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endwrench · Joined: 07 Dec 2002 Posts: 1631 Location: Victor, Montana

Hey,

Lurking around again and came across the thread about the OBX LSD diff for the snail trans. Got me looking on E-bay for something for the Audi trans as I have a 944 tranny in mine. It seems hard to believe I am the first to come up with this question so I will throw it out there again. I did a quick search of the sight and found nothing.

Quaife shows a list of vehicles that their $1800 LSD for the 944 fits and looks like this:

Audi (front), Coupe GT, 4000 Quattro, Quattro (016/093 trans) Audi(rear)

Audi (rear), A4 Quattro

Porsche 944 (1986 onwards incl turbo)

Audi 4000 Quattro Cs (1984-1987)
Audi 4000 Quattro S (1984-1987)
Audi A4 Quattro Avant (1996-2009)
Audi A4 Quattro Base (1996-2009)
Audi A4 Quattro Cabriolet (1996-2009)
Audi Coupe Gt (1984-1987)
Audi Quattro Base (1983-1986)
Porsche 944 Base (1986-1991)
Porsche 944 S (1986-1991)
Porsche 944 S2 (1986-1991)

Hmmm, Audi A4? I've driven them and am pretty sure they have LSD. This says they come standard:

http://www.automotive.com/2002/12/audi/a4/standard-equipment/index.html

So I look on E-bay again and find dozens of complete diffs for $100-300.

Is this too good to be true? Please correct me and call me a moron. I'm sure I am missing something simple. Probably some German thing. If not maybe tell me the style of LSD it is.
_________________
'79 924NA. Rebuilt 9.5:1, MSDS header, Mega Squirt Injection, MJLJ-EDIS Ignition, 1.6L Whipple Charger and Intercooler, 10lbs Boost, 944 Trans, Custom HD Clutch.
"simsport" said....superchargers are better than turbos its official!....

morghen · Joined: 21 Jan 2005 Posts: 9095 Location: Romania

there is nothing under 1000 that has Quaife written on it.
_________________
Supercharger and EFI kits
https://www.the924.com

fiat22turbo · Joined: 18 Jan 2006 Posts: 4040 Location: Portland, OR

People swap the Audi V8 rear axle limited slips into their transaxles, so it wouldn't surprise me.
_________________
Stefan
1979 924 Carrera GTS (clone-ish)
1988 944 Turbo S (Silver Rose)

924RACR · Posted: Sun Nov 28, 2010 10:24 pm Post subject:

There was supposed to be someone (on the Pelican board I think) who was gonna check with Quaife or Guard, find out why they think the fitment is different.

Personally, having swapped in a 951 LSD into my 5-speed (in the racecar), I don't understand why they think there's a difference.

Oh, don't forget of course to budget another $800-1k for install in your box...
_________________
Vaughan Scott
Webmeister
'79 924 #77 SCCA H Prod racecar
'82 931 Plat. Silver
#25 Hidari Firefly P2 sports prototype

endwrench · Joined: 07 Dec 2002 Posts: 1631 Location: Victor, Montana

Ya, I remember the A8 diff thing. Basically a little machining to make it fit. I've periodically checked on buying a used one but are all pretty pricey. Quality piece though.

Vaughn, what fitment are you referring to? Someone checking on this already? Would appreciate any links or suggestions as to where to further investigate this possibility.

Cost of installation will be the same for any LSD but I figure most on this board are DIY'ers. Or at least the cheapskates like me! I would never pay that much for installation of used parts and I'm sure that is true for others. Should definitely not consider this rout. Just save your money for new.

Todd
_________________
'79 924NA. Rebuilt 9.5:1, MSDS header, Mega Squirt Injection, MJLJ-EDIS Ignition, 1.6L Whipple Charger and Intercooler, 10lbs Boost, 944 Trans, Custom HD Clutch.
"simsport" said....superchargers are better than turbos its official!....

engineer.white · Posted: Mon Nov 29, 2010 11:45 am Post subject: A4 diff

I think the A4 comes stock with a LSD in the center. The stock rear diff is open. So getting a junkyard rear diff from an A4 would not be limited slip.
David
_________________
1981 924 turbo/931
1982 924 turbo/931
1986 911 turbo/930

endwrench · Joined: 07 Dec 2002 Posts: 1631 Location: Victor, Montana

Crap!
_________________
'79 924NA. Rebuilt 9.5:1, MSDS header, Mega Squirt Injection, MJLJ-EDIS Ignition, 1.6L Whipple Charger and Intercooler, 10lbs Boost, 944 Trans, Custom HD Clutch.
"simsport" said....superchargers are better than turbos its official!....

