important question LSD limited slip diff.

[maryokaan]

hi everyone,

i have a plan about retrofitting a locked differential to my pasm equipped 997s (it does not have the -20mm option so i do not have the LSD). normally porsche does not give the lsd as an option but i found that at 996 you could find various brands of differential producers for locked ones.

i do not understand what kind of a connection there might be with PASM and the LSD.(in the sense of mechanical or electronical) (according to my knowledge pasm is a system for suspension only.the thing with only system which might have a connection with LSD or standart differential is PSM. and the -20mm car has the same psm system with the pasm equipped car.so if i replace my actual diff am i going to face any problems)

so my final question to the very technical guys is: do you find my plan applicaple? or do i miss some points?

or do you have any suggestions?

thanks all

[cibergypsy]

hi everyone,

i have a plan about retrofitting a locked differential to my pasm equipped 997s (it does not have the -20mm option so i do not have the LSD). normally porsche does not give the lsd as an option but i found that at 996 you could find various brands of differential producers for locked ones.

i do not understand what kind of a connection there might be with PASM and the LSD.(in the sense of mechanical or electronical) (according to my knowledge pasm is a system for suspension only.the thing with only system which might have a connection with LSD or standart differential is PSM. and the -20mm car has the same psm system with the pasm equipped car.so if i replace my actual diff am i going to face any problems)

so my final question to the very technical guys is: do you find my plan applicaple? or do i miss some points?

or do you have any suggestions?

thanks all

I am also thinking about installing a limited slip differential to my car but only using factory parts, because of warranty issues so far. I found on Porsche's PET catalog that there is a transmission with LSD for the North American cars but it is not offered at ordering time. The part number is 997.300.020.01 for the Carrera S and 997.300.020.31 for the Carrera 4 S. These transmissions are in the Porsche Cars North America PET catalog but I don't know why we cannot order them with the car when at the dealer, checking out the option boxes. I called the guys at Champion Porsche to find out if there will be issues with PSM and with the original manufacturer's warranty since this transmission, while being offered in their catalog, was not a factory option for USA or Canadian cars. I found the price to be quite agreeable if this indeed proves to be a transmission I can buy and that doesn't void the original vehicle warranty or causes any other issues wether with PSM or other systems. The transmission itself carries a 2 year, unlimited mileage warranty which proves fine for me because my car is 2 years old. Therefore, if it doesn't void the warranty on the car, I would still have my 2 extra years but would also have unlimited mileage on the transmission, whereas the rest of the car will have only until 50k miles.

As soon as I have an answer, I'll let you know, as well as the price also.

Regards.

Edited March 31, 2008 by cibergypsy

[david_yorkshire]

I'd also be interested in what you find - didn't want to lose PASM when I ordered the new car, but would love a LSD for trackdays.

[mapoune]

Alternative ... from Quaife LSD. Next upgrade for tracks.

http://www.optionimports.com/quaife.html

[maryokaan]

Alternative ... from Quaife LSD. Next upgrade for tracks.

http://www.optionimports.com/quaife.html

thank you for the comments. i got one from quaife. hopefully we will be able to install it this week but the official dealer has some hesitations about the installation procedure. so if any have a step by step installation guide for it; it is well appreciated.

[Daren]

The dealer installed my Quaife diff without any problems. The only thing I remember was that the diff needed to be shimmed to fit properly(I think it's common practice) which was subbed to a specialist. Total cost was around $500 if memory serves me correct.

[maryokaan]

The dealer installed my Quaife diff without any problems. The only thing I remember was that the diff needed to be shimmed to fit properly(I think it's common practice) which was subbed to a specialist. Total cost was around $500 if memory serves me correct.

exactly the shiiming is the problem which my dealer was hesitating (due to the lack of common practise i believe...)

i am planninng to let somebody else than official dealer fix my problem.

thank you