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Re: FAQ (DHill)

Quote, originally posted by DHill »

Q: Can I convert my Mk3 to Syncro?
A: Yes. The rear end "bolts right up" with the appropriate brackets.

What brackets does one need? I have both a 94 Golf and 92 B3 Syncro wagon. I have considered putting the 1.8T into the Golf with the syncro swap.
 

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Re: FAQ (DHill)

Quote, originally posted by DHill »

Q: Can I convert my Mk3 to Syncro?
A: Yes. The rear end "bolts right up" with the appropriate brackets



I'm going to be spending a few months in Germany this summer, and if I find/afford the parts, what would I need to get? (aside from rear susp, prop shaft, fuel tank..yada..yada..yada)
 
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Re: FAQ (kish53a)

Quote, originally posted by kish53a »


I'm going to be spending a few months in Germany this summer, and if I find/afford the parts, what would I need to get? (aside from rear susp, prop shaft, fuel tank..yada..yada..yada)

This might give you an idea:





 

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Re: (Samzik)

Quote, originally posted by Samzik »
q: Ok one question i didnt notice here is : can one put torsen diferential to 02M gearboks replacing front dif making it limited slip. Then use all the haldeks godies/parts to get the rear work. Then on rear, use audis lockable dif ? That would be ultimate funcar to drive in winter and slipy conditions! Cos fronts are driven by torsen and they always try to grasp the road, center is controlled by haldeks meaning 100%front/0% back to 50/50 max. And if needed the back dif can be locked for driving in ice or running 1/4 mile.
I am told the torsen dif is to big and wount fit in haldeks gearboks is this true?

[*******]PLEASE POST NEW QUESTIONS AS A THREAD IN THE SYNCRO/4MOTION/QUATTRO FORUM... IT KEEPS THE CLUTTER AWAY!![/size]

Quaife makes an 02M limited slip. Bildon carries it, and a search on Google for "02M Quaife" will return a few hits.
http://www.bildon.com/catalog/...Nav=5
http://www.nolimitmotorsport.com/prod/10-309-195
Peloquin makes one for the 02M as well.
http://www.tyrolsport.com/vwperformance.htm
http://shop.fixxtuning.com/s.n...42/.f
Both of the above-mentioned LSDs are for the front in 4Motion 02M car like the R32.
Google really is your friend.


http://technikmotorsport.com/e...c8859
http://www.evwparts.com/Mercha...pDiff




Modified by DHill at 10:43 AM 7-5-2005
 

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Discussion Starter #28
Re: FAQ (yellowslc)

Haldex Pinouts:
T8 - Socket between car and control unit
T8/1, Red = Ign.
T8/2, Black = Gnd.
T8/3, White = BLS (brake light switch)
T8/4, Blue = HBLS (hand brake light switch)
T8/5, Brown = K-line (diagnostics)
T8/7, Blue/Grey = CAN low
T8/8, Blue/Orange = CAN high
T2 - Socket between control unit and feeder pump(pwm switched voltage)
T2/1, Yellow = Pump 1
T2/2, Yellow/Black = Pump 2
 

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Re: FAQ (Yellow_bunny)

Quote, originally posted by Yellow_bunny »
Q: does anyone have the diff ratios of the audis and the syncros and also gear ratios?

Wow.
Which Audi's?? (they made alot of them)
On the ur quattro it was the following.
pre-'84
1st 3.6:1
2nd 2.125:1
3rd 1.360:1
4th 0.967:1
5th 0.778:1
Some criticism was brought up on how far apart the gears were (if you drove the car you'd know)
So in '84 they changed them to
1st 3.6:1
2nd 2.125:1
3rd 1.458:1
4th 1.071:1
5th 0.778:1
Diff ratios would be 1:1..right????
 

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Re: FAQ (Sepp)

ok do u know the ratios of the syncro trannys?
i took apart a torsion rear diff from an early 90's audi v8 and the diff ratio is 4.11:1
does anyone have the ratio of the syncro rear diff?
 

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Re: FAQ (Yellow_bunny)

All 4 cyl Golf/Jetta/Passat syncros have a 20/21 & a 21/20 tooth count on the angle drive and the rear diff. This effectively gives a 1:1 ratio through the system since one gearset cancels out the other. The rear diff on it's own gives a reduction of 1.05:1
On VR6 syncros, the tooth count is 21/16 for the angle drive & 16/21 for the rear diff, which is a 1.31:1 ratio.
Haldex systems are 27/17 & 17/27, giving a 1.59:1 ratrio per set.
 
