Transmission Questions Base Cayman

Hey guys, long time member and reader here. I have never really posted here because the forums here have always answered any questions I have ever had about my car and more.... until now.... I think So I have a blown 5 speed transmission in my 2007 base Cayman . The car is no longer under warranty, so this is all on me. It's a long story but this is the direct result of abuse to the car, namely clutch drops (don't loan you car to friends, enough said). I would rather not get into a discussion about what happened and why since nothing from such a discussion would change the fact that I have a blown transmission. There was some excessive gear whine coming from the gear box, so I put the car on a lift and determined that there was at least a bad bearing. So I brought the vehicle home and drained the transmission oil. There were bits of either gear teeth or bearing raceways on the magnetic drain plug . So I pulled the transmission (really good fun, and I'm being serious here). I pulled off the transmission cover and examined the input and output shaft end bearings. No damage to bearings or raceways. I examined every tooth of every gear and examined the synchros very closely. No damage. So I dug further. I pulled the differential cover off and removed the differential. No damage to the differential or ring gear. BUT then I looked and the pinion gear on the end of the output shaft. 5 shattered teeth. Given how little damage there is to the rest of the transmission, the transmission can definitely be rebuilt. It should be a matter of a new output shaft and replace a few bearings and seals. However this is a lot of work (e.g. spacers, matched ring and pinion sets from the factory, etc) and certainly not free, so maybe just replace the whole transmission with a used low mileage one. I believe the 5-speed transmission I have is a G87/01 (sometimes called a G87.01). After doing extensive reading, I still do not know for sure if this is a Getrag transmission like many of the transmissions used by Porsche , or a V.A.G. transmission. The "G" in G87/01 kinda says Getrag, but that could just be a coincidence. I will say that there are VW and Audi symbols cast into the selector forks, so that kinda says V.A.G. transmission. If you look on eBay for VW Passat or Audi A4 5-speed transmissions from '99-'04, the transmission cases look pretty much exactly the same as the G87/01. Once again, points in the direction of a V.A.G. transmission. According to what I have read, if I do indeed have a G87/01, then it was used in the 987 Boxster from '05-'08 and the base 987 Cayman from '07-'08. The 5-speed transmission used in the 986 Boxster from '97-'99 was a G86/00 and from '00-'04 was a G86/01 (notice the very similar year range on the G86/01 to that of VW and Audi mentioned above). The gear and final drive ratios for the G86/01 are exactly the same as the gear ratios in the G87/01. The gear ratios for the G86/00 are the same as the gear ratios in the G87/01 for 1st 2nd and 3rd but 4th 5th reverse and the final drive ratios are different, so probably nothing I'm interested in. So here are some questions: Has anyone here put a G86/01 transmission from a '00-'04 Boxster into their base '07-'08 Cayman ? Will a G86/01 transmission fit? Would a G86/01 be a direct swap? Does anyone know the differences between a G86/01 and a G87/01 transmission? I have not looked up the gear ratios, but would a 5-speed transmission from a '99-'04 VW Passat or Audi A4 fit in a base '07-'08 Cayman ? I can get a totally raged out 5-speed transmission from a '99-'04 VW Passat for about $200 locally, I might be worth the cash just to know if it would work. Any insight would be appreciated. My apologies if this information is already in a thread somewhere and I just couldn't find it.

I have no idea about your question, but I will say I have asked G-Box a few questions and always found them very knowledgeable and happy to help, so you might try asking them.

Thanks cbzzoom. I just went to their web site. One word, awesome. I will definitely be giving them a call. I have done some more reading on the VW Passat and Audi A4 transmissions. It appears that all the variations have different (although seemingly compatible) gear ratios to the G87/01. Not too surprising as all of these transmissions were mated to less powerful engines. Some of the gear and final drive ratios are pretty interesting, and might open up possibilities to someone looking for different gear sets for their Cayman . I will be swinging by the dealer parts department latter today to ask price and availability questions. I'll try to get back on today and post what I find, as well as some pictures of what I have been babbling about (no promises). -Cheers