Tranny Oil Condition
03-23-2012, 11:35 PM
#33
Nordschleife Master
BTW, I know that this is going to be met with some unhappy faces, but one of the realities of how you guys chose to use your cars is accelerated wear and tear. While I would expect a street driven GT3 to go 10 years between gearbox rebuilds, I would only expect yours to go 2-3 years with a bunch of track days on them. Synchros and bearings are not indestructible and while you guys are probably running 8/10ths of what a race car would run, you're also probably stressing it 300% more than a street car would be stressed.
People always balk when I advise them that if they are going to put in one of our super short 3rd gears that they need to time them and be ready to go back in there and replace it in 30 or 40 hours. The response is usually, "But I only DE my car." Doesn't matter. Track time is track time and 5000mi with an average speed of 90mph is 55.5 hours. If it was my personal car, I would be budgetting to go in and refresh the thing every 60 hours at a maximum and more often if you regear it or run a short ratio ring and pinion. Let's not forget that the short ratio ring and pinion makes every single gear spin more rotations per hour of use. It is a wear accelerator on everything and not just a service item all by itself. You do have to pay to play this game of fools...
People always balk when I advise them that if they are going to put in one of our super short 3rd gears that they need to time them and be ready to go back in there and replace it in 30 or 40 hours. The response is usually, "But I only DE my car." Doesn't matter. Track time is track time and 5000mi with an average speed of 90mph is 55.5 hours. If it was my personal car, I would be budgetting to go in and refresh the thing every 60 hours at a maximum and more often if you regear it or run a short ratio ring and pinion. Let's not forget that the short ratio ring and pinion makes every single gear spin more rotations per hour of use. It is a wear accelerator on everything and not just a service item all by itself. You do have to pay to play this game of fools...
03-24-2012, 11:50 PM
#34
Rennlist Member
My car has 17K miles and about 120 track hours and the 3-2 shift is crunching sometimes when I drive to work. I don't use 2nd at the track much, so maybe not the synchro? All other gear changes are fine with the 4.0 clutch and pp.
03-25-2012, 01:57 AM
#36
Least of my worries now! Am thinking of freezing all DE & race expenditures. I wonder how long before I'll find enough money in the account to buy a 7 cup. I am guessing about a year, which is all the more shocking.
It truly is a game of fools.
It truly is a game of fools.
03-25-2012, 11:14 PM
#38
Nordschleife Master
Are some of your shifting problems due to the crappy shifter cables? I have 2-3, 4-3 shift problems all the time (usually only when there are some lateral g's involved); however I'm almost certain it's cable related. I will be installing the motorsport shift cables which should rectify the shift issues hopefully.
Just had my tranny oil changed but didn't ask what it looked like. Even the first track day out this last weekend I still had shifting issues so I really don't think (in my case) it's related to the fluid.
JJ
Just had my tranny oil changed but didn't ask what it looked like. Even the first track day out this last weekend I still had shifting issues so I really don't think (in my case) it's related to the fluid.
JJ
If I did ot agian I wouldnt bother, its a trans problem
04-05-2012, 05:45 PM
#40
Nordschleife Master
Just got a diff through here that is a good example. When the outside looks like this, I always know that the inners are gonna be blue like the picture above:
That's after a partial cleaning. Here's what came off of it:
That's after a partial cleaning. Here's what came off of it:
04-05-2012, 10:25 PM
#41
Rennlist Member
Thread Starter
Ouch... Porsche needs to realize these diffs are the source of excessive heat and do something about it... as the 991 cars move towards PDK (I guess that's where the wind's blowing eh) I can't imagine having these pieces of crud flow around the tight confines of that PDK box... it's a disaster in waiting...
04-05-2012, 11:23 PM
#42
Rennlist Member
This thread makes me appreciate my gearing even more.
Just flushed the gear oil before the event last weekend, it was nasty black, and that was from only a few hundred miles of street driving after my new LSD install.
Speed = wear. It's just that simple. Want things to last longer, go slower, or buy a spec Miata.
Just flushed the gear oil before the event last weekend, it was nasty black, and that was from only a few hundred miles of street driving after my new LSD install.
Speed = wear. It's just that simple. Want things to last longer, go slower, or buy a spec Miata.