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Re: FAQ (1.8TsyncroB3)

Quote, originally posted by 1.8TsyncroB3 »
All 4 cyl Golf/Jetta/Passat syncros have a 20/21 & a 21/20 .....


Just a little note, the early B5 Passat's AWD were called SYNCRO in Europe

But true all the A2/A3 style (like the B3/B4's are) syncro's are share the two mentioned versions.
 

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Re: FAQ (DHill)

Quote, originally posted by DHill »
Diagrams from Les. I will eventually host these on my own server for backup, but these are informative for the person who is looking for these things.



There's an error in this diagram- There is no "center" diff in a Vanagon syncro system. The front prop shaft is driven directly off the front of the main shaft. All "center diff" chores are handled by the VC.
 

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Re: FAQ (1.8TsyncroB3)

Step by step description of the function of a Torsen differential
Things to know before we start
1. Do a Google Images search for "Torsen". It is very educational.
2. Realize that there are two sides to the Torsen. The helical gear in the middel is actually two helical gears - one for each output shaft. The "pairs" of Invex (or "worm") gears aren't really pairs. There are three to one side and three to the other. Look at it as a two-sided unit.
Like this!

3. The ring gear is attached to the housing and is not generally considered to be part of the differential. Sometimes the differential housing is spun via a chain, or in this case, a bevel gear meshing with a ring gear. The ring gear bolts on to the outer ring.
Now, let's begin:

Mesmerize yourself by staring at this diagram:

Ignore the arrows for the moment.
1) Rotate the shaft on the left counter-clockwise (CCW) - I like to pretend I'm turning it with my left hand.
2) The helical gear (splined directly to that shaft - just inside the housing) will now be rotating CCW.
3) The top Invex gear (or worm gear) is now rotating CCW about its journal pin (the pin through its axis).
4) Since that Invex gear is rotating CCW, the one right next to it is rotating clockwise (CW).
5) Since that Invex gear is rotating CW, so is the helical gear (on the other side) to which it is meshed. Thus, the other shaft is rotating CW.
Ta da! CCW on the left = CW on the right.
To take it one step further, see what happens when you rotate the housing and watch the gears inside. Pretend you are a little man sitting on the housing, rotating with it. As long as there is no applied torque to either shaft, both shafts and housing rotate in the same direction at the same speed. From your perspective as the little man, nothing is happening inside. All gears are stationary.
Now if one of the output shafts spins faster than the other (such as in wheel slip or turning) from your perspective as a little man on the housing, things will start to happen. You will see one shaft rotating CW and the other rotating CCW, with all the Invex gears rotating as described above. It actually isn't much different than an open differential, except the Torsen has a much greater sum of frictional forces between gears than an open diff, thus "limiting slip" between axles.
Other Torsen pics:
Careful... this pic is HUGE!
http://climeg.poliba.it/~mecap...1.jpg
See how it sits inside the transmission?

A T1 Torsen diff as it comes from the factory. Note: No ring gear is attached! That's for you to do!

Sometimes the input shaft to the housing is hollow, sleeved over one of the output shafts. Makes the longitudinal transmission as compact as it can possibly be.

Not many moving parts, really.


Autozine is the best:

Here is what it would look like if it were chain-driven with a sprocket:

I thought this was hilarious. A LEGO interpretation of a Torsen diff.


Now, if you wanted to see a very literal interpretation of a limited slip differential, here it is. It's an open diff with essentially a viscous coupling on either output shaft. This is supposedly a differential made by Kaaz and it is used in Nissan vehicles, I think.





Modified by DHill at 3:11 PM 12-9-2005
 

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Re: FAQ (DHill)

The questions, misconceptions, and answers I found about AWD

Audi Torsen transmission designs:
http://forums.vwvortex.com/zerothread?id=2336254
Finding out what's in the new Mazdaspeed 6
http://forums.vwvortex.com/zerothread?id=2175261
Wondering what the Touareg drivetrain looks like:
http://forums.vwvortex.com/zerothread?id=2020857
Available transmissions for Audi:
http://forums.vwvortex.com/zerothread?id=2060883
When I first started looking at a way to beef up the Syncro:
http://forums.vwvortex.com/zerothread?id=1812800
Learning about the best places for new automotive technical info:
http://forums.vwvortex.com/zerothread?id=1935311
Questions about bolting an 02C to a VR6
http://forums.vwvortex.com/zerothread?id=1843317
A not so useful thread about putting that power to all 4 wheels:
http://forums.vwvortex.com/zerothread?id=1558961
Cryo treating gears?
http://forums.vwvortex.com/zerothread?id=1586268
My early questions about Syncro:
http://forums.vwvortex.com/zerothread?id=1434256
 
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