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[tech] 4K vs 9a question was: What tranny is this?

Subject: [tech] 4K vs 9a question was: What tranny is this?
From: amalventano1@comcast.net (Allyn)
Date: Sun, 07 Apr 2002 12:40:46 -0400
References: <20020407143142.ODVD15826.rwcrmhc54.attbi.com@rwcrwbc56>

i'll try to answer this better than jason just did :)
    closer ratio means you are able to keep your engine closer within the power band peak area. take
the rieger for example, it has an FN tranny, which is about the widest ratio you can do. i have to
stay away from mods that remove low end torque (50mm intake, etc), since i get 2000-2500 rpm jumps
between gear shifts. this means i get a nice cruising-mobile, but i have to keep my torque band
wide. if i dont keep it wide i'll get decemated by the hondas around here, and we cant have that
now, can we?
    now i could go for the high peak if i wanted to, but i would have to go close ratio to get max
potential from the engine/tranny combo. this is why people spend thousands to get a 4k fitted with a
6 speed. that gets you the close ratio as well as getting rid of your highway buzziness.
Al

Allyn Malventano, ETC(SS), USN
87 Rieger GTO Scirocco 16v (daily driver, 170k, rocco #6)
86 Kamei Twin 16V Turbo Scirocco GTX ('it has begun', rocco #7)
87 Jetta 8v Wolfsburg 2dr (daily driver, 260k, 0 rattles, original clutch, driveshafts, wheels :)

----- Original Message -----
From: <pbureau@attbi.com>
To: <scirocco-l@scirocco.org>
Sent: Sunday, April 07, 2002 10:31 AM
Subject: [tech] 4K vs 9a question was: What tranny is this?


> To throw my 5 cents worth, I have an 85 (09/84
> production date) and it is a JH Engine with a 9A
> tranny. I beleive the 4K production line finished in 84
> and 9A started in 85 production lines. the only
> difference between a 4K tranny and a 9A tranny is the
> final drive btw.
>
> why state the 4K being a they are the performance
> tranny on a vw when the 9a produced more MPH ??
>
> 4Y, 9A, ACD, AEN (8v Close Ratio)
> 3.67 3.45 2.12 1.44 1.13 0.89
>
> 4K
> 3.94 3.45 2.12 1.44 1.13 0.89
>
> just to compare number in a more "realistic" way
> here is a run down on each tranny on 205.50.15 @5000rpm
> on each gear...the result was calculated by
> scirocco.org "gear" sheet. here are the recorded results
> @5000 RPM
> Tranny   4k     9A
> 1rst    25MPH  27MPH
> 2nd     41MPH  44MPH
> 3rd     60MPH  64MPH
> 4th     77MPH  82MPH
> 5th     97MPH  105MPH
>
>
> THe 9a tranny WOULD be the tranny to have over the 4k,
> unless I am NOT understading the physic of
> transmissions, can someone enlightent me without
> bashing my head into a cement wall and setting my arse
> in fire okay?
>
> Thanks for Technical information here...
>
> ATS - Patrick Bureau
>
>
>
> ATS - Patrick Bureau
> 'HWB2002 - HouSton TX'
> > AFAIK all 020 tranmissions (as in all the tranmission specific part numbers
> > are of the format 020 XXX XXX) have the same drive flange seals, so this
> > shouldn't be a big issue. Have you been identifying them as drive flange
> > seals or output shaft seals? That may be the confusion. 84 is a good year to
> > identify the 4K.
> > Also, AFAIK the 1.8 L MK II Scirocco only came with the 4K tranny until they
> > switched over to the 9A. For sure that happened sometime in 86, but it may
> > have happened earlier.
> > The 4K is THE performance transmission for the Scirocco. If cruising down
> > the highway at high RPM bothers you, you can change out 5th (currently .89)
> > to a .80 or .75 or .71 gear. It's as durable as any 020 gearbox. Mine has
> > 225K miles of hard use.
> > Dan
> >
> > ----- Original Message -----
> > From: Robbie Cotner <robw_z@yahoo.com>
> > To: <scirocco-l@scirocco.org>
> > Sent: Saturday, April 06, 2002 2:38 PM
> > Subject: What tranny is this?
> >
> >
> > > For all I know this question is extremely stupid, but
> > > I haven't been able to find the right output shaft(or
> > > drive flange) seals for my scirocco.  The tranny is
> > > out of a Rocco with a production date of 3/84, and on
> > > the case is stamped -4K12034-  Inside the bellhousing
> > > it says -020 301 107 H-  It also says -11a WWO- but
> > > that looks unimportant.  Is this the car's original
> > > tranny?  Everyplace I've gone to and asked for an
> > > output shaft seal, I get the wrong size(can't recall
> > > if it was too big or too small).  So I either need to
> > > know what year this tranny is, or what year I should
> > > tell NAPA(or others) my tranny is(Manipulation
> > > sometimes required when going to places like that)
> > > last but not least, is this considered a "good" tranny
> > > model.  How durable are they, this one already has
> > > 170k on it.  Thanks in advance-
> > > Rob
> > >
> > > __________________________________________________
> > > Do You Yahoo!?
> > > Yahoo! Tax Center - online filing with TurboTax
> > > http://taxes.yahoo.com/
> > >
> > > _______________________________________________
> > > Scirocco-l mailing list
> > > Scirocco-l@scirocco.org
> > > http://neubayern.net/mailman/listinfo/scirocco-l
> >
> >
> >
> > _______________________________________________
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> > Scirocco-l@scirocco.org
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>
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References:
- [tech] 4K vs 9a question was: What tranny is this?
  - From: pbureau@attbi.com (pbureau@attbi.com)

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