G50 / 20 6 speed Gearbox

[highflyer]

I know it's probably been done here before, but could somebody let me know what the G50 / 20 6 speed box is out of, and is it pretty straightforeward to change it over from the 6 speed Getrag box please.
Just found out its from a Swedish 993 they did it for alpine driving ?

Edited by highflyer on Monday 20th April 18:07

[Steve_D]

Was told mine came from a US spec. 993.

Fitting will depend on how your starter mounts. My bell housing needed a fair bit of clearancing on the inside to clear the flywheel. The starter mounts on the bell housing and points back under the drive shaft.

Steve

[Gulf -LS2]

no Russ it isnt an easy swap...

weve got a G50 20 in at the moment and the starter is on the same side as the Trag(crap to remove or change) but it can go either side, it uses the rods to change at the back of the box(autobionics converted on ours) as opposed to the Trag changes on the side with cables.

Its a great box though with Ultima friendly ratios and imo would be worth the effort, we will soon have a cable system that will work on the right or left.

[CanAm Dave]

Hi Russ

No it's not such an easy swap the main reasons being you will need a new adapter plate, flywheel, clutch and starter motor. This is because the belhousing is very different from the Getrag G96/00 and a G50. Good choice of box though as it has much better ratios.

Regards Dave

[highflyer]

Ok Dave, where do I source the flywheel starter etc etc from or is it on here somewhere, ive been back pages and pages of threads and can't seem to find it cheers.

[andygtt]

You can get it from the factory, kennedy engineering or from Gardner douglas... will be over £1.5k for all the bits you need to replace.

On the plus side you can sell the adapter box etc to help fund the change but its not a quick swop eaither as you have to consider the gearchange as well, drilling out new holes in bulkhead etc.

[highflyer]

Oh by the way Andy don't worry I am not changing anything on your car, its for another project, thanks for that.

[V8Dom]

Russ dont jump too fast for a 6 speed...I test drove a 996tt at the weekend and spent as much time operating the clutch as accelerator pedal when going for it....You dont need a 6 speed box with all that torque...

dom

[Mjpmark]

Which is the recommended 5 speed G50 then?
I was about to jump head first into the 6 speed.

Mark

[highflyer]

Dom, already have a getrag 6 speed on a 600+bhp supercharged motor and have been told that the getrag box causes the engine to use more revs "and juice" the G50/20 would be a better option but I am open to all suggestions I would actually prefer the right hand shift 5 speed what do you recommend ?

[Steve_D]

I have 6 gears. You don't need them with the range of torque available.
Andygtt had a 4 speed in his and was very happy with it.

I change gear two at a time.

Steve

[CanAm Dave]

V8Dom said:

Russ dont jump too fast for a 6 speed...I test drove a 996tt at the weekend and spent as much time operating the clutch as accelerator pedal when going for it....You dont need a 6 speed box with all that torque...

dom

Hi Dom

I have a 996TT box in my Ultima but with a taller 5th and custom 6th. The ratios suit the chevy revs down to the ground. 6500rpm rev limit with my motor. Mine is geared for 225mph in 6th at 6500rpm. This makes 6th a great cuising gear. Although 1st is a short gear it suits my setup as I have an unsprung triple plate clutch and hill starts in second would not be much fun. It's also helpful in traffic.

Russ the G50/20 in my opinion would be a good choice for that motor. Would help when cruising around europe as your looking to do.

Most of the 5 speeds to not have a tall enough 5th gear as standard. But you could always change the 5th gear.

I have an adapter plate, flywheel, clutch and starter for a G50 up for grabs at the moment!

I'll give you a call tomorrow!

Regards Dave

[Gulf -LS2]

Mjpmark said:

Which is the recommended 5 speed G50 then?
I was about to jump head first into the 6 speed.

Mark

Hi Mark

a G50 50 or 52 would be best but i doubt you will find one!! Lots of options on boxes, ive got a lot of info on them if you want a copy??

[V8Dom]

CanAm Dave said:

V8Dom said:

Russ dont jump too fast for a 6 speed...I test drove a 996tt at the weekend and spent as much time operating the clutch as accelerator pedal when going for it....You dont need a 6 speed box with all that torque...

dom

Hi Dom

I have a 996TT box in my Ultima but with a taller 5th and custom 6th. The ratios suit the chevy revs down to the ground. 6500rpm rev limit with my motor. Mine is geared for 225mph in 6th at 6500rpm. This makes 6th a great cuising gear. Although 1st is a short gear it suits my setup as I have an unsprung triple plate clutch and hill starts in second would not be much fun. It's also helpful in traffic.

Russ the G50/20 in my opinion would be a good choice for that motor. Would help when cruising around europe as your looking to do.

Most of the 5 speeds to not have a tall enough 5th gear as standard. But you could always change the 5th gear.

I have an adapter plate, flywheel, clutch and starter for a G50 up for grabs at the moment!

I'll give you a call tomorrow!

Regards Dave

Hi Dave you are right as i was going to explain... the four spped that Russ has in his canam is ideal due to the torque of a V8 ..if i was to build, i would use a 5 speed with the 4 speed ratios for the first 4 gears then the 5th gear for cruising and mpg. Oviously if you use a low first and then 5 gears its the same principle... the 6 speed in normal use is a little too much for the V8 as it was designed for a peaky turbo engine, however in Daves turbo ultima it might well be ideal.

looking forward to meeting you all at the weekend, and Dave if its ok id love to come over sometime and say hello as im only in Macclesfield just up the road..

Unfortunately looks like im buying a 996tt for now as i dont seam to be able to find the ultima ive always wanted, so hopefully the porsche prices will go up as they are so cheap at the moment

Dom
Dom