996 Turbo / GT2 Turbo discussion on previous model 2000-2005 Porsche 911 Twin Turbo and 911 GT2.

Interesting 2nd gear pop out avoidance mod-

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Old 02-15-2010 | 04:31 PM
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Interesting 2nd gear pop out avoidance mod-

Thread going on in the 996 forum...

Tempting. Thoughts? I know these guys know what they are doing...

https://www.6speedonline.com/forums/...ml#post2728616
 
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Old 02-15-2010 | 06:13 PM
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Gbox

These guys have a proprietary solution for the 2nd gear pop out. If anyone is going to develop "cheap insurance," you have to think these are the guys to do it.

http://www.gboxweb.com/996shimtip.html
 
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Old 02-15-2010 | 06:25 PM
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This is exactly what was done by my indy when my trans was out of the car. I believe that any knowledgable indy will know about this... My guy had a bag full of those shims and was able to show me on another transmission that was appart how they set them up, pretty much what is explained in the Gbox link. I'm pretty sure this is also what Douherty did to Jeff's (JCBMemphis) transmission...

Mike
 
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Old 02-15-2010 | 09:13 PM
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So Mike, your indy did the shims, but not the detent from gbox right?

Thoughts on the detent mod??
 
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Old 02-15-2010 | 09:55 PM
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Old 02-15-2010 | 10:53 PM
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Originally Posted by Mikelly
This is exactly what was done by my indy when my trans was out of the car. I believe that any knowledgable indy will know about this... My guy had a bag full of those shims and was able to show me on another transmission that was appart how they set them up, pretty much what is explained in the Gbox link. I'm pretty sure this is also what Douherty did to Jeff's (JCBMemphis) transmission...

Mike

Yep, I paid about that much for the part and about 100x that in the other stuff.

Guys, if this is simple...it is worth doing!!!

I contacted Erik, and Brian C..., and I had Dougherty call and talk to Erik and a few other guys. Only when he was satisfied that this was the real deal would he do it for me. No issues in over 10k miles. I consider this a mandatory fix that PCNA should offer to all owners. Just my 2c. Cheap insurance. I have it in my car and would not want a manual 996tt without it knowing what I know and having to have my car get a rebuild....granted, by a cup car shop. The tranny was better (and still is) than new.

jeff
 

Last edited by jcb-memphis; 02-19-2010 at 06:30 PM.
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Old 02-16-2010 | 01:29 AM
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So you guys are saying if your second gear hasn't popped yet and you want to avoid it, getting these parts will fix the defect before it happens?
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Old 02-16-2010 | 05:01 AM
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That's my understanding
 
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Old 02-16-2010 | 12:16 PM
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Ichiban - I realize that your question is directed to other member here, but I think that it should be clear. If you do not have this problem already, and would like to take preventative measures to help avoid it from happening in the future, this is the part you need.

If you already have this issue, then you still need this part, otherwise when your gearbox is rebuilt, the problem will arise again.

I hope that make it just a bit more clear.

Thanks everyone, we appreciate the opportunity to help, as well as the business.

Erik Johnson
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Old 02-16-2010 | 12:37 PM
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Originally Posted by Erik@GBox
Ichiban - I realize that your question is directed to other member here, but I think that it should be clear. If you do not have this problem already, and would like to take preventative measures to help avoid it from happening in the future, this is the part you need.

If you already have this issue, then you still need this part, otherwise when your gearbox is rebuilt, the problem will arise again.

I hope that make it just a bit more clear.

Thanks everyone, we appreciate the opportunity to help, as well as the business.

Erik Johnson
GBox Performance Transaxles
(303) 440-8899 work
(303) 895-4828 cell
Sweet so I need both shims and that little metal part? How much $$ would it run me for both and is it easy to install? I live in Canada so I don't think I'll be able to bring my car over to the states just so I can get those peices installed. What is the average installation price?
Thanks Erik!
 
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Old 02-16-2010 | 09:48 PM
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Eric, can you describe the difference (besides the obvious) between the shims that Mike describes above and the detent modification?
 
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Old 02-17-2010 | 08:51 AM
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Paulunm, not a problem. Both factors should be taken into account here, naturally the shims are important during a rebuild, as they are often not placed back into the same position that they were in during disassembly. The idea here is pretty simple the shims control the stack height and thus the engagement of the 2nd gear. This is due to the fact that the 1st and 2nd shift fork is not adjustable, as it has been in other gearboxes. Since this is a solid point the only way to adjust the engagement it through the shims, or through the locking device, which also controls the amount of movement allowed by the shift rod, and thus the fork.

The part that we are offering basically allows the shift rod to move slightly farther when you move your gear shift forward and back, thus giving you a better engagement of the operating sleeve to the dog ring itself.

I hope that made sense as the how each part plays a roll in this. Please let me know if I was not clear enough.

Warmest Regards,


Erik Johnson
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Old 02-17-2010 | 09:04 AM
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So, it also engages first gear a little more too?
ie, it increases travel rather than just repositioning it?
 
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Old 02-17-2010 | 10:05 AM
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Erik, when you have time, could you provide a cost breakdown of the parts along with an estimated # of hours for the install?

Thanks!
 
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Old 02-17-2010 | 10:44 AM
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As I recall there are TWO reasons for 'second gear pop out':

One is the incorrect stack height leading to the 2nd gear to the 1/2 operating sleeve being incorrect...essentially a mfg defect

The other is missed shifts leading to 2nd gear dog ring wear and then loss of engagement retention.

Two questions:

Is this true?
Does this fix address both failure modes?

Thx

A
 


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