924Board.org

Swimming Bear · Guest

I wondered if any limited slip differentials were available for the stock transaxle of my 1977 924. I don't need one now of course, but it relates to whether or not supercharging is practical. P. S. check into these lysholm twin screw superchargers. 20psi by 2200 rpm (claimed) and you can still enjoy your exaust note.

Peter_in_AU · Joined: 29 Jul 2001 Posts: 2743 Location: Sydney, Australia

there's a throw-away line in the Haynes saying that all the 924 auto transaxles were built with a LSD.

Anyone know if there is any truth in that?

teo · Joined: 07 Sep 2001 Posts: 637 Location: Hungary, Europe

Newbie question:

what is this LSD and what is it good for?

I know it Limited Slip Differential, but nothing else.

TIA,

Teo

Peter_in_AU · Joined: 29 Jul 2001 Posts: 2743 Location: Sydney, Australia

Teo,

take a look at http://www.howstuffworks.com/differential.htm it's a good explaination of differentials and has sections about different types is LSDs. The animations a great if you have the time or bandwidth.

All of life's really big questions are answered on howstuffworks.

teo · Joined: 07 Sep 2001 Posts: 637 Location: Hungary, Europe

Wow, great site!

gone reading, will be back next week

AppleBit · Joined: 16 Nov 2002 Posts: 1516 Location: Minneapolis, MN

Qualfe (spelling) makes one... But more practical to put it in a 5 speed 924 gearbox or convert to a 944 gearbox with LSD like me

- Jon

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Porsche 924 Wide Body LS1 Corvette 500 Horsepower Engine

924RACR · Posted: Wed Oct 24, 2001 8:47 am Post subject:

Who told you that???

I called Quaife, and Torsen as well, and they both said they don't make em...

Any part #?

I'm gonna be too broke to buy one this winter, but still have a need for either that or a 944 LSD unit... how much did your 944LSD box cost, BTW, and what year/model car is it sourced from?

_________________
Vaughan Scott
Webmeister
'79 924 #77 SCCA H Prod racecar
'82 931 Plat. Silver
#25 Hidari Firefly P2 sports prototype

larso · Guest

LSD and what is it good for, it comes in a small bottle at the corner of your street.
just kidding now

AppleBit · Joined: 16 Nov 2002 Posts: 1516 Location: Minneapolis, MN

The 944 and the 924 5 speed qualfe are the same thing... Qaulfe just doesn't know that...

nothing for the 4 speed... but who would want to in the first place?!

Are you in need of a 944 tranny? I know of one here for $600......

- Jon
ÿ

Joes924 · Guest

Guard Tranny E-mail: gears@gte.net

offer limited slip & torque biasing diffs
for pro.pca or street and

chromoly lsds also

pst · Guest

According to the Porsche PET, the early 944 LSD fits the 80 and up 5 spd 924 transaxle. The diff's are different on the 85.5 944 and don't fit the early ones. The only aftermarket LSD's that I know of are for the late transaxles.

yOnKiNaToR · Guest

i don't think the '88 924S came with LSD...anyway i could get it without switching to a longer fifth-geared 944 tranny?

goc931 · Guest

The LSD used in the 915 gearbox placed in 911's from 1973 to 1987 is bolt on(with alignments) in 931 gearboxes, the G31/01 that is.
They cost like 600$ used or 2500-3000$ new.

My 5 cents

924RACR · Posted: Mon Jan 07, 2002 11:18 pm Post subject:

Again, to clarify. There is a stock Porsche LSD for the snailshell type transmissions. It's finding one for the Audi-based boxes (924 4-speed, post-79 924 5-speeds, and post-80 931 5-speeds) that is a problem.

I'm curious if Guard would have any; not going to bother him until I've got resources to actually purchase one. I'd expect them to be at least comparable prices to the Quaifes, which is to say about $1200+

_________________
Vaughan Scott
Webmeister
'79 924 #77 SCCA H Prod racecar
'82 931 Plat. Silver
#25 Hidari Firefly P2 sports prototype

teo · Joined: 07 Sep 2001 Posts: 637 Location: Hungary, Europe

This is from rennlist, might help to find those LSD units:

>>
Here's what appears in Peter Morgan's book, ORIGINAL PORSCHE 924/944/968:
From the 924 section:
"GEARBOXES...Numbered by type, followed by a five-figure number
series denoting date of build (eg, YR19026 - built on 19 February 1976).
The four-speed Audi unit was coded 088/6/YR (Europe/RoW) or
088/A/XT (US/Japan). For 1978 the Getrag five-speed gearbox (016) was
optional on the 924, coded 016Z/VA (Europe) or 016Y/VB (US). If the serial
number has the digit 12 after the designator then a limited slip
differential is fitted.
From 1980 the Audi five-speed gearbox was introduced, of type 016/8
(Europe/RoW, initially with serial number prefix VQ) or 016/9
(US/Canada/Japan, initially with prefix VR). From 1981 the prefixes
changed to MD (Europe/RoW), MF (US/Canada), or ME (Japan). When fitted
with a limited slip differential, the code was 4Q (Europe/RoW) or 5Q
(US/Canada/Japan)."
From the 924 Turbo section:
"GEARBOXES...For 1978-80 the cars were fitted with Porsche/Getrag
G31/01 (Europe/RoW) or G31/02 (US/Japan). From 1981 the US/Japan 924 Turbo
Series 2 used the Audi 016G (coded MB for the US, MX for Japan)."
From the 944 section:
"GEARBOX NUMBERS...(From 1982) Manual transmissions were: 016J,
coded QK (Europe/RoW); 016J, coded 7Q (Europe/RoW with LSD); 016K, coded QM
(US); 016K, coded 8Q (US with LSD); 016K, coded QL (Japan); 016K, coded 4M
(Japan with LSD)."