Phase 2 of my build in progress

[Ryan_Cunningham]

Originally Posted by gsmith660

Not real sure but I am thinking it is cheaper than the G50 conversion I am into it for about 11-12 k right now with probably another 3k to go but most of that I would have to do for a G50 also considering the cheapest G50 I found rebuilt was 15k I am ahead of the cost curve and I have a 6 speed vs a 5 speed. Things left acquire are the shifter and the pedal assembly and the limited slip G50 pedal assemblies are non existent or expensive I am money ahead on that also. It all depends on the effort you want to put into it. Even a G50 needs to be broke down to modify it for an easy install and from what I have seen the cost of that is 3500 plus shipping to and from if you dont have someone local that can do it.

I was running the numbers and I think it'd be roughly $15-20k. Probably a bit less if you're able to do all the fab on your own. But I agree, I'd prefer the G96 over the G50.

Originally Posted by gsmith660

Are you an aviator Navy or Air Force? I am a submariner myself

I flew F-18s for the Marine Corps. I now train F-35 students in the simulators at Miramar. Nice - I don't know how many novels about submarines I've read throughout the years.

[gsmith660]

Originally Posted by Ryan_Cunningham

I was running the numbers and I think it'd be roughly $15-20k. Probably a bit less if you're able to do all the fab on your own. But I agree, I'd prefer the G96 over the G50.



I flew F-18s for the Marine Corps. I now train F-35 students in the simulators at Miramar. Nice - I don't know how many novels about submarines I've read throughout the years.

Thank you for your service sir Semper Fi

[gsmith660]

The transmission is back together and it hits all the gears finally.

[gsmith660]

The rest of te conversion parts are on the way and I found some good pics of how to reinforce the tunnel area after cutting out the torsion tube so I will document that as well

[gsmith660]

I am really itching to get started on this conversion but I just have to wait until I have a few more parts and the first step is rear suspension then mount the trans in the car and set up the shifter/center console then mount/setup the e-brake. Lots of metal work/welding to mount the transmission and the e-brake. I also have to figure out how to mount the heater controls in the new center console and the dial of death for boost control. Gonna take me a bit the good thing is the rear suspension upgrade can me made and I can still drive the car and get a 4 wheel alignment done then bring it back and when I have the shifter and oh I forgot the pedal assembly to setup the hydraulic clutch new brake system and cable driven throttle. I would love to setup drive by wire on the throttle but I think that is beyond the scope of what I am doing at this time.

[gsmith660]

Got most of the parts for the conversion acquired

[Jeff Alton]

Question for those that are swapping or thinking about swapping one of these gearboxes into your car.

What makes you think it is a good and reliable gearbox alternative?

Not judging, just asking.

Cheers

[gsmith660]

Originally Posted by Jeff Alton

Question for those that are swapping or thinking about swapping one of these gearboxes into your car.

What makes you think it is a good and reliable gearbox alternative?

Not judging, just asking.

Cheers

For the most parts other than the 2nd gear issue and the pinion gear on the early boxes most of what I have read has been positive and if you change the 2nd gear hardware and apply the solutions for that issue which I did it has proven to be a reliable and smooth transmission at nearly half the cost of a G50 if you can find one

[gsmith660]

Cost comparison

G96 with repairs 5500 that includes shipping
G50 rebuilt 13000 and up

G96 adaption kit 8500 includes clutch
G50 machine work 3500 and up plus shipping to and from who can do the mods I have no one around me that can do it thats about 5-600 clutch approx 1200

pedal assembly G96 500
G50 3500 was the only one I could find and I am pretty sure that one would have needed rebuilding

still would need body mods mount mods a new shifter and linkage but I think the G96 shifter still has that beat from what I saw and I get a very smooth 6 speed with great ratios.

so for comparison
G96 14500$
G50 21800$
And thats a rough comparison
G50 parts were just hard to find and when I did they wanted your first born child for them for the most part even Patrick motorsport didnt have the nuts and bolts parts like they did 10 years ago.

[quattrorunner]

Interesting.