931Owner · Joined: 14 Feb 2009 Posts: 352 Location: Chicago NW Suburbs

Some specs straight from Audiworld and a 97 A4

• 1.8 liter 150 hp turbo engine with direct ignition, electronic turbo (1.8T models only)
• 2.8 liter DOHC 172 hp V6 engine with variable intake valve timing and intake manifold path (2.8 models only)
• 5-speed manual transmission with synchronized reverse gear
• "FrontTrak" drive system with front wheel drive, 4 link front suspension and ASR (anti-slip regulation) system (not available on Avant models)
• "quattro IV" - permanent all-wheel drive system, includes TORSEN torque sensing center differential; front and rear electronic differential locks (EDL)
• Anti-lock brake system (ABS 5.3) with electronic differential lock (EDL) and electronic rear brake pressure regulation
• ASR (Anti-slip Regulation) system (full time traction control; Fwd only)
• CFC-free air conditioning refrigerant
• Fully galvanized steel unibody construction with aluminum hood
_________________
1980 Turbo
-too many cars and too many motobikes

endwrench · Joined: 07 Dec 2002 Posts: 1631 Location: Victor, Montana

Ooooh! Electronic Diff Lock. That could be interesting. Some of my research seems to show all the 2002 or newer A4's came standard with LSD of some sort but nothing definitive.
_________________
'79 924NA. Rebuilt 9.5:1, MSDS header, Mega Squirt Injection, MJLJ-EDIS Ignition, 1.6L Whipple Charger and Intercooler, 10lbs Boost, 944 Trans, Custom HD Clutch.
"simsport" said....superchargers are better than turbos its official!....

924RACR · Posted: Mon Nov 29, 2010 11:12 pm Post subject:

You're not gonna have "electronic diff lock" unless you install and tune an ABS system with traction control - 'cause that's what it is.

This isn't the manually-selectable locking diff, like you'd find on an off-road vehicle; it's simply another name for a type of brake traction control.

Regarding the install fee: don't think you're gonna DIY and get that sucker installed properly without the proper gauges/measuring equipment, tools, etc. It's about 8 hrs with the correct gear, hence the cost. This is necessary to properly set the bearing free-play on the diff bearings, not to mention properly locating the diff in the housing. Royal PITA.
_________________
Vaughan Scott
Webmeister
'79 924 #77 SCCA H Prod racecar
'82 931 Plat. Silver
#25 Hidari Firefly P2 sports prototype

morghen · Joined: 21 Jan 2005 Posts: 9095 Location: Romania

Rich H · Posted: Mon Nov 29, 2010 11:58 pm Post subject:

Nah, get another audi box, slap the LSD in by eye and have a go.

If the bits are cheap then try it out...

Setting the diff up is a job for engineering blue and some shims to get the crown and pinion set up, in theory it isn't that hard...
_________________
1994 Lotus Esprit S4 - Work in progress...
1980 Porsche 924 S2 DITC Turbo - Original spec
1978 Homo-Sapiens - Tired spec
1953 Landrover S1 - Pensioner Spec

morghen · Joined: 21 Jan 2005 Posts: 9095 Location: Romania

endwrench · Joined: 07 Dec 2002 Posts: 1631 Location: Victor, Montana

I've set up plenty of diffs and trannys. Pretty sure I can bluff my way thru another

.

Sorry to hear about the "electronic diff". Sure wish car makers could use the same descriptions.
_________________
'79 924NA. Rebuilt 9.5:1, MSDS header, Mega Squirt Injection, MJLJ-EDIS Ignition, 1.6L Whipple Charger and Intercooler, 10lbs Boost, 944 Trans, Custom HD Clutch.
"simsport" said....superchargers are better than turbos its official!....