Fixing our Cayman’s gearbox for thousands less than the dealer quote

Update by Tom Suddard to the Porsche Cayman project car
Jun 14, 2024 | Porsche, Porsche Cayman

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Our Cayman had a bad transmission–fifth and sixth gear simply not home.

The dealer quote to fix? About $15,000.

Yes, three zeroes to the right of the comma.

This little issue torpedoed the selling price of the Cayman, allowing me to pick it up for $15,000, about half of what it should have fetched.

[$15,000 Porsche: Are we stupid, or the smartest bargain hunters …

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thewaitingthrophyman GRM+ Memberand New Reader
6/14/24 12:15 p.m.

I feel like this needs a "dealers hate him, see how he beat them with this one simple trick" tagline, lol...

David S. Wallens
David S. Wallens Editorial Director
6/14/24 12:29 p.m.

In reply to thewaitingthrophyman :

Last time we did that (as a joke), people got a little, um, salty. 

Beat the Porsche Dealer With this One Little Trick

Hack Your Way to Saving $15,000 at the Dealership

Porsche Dealers Don’t Want You to Read This

But, seriously, glad you enjoyed it. Killer fix, huh?

DavyZ Reader
6/14/24 1:19 p.m.

I love articles like this :)   Makes me want to buy a Boxter or Cayman just to do this....but I know better lol

Driver_WT GRM+ Memberand New Reader
6/14/24 1:21 p.m.

Wow, awesome job.  Nothing like taking a look to see what is actually wrong, versus just quoting a crazy price for an entire new transmission.

j_tso Dork
6/14/24 1:26 p.m.

Would Permatex's Gear Oil RTV perform better, worse, or the same in this situation compared to the MotoSeal?


Tom Suddard
Tom Suddard GRM+ Memberand Publisher
6/14/24 1:57 p.m.

It's way thicker, so I feared it would negatively influence the tolerances. 

Toyspyder New Reader
6/14/24 2:49 p.m.

Congratz on your "like new" Porsche Cayman and for having the balls to take it on. So many (if not all) of these manufacturers do not want us to be able to fix the machines they produce. We have to keep doing the "impossible" just to show that we will not be deterred. 

Tom Suddard
Tom Suddard GRM+ Memberand Publisher
6/14/24 2:56 p.m.
Oldfast1227 New Reader
6/14/24 3:42 p.m.

Great read, great job!  Re; the light weight flywheel.  When I pulled the gearbox on my 01 Boxster to do the intermediate bearing fix I also elected to replace the clutch and put in a light weight flywheel instead of the dual mass original.  As long as you use a spring center clutch plate instead of the solid one as original there is no extra vibration and you get a quicker spin up when double clutching to downshift.  If anything it seems smoother in operation and just a bit quicker in acceleration acording to my g-meter.  Thanks for the article.

alfadriver MegaDork
6/14/24 3:55 p.m.

In reply to Toyspyder :

While it's admirable that they rebuilt it, and sucks that P doesn't repair, IMHO, the worst part of all of this is that P made a car with this rather nasty flaw.  Just like the bearing problem on the recent flat 6.  Why is P able to get away with making cars that have some really, really expensive flaws?  Ford had to recall all of their cars with the flawed transmissions- but somehow Porsche can continue to get away with some rather nasty flaws?

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