[torsen] RE: [s-cars] RE: Generations of quattro

Smith, Kirby A kirby.a.smith at lmco.com
Mon Feb 12 10:15:05 EST 2001


I would supplement this with ur-S4 MY 1994 and ur-S6 MY 1995 used the
torsen/lockable rear.  The EDL MY 1995.5 were built in late '95 I think and
sold in '96.

kirby

> -----Original Message-----
> From:	qshipq at aol.com [SMTP:qshipq at aol.com]
> Sent:	Sunday, February 11, 2001 13:49
> To:	torsen at audifans.com
> Cc:	quattro at audifans.com; s-car-list at yahoogroups.com; urq at audifans.com;
> v8 at audifans.com
> Subject:	[s-cars] RE:  Generations of quattro
> 
> Rob Beatty wrote
> Whole bunch o stuff chopped....
> 
> >Question is....
> 
> >Whats Gen 1 and whats Gen II, ie whats the model cutoffs (i'm assuming
> the
> >UrQ is Gen 1, but how about the rest of the Audi line?)
> 
> I'll do my best to catagorize this to include most of the subtle
> differences 
> as well as the basics.  Please note this is *USA APPLICATION ONLY* (Europe
> 
> introduced ABS updates on older chassis earlier, the usa never had abs
> urq's, 
> etc.), some M/MY had vin splits on application:
> 
> Pre 1984 
> Gen IA = early urq's and 4kq's used a single knob, which manually locked
> both 
> the center diffs and the rear diffs simultaneously
> 1a did not include ABS function
> 
> 1984>1987 (exceptions Gen 1C)
> Urq/4kq/
> GEN IB = later urq's and 4kq's used a single knob (2 detents) or rotary 
> switch to control the diffs as follows:
> Position 1 = center diff on
> Position 2 = center and rear diffs on
> 1B did not include any ABS function
> 
> 1985-1986>1988
> 5ktq/5kq/4kq
> GEN IC = includes all gen 1B
> Positiion 1 = Center diff on 
> Position 2 = Center/Rear diff on 
> All Gen 1C used rotary style knob, all models
> ABS Auto disable when either center or center/rear locked
> ABS defeat switch on dash
> 
> 1988/1989>1993
> 80/90/200tq/urS4
> GEN IIA = Introduction of Torsen center differential, rear locker, 1988
> with 
> the 80 series sedan, type 44 intro in 1989MY, all UrS4
> Center Torque Sensing differential, rear locking differential with 
> electro-pnuematic rear actuator with 15mph cutoff.
> ABS = Bosch 3 channel
> ABS disable with rear differential locked
> ABS defeat switch on dash
> 
> 1989-1994
> v8 only
> GEN IIB
> computer controlled clutch plate center differential (early auto), Torsen 
> center (manual and later auto)
> Rear torsen differential (all v8)
> 3 channel abs
> 
> **  As of 1994 the rear locking differential was deleted (all models) in 
> favor of 2x2 channel electronic traction control (included 4 channel abs) 
> with open front and rear diffs**.  Audi also fell to market/liability 
> pressure and deleted the ABS disable switch on the dash
> 
> 
> 1995>1999
> S6/A4/A6/A8
> GEN IIIA
> Torsen center diffential with ABS IV Electronic Differential Locking
> traction 
> control (2 channel only, both fronts or both rears, 40mph disable)
> Open front and rear differential
> 4 channel ABS
> 
> 2000>
> A4/S4/A6/A8
> GEN IIIB
> Torsen center differential with Bosch EDL version 5.3 traction control
> with 
> Electronic Stability control
> Open front and rear differentials
> 4 channel abs
> 
> 1999>
> TT
> Gen IV 
> Haldex hydraulic synchro type center locking differential, 2channel EDL
> and 
> ESP 
> Open Front and rear diffs 
> 4 channel ABS
> 
> HTH
> 
> Scott Justusson
> QSHIPQ Performance Tuning
> Chicago IL
> 
> 
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> 
> 



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