[gsmith660]

I actually think the cost of a G50 conversion is higher than I quote because I didnt include stuff like the flywheel and ring gear

[Tonger]

Originally Posted by gsmith660

Cost comparison

G96 with repairs 5500 that includes shipping
G50 rebuilt 13000 and up

G96 adaption kit 8500 includes clutch
G50 machine work 3500 and up plus shipping to and from who can do the mods I have no one around me that can do it thats about 5-600 clutch approx 1200

pedal assembly G96 500
G50 3500 was the only one I could find and I am pretty sure that one would have needed rebuilding

still would need body mods mount mods a new shifter and linkage but I think the G96 shifter still has that beat from what I saw and I get a very smooth 6 speed with great ratios.

so for comparison
G96 14500$
G50 21800$
And thats a rough comparison
G50 parts were just hard to find and when I did they wanted your first born child for them for the most part even Patrick motorsport didnt have the nuts and bolts parts like they did 10 years ago.

Cost analysis for G50 route - I understand your enthusiasm for the G96 mod and I think it's great that it offers 6 speed capability. However, I don't think that the need to extensively modify the torque tube should be so easily discounted.

My friend has just completed a G50 swap in his 1978 930 and didn't incurr costs anything like the math above. We are currently swapping a G50 into my '77 coupe (will need torsion modification). Here are our real world numbers below:

G50 Transmission
Current offering: $8100 shipped
https://www.ebay.com/itm/116848576258?_skw=g50+transmission&itmmeta=01KCHRHDGXA59T03DZW2GK6QCB&hash=item1b34b7c702:g:UpkAAeSwS~5o~~~U&itmprp=enc%3AAQAKAAAA8FkggFvd1GGDu0w3yXCmi1dFKb8NH LizoQ%2FKG1JPAS9KA8eY1pxjwAufOx4OwRQkNx%2F2XjLx38V Uwll%2BP89NuZ27Ay4JUXgBaaCi4%2FP7rEpnUznxAs%2BlvFj mPMA7iiOWHGbb8x0eALKb8aqWqoeDckBzu2D3ovwdtizLeuCuK 5z6scNWL4vzD4PYrqSfHMXEQY7LGDS7PFea25yexmPiI4RMYn1 KTQ1KxVU7SpJ7t%2FJb3qP1Zaazs2VXo98PwRxN720zbc83V28 XNJvDSjrbP7eszezGEVn0Lf7sW1sptuoouWJG2AbTvjT0c2r2g NFprw%3D%3D%7Ctkp%3ABk9SR9zYxbjkZg

Current Offering: $9500
https://forums.pelicanparts.com/porsche-911-used-parts-sale-wanted/1164787-g50-transmission-g50-01-a.html

Historical G50 prices:

Tonger purchase #1 from US: G50 964 with LSD- $7000 (10/23) + $1000 conversion to ’87-’89 shift selector and nose cone. $8k total with LSD

Tonger purchase #2 from Germany: G50 ’87-89 without LSD (7/24) – 6,300 Euros plus $750 shipping. Approx $8250 total.

Mepstein from 7/25 with < 45k miles (no LSD) - $9500
https://forums.pelicanparts.com/porsche-911-used-parts-sale-wanted/1180214-g50-transmission.html

mepstein from 7/24 “good running” - $7500 (marked down from $9500)
https://forums.pelicanparts.com/porsche-911-used-parts-sale-wanted/1161333-1987-g50-transmission.html

G50 shortened bell housing and input shaft machine work - $700 at California Motorsports
https://californiamotorsports.net/products/shorten-bell-housing

Pedal Cluster – adapt existing 915/930 pedal box - $500 new stainless steel fabricated pedal box



Shifter – JW West $525 plus OEM G50 Shifter $600 (8/24) - $1150 total with JWest mod, $600 OEM

Tunnel shift rod - $500

G50 Retrofit Shift Coupler – Patrick Motorsports - $315
https://patrickmotorsports.com/products/trag50psjwevo?srsltid=AfmBOooS5gSTFIqqKueBZ0UM8Ntm mV0XnNcvJghITkXSLNKBlIWDdF1l

Adjustable Transmission Mount – Patrick Motorsports - $485
https://patrickmotorsports.com/products/tra950g50sbhatmpms?srsltid=AfmBOoqBxryfTjwGaFyOyyp K8N13RDbNFRme0M0y6zpE5xXwVb8wSmBG

Not having to cut the torsion tube - PRICELESS

If you do it the 'cheap way' - you can do it for a low number of about $11,500 since the shortened G50 fits in the 930 chassis. My friend just updated the synchros in his G50 and sealed it back up with the shortened bell housing. Not having to mess around with the torsion tube was nice. Aside from the shifter, the interior looks stock.

