency or improve it.... it STOPPED it.
I also understand oil does not wear out, per Blackstone's website, so what is going on here?
Background
I have (had) the classic "won't go into 1st gear" jam that was driving me nuts. Others have it... it appears pretty darn common... and while everyone who has the issue has their little tricks to work around it, no one has actually "fixed" the issue.... until now where I found that just changing the fluid for what is spec'd in our owner's manual simply stopped the issue. Why did I choose to change the oil despite the manual stating 120K for the change? This was a "hail Mary" pass.... I had the car at my indy for a control arm change and I had read in other posts that shifting improvements can be had by changing out the oil... so I did.
One technique I found for lessening the jam is make very left, then up shift movements and not move in an arc. Others double clutch..... whatever. Some say to adjust the cables but I found this is useless when I installed my Numeric shifter and better understood the mechanism (the transmission does the clicking, springing etc. and not the cable lengths or shifter itself).
Blackstone's claims that oil does not wear out: http://www.blackstone-labs.com/by-pa...filtration.php
Beware, ask the dealer what they use. My indy could not get me PTX and he gets his Porsche-labeled parts from a local dealership. That dealership told him they only fill with common Delvac, a G5 rated oil for track and GT3 use. My manual states only PTX, a G4.5 rated oil. I ordered 3 liters from Suncoast for $115 including shipping. Some say these oils makes a differences in shift smoothness. PTX should have better performance for those of us who run our cars in cold weather.
My owner's manual states the following: approx. 3.17 quarts / 3.0 liters transmission oil Mobilube PTX Formula A (SAE 75W-90) GL 4.5
Read more here, in particular posts by Luxter and GTGears post #17 for great information: https://rennlist.com/forums/997-foru...ynchros-2.html
So, what is going on here?
Peace
Bruce in Philly
04-17-2016, 03:41 AM
#144
Three Wheelin'
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Porsche dealership. Thats what I did in Warsaw, Poland. Some of them might not know about it but it should be in their lists. They even ordered 20 litre (from Mobil only available in 20 L cans) but I only needed 4 and also paid for 4. Perfect
04-17-2016, 09:32 AM
#145
RL Community Team
Rennlist Member
Rennlist Member
Add me to the list. Did both my 997.1 C2Ss yesterday and shifting is improved in mine (but I rarely had the problem) but dramatically improved in my wife's which has about 80,000 miles on it. The stuff works ! Bought it from Sunset Porsche at the lower cost listed by another poster in this thread. It actually arrived in reused M1 0W-40 bottles that they clean out and reuse since they have to buy it in bulk and then break it down to sell it by the liter.
Just a tip, make sure you identify the proper fill hole as there are 2 upper holes on these transmissions with matching drain plugs - the correct one is that which is further forward where the large undertray and the smaller rear undertray meet, not the one up very close to the where the half-shafts connect to the transmission. If the proper fill hole is used, then the car will take about 2.75 L. If the wrong one is used it will take more like 5L and damage the transmission. I had actually mis-identified the holes when I started, and after filling with all 3 Liters, came in to do some research as I knew it shouldn't take more than that from the posts in this thread. Thanks to USMC_DS1's DIY where he shows both the incorrect and correct fill holes, I opened the correct fill hole, let the excess drain out and put the plugs back in.
I also installed one of LN Engineering's Magnetic Oil Drain plugs in the bottom of the transmission as it has the same thread and length as the OEM plug, but a much stronger magnet in it for capturing any circulating debris.
Just a tip, make sure you identify the proper fill hole as there are 2 upper holes on these transmissions with matching drain plugs - the correct one is that which is further forward where the large undertray and the smaller rear undertray meet, not the one up very close to the where the half-shafts connect to the transmission. If the proper fill hole is used, then the car will take about 2.75 L. If the wrong one is used it will take more like 5L and damage the transmission. I had actually mis-identified the holes when I started, and after filling with all 3 Liters, came in to do some research as I knew it shouldn't take more than that from the posts in this thread. Thanks to USMC_DS1's DIY where he shows both the incorrect and correct fill holes, I opened the correct fill hole, let the excess drain out and put the plugs back in.
I also installed one of LN Engineering's Magnetic Oil Drain plugs in the bottom of the transmission as it has the same thread and length as the OEM plug, but a much stronger magnet in it for capturing any circulating debris.
04-17-2016, 12:09 PM
#146
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Will check local dealer and update group cheers
04-17-2016, 02:17 PM
#147
"If the proper fill hole is used, then the car will take about 2.75"
I am glad you mention this because that is right about what my car took when I changed the fluid a few months back. I was mildly concerned when it started coming back out of the fill hole and I still had a good amount of fluid left in my container.
I am glad you mention this because that is right about what my car took when I changed the fluid a few months back. I was mildly concerned when it started coming back out of the fill hole and I still had a good amount of fluid left in my container.
04-17-2016, 04:19 PM
#148
The only place I could find it in Canada was at Pfaff. They only had it in 20 litre containers and they wanted something like $1100.00 for that. I ordered 3 litres from Sunset.
04-17-2016, 05:13 PM
#149
Specific interest in 997.2 needing PTX at low mileage
My 2010 C2S has only 38k Miles. Any chance it really would benefit from an early oil change? It was a Florida car so may have had 36k Miles in hot weather. My sense is that my 1997 993 shifted smoother than this car, which seems strange. Very mild but noticeable resistance on upshifts to 2nd, say, compared to the 993. The occasional resistance going into 1st from neutral.
Charlie
Charlie
04-17-2016, 10:43 PM
#150
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Well, I was skeptical at first but it's crazy!!! The shifts are awesome now when cold, my only gripe was I looked at the pic from suncoast and ordered only (1) because I thought it was a gallon. Should have seen the look on my face when it arrived. I'm at 48k and the shifts were getting hard into 2nd when cold.
This is a must in the manual gearbox. Even at $40/liter it's a bargain
This is a must in the manual gearbox. Even at $40/liter it's a bargain