Thats a gear set shim issue not a power issue

 

I see. It only started happening after I went from an EVT580 to a EVT700 build. I guess it was just coincidence then.

Still requires cracking open the trans though. We tried the detents and that didn't help.

 

yea most likely to user error rather than power. however high hp can def increase user error and consequences from it.

detents wont do anything after the fact unfortunately.

 

Once the issue shows up its to late. The issue is a rounding off if the teeth due to improper shimming. Common on the 996 turbo trans

 

Interesting, I haven't heard of too many if any pop out issues on 997TT but plenty 996tt's

 

My 997tt pops out.
Now, I'm going to try the ball bearing this year. (See the 996 forums about the ball bearing)
I know people will say it doesn't fix it but after more than a year someone who did this gave me an update and stated it hasnt happened since the ball was in place. Of course, mine went all spring, summer and autumn in 2014 without it happening except on the last day before storing it. But for $1.00 it's worth a shot

 

A lot of answers, not much facts.
Here are:
-once 1,6Bar reached (not for a glory run, every day the car goes out) on my E85 3,8 built, the highest organic Sachs LFW clutch was sleeping about 4500 in 4rth and upper gears. Torque was about 850lbs.
I bolted a Protomotive twin clutch, no slippage anymore but the gearbox became quickly "chewy" and the 2nd gear went (synchro and pop out): once open we saw some bearings went and the shafts had axial clearance, so bad gear locking and the reason the 2nd went. (Gearbox was 48000km)

-the gearbox was rebuilt (cost about 8k€) and seemed fine about 5000km, but recently the "chewy" feeling came back and the 3rd synchro went. Once open we saw the mainshaft bearing failed and again the shafts had axial clearance, explaining the "chewy" feeling and bad gear locking destroying the synchros.

Notice my use is mostly rolling starts from 60mph in 3rd and 4rth gear, putting much load on the gearbox, tires are MPSC2, quite sticky.

The future will tell us with the other builts, my guess is the 997TT gearbox holds well until 800lbs, perhap's a bit more but repetitive high gears pulls destroy its bearings and in consequence the whole gearbox.
My 50 cents.
P.

 

Fact!
he fried my ERP triple disc after a grueling dyno and street tune but I'm very happy with the results because everything else held I just hate waiting for the replacement clutch it takes soooo long!