[gsmith660]

I was going off what I could find good that you have connections to make it cheaper the cost on the input shaft and bellhousing is way lower than what I was quoted because of the disassembly required. What it boils down to is what flavor you want to go with and the costs incurred due to location again I want to express I live in a location that has no one anywhere near that can do the stuff I cant so if you have people close that can do the work thats good the quote on the mods to a G50 were from Patrick and I just saw on their website it doesnt look like they are offering that any longer

Originally Posted by Tonger

Cost analysis for G50 route - I understand your enthusiasm for the G96 mod and I think it's great that it offers 6 speed capability. However, I don't think that the need to extensively modify the torque tube should be so easily discounted.

My friend has just completed a G50 swap in his 1978 930 and didn't incurr costs anything like the math above. We are currently swapping a G50 into my '77 coupe (will need torsion modification). Here are our real world numbers below:

G50 Transmission
Current offering: $8100 shipped
https://www.ebay.com/itm/116848576258?_skw=g50+transmission&itmmeta=01KCHRHDGXA59T03DZW2GK6QCB&hash=item1b34b7c702:g:UpkAAeSwS~5o~~~U&itmprp=enc%3AAQAKAAAA8FkggFvd1GGDu0w3yXCmi1dFKb8NH LizoQ%2FKG1JPAS9KA8eY1pxjwAufOx4OwRQkNx%2F2XjLx38V Uwll%2BP89NuZ27Ay4JUXgBaaCi4%2FP7rEpnUznxAs%2BlvFj mPMA7iiOWHGbb8x0eALKb8aqWqoeDckBzu2D3ovwdtizLeuCuK 5z6scNWL4vzD4PYrqSfHMXEQY7LGDS7PFea25yexmPiI4RMYn1 KTQ1KxVU7SpJ7t%2FJb3qP1Zaazs2VXo98PwRxN720zbc83V28 XNJvDSjrbP7eszezGEVn0Lf7sW1sptuoouWJG2AbTvjT0c2r2g NFprw%3D%3D%7Ctkp%3ABk9SR9zYxbjkZg

Current Offering: $9500
https://forums.pelicanparts.com/porsche-911-used-parts-sale-wanted/1164787-g50-transmission-g50-01-a.html

Historical G50 prices:

Tonger purchase #1 from US: G50 964 with LSD- $7000 (10/23) + $1000 conversion to ’87-’89 shift selector and nose cone. $8k total with LSD

Tonger purchase #2 from Germany: G50 ’87-89 without LSD (7/24) – 6,300 Euros plus $750 shipping. Approx $8250 total.

Mepstein from 7/25 with < 45k miles (no LSD) - $9500
https://forums.pelicanparts.com/porsche-911-used-parts-sale-wanted/1180214-g50-transmission.html

mepstein from 7/24 “good running” - $7500 (marked down from $9500)
https://forums.pelicanparts.com/porsche-911-used-parts-sale-wanted/1161333-1987-g50-transmission.html

G50 shortened bell housing and input shaft machine work - $700 at California Motorsports
https://californiamotorsports.net/products/shorten-bell-housing

Pedal Cluster – adapt existing 915/930 pedal box - $500 new stainless steel fabricated pedal box



Shifter – JW West $525 plus OEM G50 Shifter $600 (8/24) - $1150 total with JWest mod, $600 OEM

Tunnel shift rod - $500

G50 Retrofit Shift Coupler – Patrick Motorsports - $315
https://patrickmotorsports.com/products/trag50psjwevo?srsltid=AfmBOooS5gSTFIqqKueBZ0UM8Ntm mV0XnNcvJghITkXSLNKBlIWDdF1l

Adjustable Transmission Mount – Patrick Motorsports - $485
https://patrickmotorsports.com/products/tra950g50sbhatmpms?srsltid=AfmBOoqBxryfTjwGaFyOyyp K8N13RDbNFRme0M0y6zpE5xXwVb8wSmBG

Not having to cut the torsion tube - PRICELESS

If you do it the 'cheap way' - you can do it for a low number of about $11,500 since the shortened G50 fits in the 930 chassis. My friend just updated the synchros in his G50 and sealed it back up with the shortened bell housing. Not having to mess around with the torsion tube was nice. Aside from the shifter, the interior looks stock.

