what's wrong with our 2nd gear?
 

Hello. I've got the recurent problem of the 2nd gear with my car.
When I slow down, it disengages itself at about 25000 rpm.

I think it's a locking problem on a shaft but I guess some of you already had the same problem and solved it, so I ask this to you?
What is the part that causes that and what is to be changed?
My ckutch is dying, so it could be time to make everything at the same time.

http://www.gboxweb.com/detent.html
That might help you

It's called 2nd gear pop-out you can hold your shifter in 2nd gear under deceleration to prevent it from popping out further, this of course is only a temporary solution. The only way to fix it is a transmission is a rebuild I know it sucks I just had mine rebuilt last year for the same issue though I lived with it for a year till my clutch started slipping so I waited till it needed replacing then did it all at once. A basic rebuild will cost $3500-$5000 depending what else you replace/upgrade. I also had the gbox 2nd gear detent installed when transmission was rebuilt.

Yes it helps, thank you very much.
I'm really surprised to see this part exists.
In a post, pinoy911tt says: "yup, you could actually feel the shifter go deeper into the gear". So can we understand that the problem is that the original part doesn't go deep enough???
I'm affraid that piece is a preventative solution...
Is that works when the gear allways pops out (in deceleration at the same engine speed). How to know that my gear box has no damage Inside???

Thank you, that is what I was afraid of... How long did the detent helped you?
What parts had you to change? What are the damages Inside?

If your 2nd gear has popped out more then 2 times the 2nd gear detent will only be a temporary solution if it works at all. I had the detent installed when my 2nd gear first popped out it only happened 2 times before it was installed it worked for about 2000 miles then started popping out of gear under deceleration. You can continue driving your car it wont cause more damage to the other gears it's something you could live with but extremely annoying knowing your 2nd gear can pop out of gear. Here is my thread when I did mine. https://www.6speedonline.com/forums/...uild-time.html

you do have damaged parts. it didn't drive like that from the showroom floor. there are many many threads on the cause and the cures. the best thing you can do is repair your gearbox by replacing gears 1/2 and the accompanying parts e.g. the synchro for 1/2 as that along with possibly rounded 2nd gear is why it DIS engages.

your other options i think in order of how well they might work as a stopgap and *possibly* even a preventative fix IF the synhros and/or 2nd gear is not already too "rounded", is:

the gbox "detent" which 602 has mentioned above ( meh..1/2 as*ed fix )
the "shift arrester" which i think?? CA MOTORSPORTS? sells ( do a search ) 3/4 as* fix

and perhaps best yet, next to the above mentioned best solution of rebuilding it "properly" is the
8 MM Ball bearing insert another 3/4 x 2 and better quicker cheaper fix as threads ( do a search in here for "so easy a caveman can do it" that one of the contributors here has either thought up or discovered timnyc(?) sorry names escape me ) do a search for it. that one is pretty effective long term, i believe.

so i'd rebuild it
8mm ball bearing insert it
or: hold your hand on the shifter every time you're in 2nd. seriously, those would be your options.

but anything short of a rebuild, is well, short. good luck, it's a nasty little issue. been there cpl times.

My new gear box pops out of second too, and it's a fresh build haven't even drove it hard yet. My old original box with 110k never did once and the new one was built by one of the best. I think it's a crap shoot:(

Sorry it's not a crap shoot whoever built your transmission either built it right or wrong. If it's popping out of 2nd on a fresh rebuild i would call your builder to see if he warrantees for the first twelve months because that's not normal.

..only to add they MUST re-open it and warranty their work, esp if they provided ALL parts.

man, that sucks. i know what happened as porsche did same to me. had to open it twice.

the key was RESHIMMING to different gear stack placement and updated specs which porsche provided to their own master tech after their rebuild went south within a cpl k miles!

they had no choice but STILL gave me a rash of sh*t as IF it were in ANY way my fault or i was causal. hah as if.

bro, call them and DEMAND redress. they have to honor it. 12 months sounds right. if THEY provided the parts they were simply part of the bill. this is key.

Thank you to you all for your informations and experiences.


Really really interesting. Thank you. I found the post by TimNYC and I think that I'm gonna first do this modification.
After this, maybe I'll buy the shift arrester that seems to be the real cause of the problem.
I've got good hope my synchros are in good condition because I haven't got any probleme to engage the gear, just as the gear is strongly engaged exept at the precise torque range (about 2800 rpm precisely)

i'ts my pleasure to try and help as ive lived thru this with Porsche and this was early enough in the cars history for them to have even attempt to suggest it was some kind of one of anomaly. until there were eventually so many victims, they had to end up taking responsibility. but I had a decent short battle with them over it :)


but the issue is with the rounded 2nd gear synchro "dogring" which is a component of the triple cone synchro setup that was used to help give these cars a very smooth shifting experience ( I'm a big fan of irony lol ) so the probability IS that it is your synchro's in fact have already "rounded" to the degree that it will not allow for any continued engagement under load. mine even popped out going UPHILL once.


which in and of itself does NOT mean the the shift arrester or the 8MM ball bearing might NOT prevent it from popping out or getting "worse" but once its bad it aint getting better. that's why I advise a rebuild as you can then change out the bearings which are going to dry out at some point in the life of the g50 box anyway. so, do it now or do it later.


..my advice, don't bother with the gbox dtent. GL and lemme know if I can be of further help. GL w it. its frustrating as hell.

as i remember bad syncro
(MISPELL) had mine replaced at nc from porsche

Take a look at post number 24 in the thread below. It will help you see the problem.

https://www.6speedonline.com/forums/...r-specs-2.html

Good luck,
Steve