6 captured repliesDiscussion pagination complete · Source accounts, not a confirmed diagnosis
THIS DISCUSSION / SOURCE-DERIVED OVERVIEW
Discussion summary
YOUR RESEARCHPorsche Transmission Companies
Leading reported evidence
Use g-box rebuild
Performed · outcome unconfirmed
No successful repair reported for this finding.
0
Reported fixes
0
Unsuccessful attempts
1
Discussions
Read evidence and context
Explicit resolution reports before identified causes, performed actions and suggestions. Within each level, matching component labels precede direct query mentions and inherited thread context; successful versus unsuccessful discussion counts, owner confirmations and independent discussion support determine order. This is not a probability of success.
Discussions that performed work without a confirmed outcome
1
0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.
0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.
Leading evidence: 'Use g-box rebuild' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Use g-box rebuild' (1 discussions). For that action, 0 discussions report a resolution and 0 report an unsuccessful attempt. No action has an explicit, attributable resolution report under the current rules. These are forum reports and suggestions, not a confirmed diagnosis.
Source reports, not a diagnosis or a success probability. Counts refer to discussions and can overlap.
Counts describe captured discussions, not unique people or a diagnosis. Author identities are not reliably stored. Exact duplicate evidence is counted once across matching discussions; one discussion counts at most once per action/state. Multiple repairs reported together remain a combination. Suggestions and failed attempts do not establish a fix. Matches cover whole discussions and can include related faults, model variants and incomplete threads.
6 eligible posts · 0 unverified posts · 1 discussions match the subject in their title or opening post.
Rennlist: 1 discussions
0 evidence records excluded for query context · 0 excluded by outcome qualification · 0 adjusted by outcome qualification.
0 acknowledgements have no verified action link; they do not establish a repair result.
Generation: 20261026T212127Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources
Rolling list of companies who rebuild Porsche Gearboxes. If you have any experience with these companies, work for these companies, or have had a rebuild at another company not listed here feel free to introduce yourself and share your story and I will update as needed.
COLORADO
There are 3 Porsche transmission specialists all within a few blocks of each other in Boulder, Colorado. I wasn't aware that CO was the Porsche Tranny hub of the US.
GBOX
gboxweb.com
Customers on the Forum
Lysoleverywhere
Aug 4, 2010 - I have personally spoken to Stan at Gbox (gboxweb.com) several times, and he's an extremely nice guy, and very knowledgeable of the drivetrain on these cars. I believe him to be a very honest guy, and I'm confident I will get top notch results from him based on our conversations - To wit I just shipped my 2003 996 Turbo transmission to Gbox to upgrade to taller OEM German Getrag GT2/Turbo gears and to fix/prevent the 2nd gear popout issue. I will keep everyone informed of the outcome.
Carquip
carquip.com
Customers on the Forum
n/a
Guard Transmission
guardtransmission.com
Customers on the Forum
n/a
OHIO
Brian Copans
http://www.bmcg-gearbox.com/
Customers on the Forum
n/a
Highly regarded by tuners
Pricey
plan on waiting a LONG time from what I hear.
What's your experience?
If you'd like me to add anything, or have any questions feel free to PM me or give me a call if I don't respond. Transmissions are extremely pricey, and can be a bit of a sore subject so I think this will help look out for the members best interests.
Regards,
Joe Taylor
Atlanta, Georgia
[phone removed]
G box and guard are almost neighbors. they made gears and lsd
copan, bow to trans axle god. brian doesn't manufacture parts, but installs, fix and does magic with them.
While I have not business will Gbox, Eric impressed me with his knowledge... If I was in the US, I would have bought one of their remanufactured units.
I'm use a G-Box rebuild for my 3.4 race car. Great service with a quick turn around and fair prices. These Gertag boxes are a POS to begin with, Stan gently holds my hand when I rant. He has made some valuable suggestions regarding coolers, gear oil, etc. Too bad I can't bolt up a G50 variant....
I run a Guard GT diff in the Gertag gearbox setup at 50/80. One of the most valuable tools you can have in a race setup.....