[gsmith660]

The CMS quote is only the machine work you must disassemble the transmission and send only the bellhousing and input shaft the additional cost is to have them disassemble and machine I contacted all the transmission shops within 100 miles and none wanted to touch a Porsche box which is why I did the 2nd gear repair myself a friend managed to find a race shop that will install the LSD for me but wouldnt do any other work on the box so location has alot to do with my decision. The price quote on the rebuilt box was including a 6000 dollar core charge and they would not take a 915bas a core so 7000 for trans plus 6000 core.

[gsmith660]

I like that pedal box I would be going that route if I could adapt the throttle to the G96

[gsmith660]

I also want to express this is not a thread to debate the merits of either route both have merits and if I could have found the G50 stuff I probably would have gone that route the cost comparison was in response to Jeffs post and was for my location only. This thread is to document the route I chose to go for others to follow along for the pure enjoyment of it nothing more. Some mods such as the 996 center console and ebrake mod was something I wanted to do years ago but couldnt make it work with a 915 shifter so I am doing it now since the 996 shifter requires the clearance

[gsmith660]

https://www.ebay.com/itm/227131620341?_skw=G50+Transmission&itmmeta=01KCJ31G95CXPPNPXPFEG698SW&hash=item34e2197bf5:g:qVIAAeSwxxBpPtJn&itmprp=enc%3AAQAKAAAA8FkggFvd1GGDu0w3yXCmi1fDIigiK Bc43DrW6%2B88Szf5FjYGLmJnzKL%2BAP1002NmP8A90m0GkPO fAbB1Q1xUWghogrr%2BXAN2bYB795mNOEL70caxBKFNQMydzF3 X3FO54KoJD2rQyXcfIYhe3nyWAHih%2BuzSeH9W%2FUG%2FssS LnoVSALUwuvsrJGOshDQOj7XjoaAsAx4kgcFt5I55GfSdKDWYm iDdaaISrO8%2B794g8%2BzTkLvYHbhZsqvd1KLtO9fTzzFN5h7 1RwBHARqPMvBU1SNllQAZEJjvdsRZQ7yDuOSmWb7nIStJyUhpf 0vY9BiLPg%3D%3D%7Ctkp%3ABk9SR-CEhsPkZg

Dont know if the link will work but here is a complete G50 conversion package on ebay asking 25000 all stock no performance upgrades pretty much falls in line with my numbers plus 1400 shipping and still needs the 500 dollar mounting plate so located in Latvia the trans above is in Greece have no idea if there are tariffs involved getting them into the US

[gsmith660]

Due to US customs policies, the buyer of this item will need to pay import fees to the shipping carrier prior to delivery question answered

[Jeff Alton]

I was only asking as I was curious, not to start a debate.

Its not a gearbox we consider to be "robust" though not "weaK" either.... Hence my curiosity.

FWIW, We have 996 Turbo box apart rightnow that lost the pinion shaft bearing. IN USD its a 18K rebuild as it needed a new pinion shaft and matching ring gear, bearings and everything else one does while you are in there.

Cheers

[gsmith660]

Originally Posted by Jeff Alton

I was only asking as I was curious, not to start a debate.

Its not a gearbox we consider to be "robust" though not "weaK" either.... Hence my curiosity.

FWIW, We have 996 Turbo box apart rightnow that lost the pinion shaft bearing. IN USD its a 18K rebuild as it needed a new pinion shaft and matching ring gear, bearings and everything else one does while you are in there.

Cheers

No worries while I had the box open it looked like it was pretty robust and I am under the impression the 02 version fixed the pinion bearing issue