Re: 4K or AGB?

["Victor Farren" <vfarren@rrs.cdie.org>]

I would keep the AGB and put that in.  I believe the 16v tranny is sturdier than than the 4k.  I know it is quieter.  I had a 4k in my 8v and now I have a 16v w/ the AGB.  I like it.  Keep it.  The thing to consider is that the AGB takes 100 mm CV joints while the 4k takes 90mm CV joints.  If you were going to put this in your 79, it has the 90 mm.  You would either need to make a frankenstein shaft w/ 100mm on inside and 90mm on outside, or you would need to do some work to where the CV joint mates up with the wheel.  Sorry for lack of tehcnical terms, but its first thing in the morning and I can't think too well.

There was a reent discussion on the list about doing that.  Below is one of the threads.  You might want to contac these people.
Victor

On Fri, 25 Feb 2000 02:48:41 EST BFDEIHL@aol.com writes:
> I have done this swap. (90 to 100mm).  I ended up using later model 
> Cabriolet hub carriers due to the interference problem with the larger 
> shoulder of the 100mm CV.  The 1981 hub carriers I had would not permit
the > use of the larger joint without locking up.  It just wouldn't work.

Like I said before, it did the same thing on my '83 GTI and as you
tighten the axle nut, it starts to bind right between the CV joint and
the housing.
Btw, on your hub carriers, the passenger side is from an '85 Scirocco and
the driver's side is from an '87 16V Scirocco. 8^)

> Later, I read the Bentley manual for the 85-93 A1s (Cabriolet and 
> Scirocco),  and lo and behold, there on Page 10-13, is a reference to
the 
> increased shoulder diameter of the later CVs causing interference
problems. 
Excerpt from '85-93 A1 Bentley:
Revised late model CV joint. On the 1985-1987 models the dimension a is
50 mm. On 1988 and later models and on replacement CV joints, dimmension
a is 53 mm. 
Btw, "a" is the dimmension on the CV, that will interfere with the pre
'85 wheel bearing housing/hub carrier.

> According to Bentley, the newer CV requires a new design retainer 
> CIRCLIP.  
> YOU MAY BE RIGHT about the hub carriers being the same (I really 
> never checked part numbers), but the CIRCLIP is certainly different,
and 
> may be all that is needed for clearance.
No...
 
> As I didn't TRY just the circlip swap, I wouldn't swear that just 
> swapping to the later model circlip is all that is needed for
clearance. I do 
> know that swapping out the entire carrier worked...
The circlip swap only applies to '85-87 Sciroccos and Cabriolets.
The '85 and up, wheel bearing housings/hub carriers are physically
larger, than the '79-84 1/2, and you can actually see the difference.
According to Volkswagen they are different for '85, the left side is 171
407 255B and the right side is 171 407 256B, and they are only $351 each.


Peter
'79 Scirocco 16V project car, 100mm/53mm
'80 Scirocco, 90mm/?mm
'88 Scirocco 16V, 0mm/0mm
'83 GTI, daily driver, 100mm/53mm      






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