[urq] rear diff sealing

Wed Mar 21 15:58:41 PDT 2012

I have not BTDT myself but I hear the torsen diff itself will not fit the
early one piece diffs.
If someone else tried maybe they can chime in.

Cheers
Martin Pajak

http://www.quattro.ca 

1982 Audi Ur-quattro, SQ project
1983 Audi 80 quattro, Euro 2-Tür
1984 Audi Ur-quattro, 20vt with 6-speed
1993 Audi 90 CS quattro, 2.5 TDI with 6-speed

-----Original Message-----
From: audiqtrocp [mailto:audiqtrocp at aol.com] 
Sent: 21-Mar-12 13:51
To: Martin Pajak
Cc: Mike Sylvester; urq; Ben Howell; urq Audifans
Subject: Re: [urq] rear diff sealing

What excludes this from being done to the early one piece diffs?

Sent from my iPhone for, the one with the bigger Gee Bee's

On Feb 12, 2012, at 10:49, "Martin Pajak" <martin at quattro.ca> wrote:

> Hi Mike,
> 
> You are not changing the crown and pinnion which should always stay as 
> matching set.
> You are just changing the the diff gears (torsen unit replaces the 
> spider gear assembly).
> To do this properly, yes, you should have the diff reshimmed, however 
> plenty of people have done it without reshimming (myself included) 
> without a problem.
> 
> Hope this helps
> 
> Martin Pajak
> 
> http://www.quattro.ca
> 
> 1982 Audi Ur-quattro, SQ project
> 1983 Audi 80 quattro, Euro 2-Tür
> 1984 Audi Ur-quattro, 20vt with 6-speed
> 1993 Audi 90 CS quattro, 2.5 TDI with 6-speed
> 
> 
> -----Original Message-----
> From: Mike Sylvester [mailto:mike at urq20v.com]
> Sent: February-12-12 1:24 PM
> To: Martin Pajak; 'urq'; 'Ben Howell'; 'urq Audifans'
> Subject: RE: [urq] rear diff sealing
> 
> Or is the difference just that they are a mated pair and you don't 
> want to mix and match?
> 
> Mike
> 
> www.urq20v.com
> 
>> -------- Original Message --------
>> Subject: Re: [urq] rear diff sealing
>> From: "Mike Sylvester" <mike at urq20v.com>
>> Date: Sun, February 12, 2012 11:07 am
>> To: "Martin Pajak" <martin at quattro.ca>, "'urq'" <urq at pacbell.net>, 
>> "'Ben Howell'" <bhowell at rmi.net>, "'urq Audifans'" <urq at audifans.com>
>> 
>> 
>> Martin,
>> 
>> I'm glad I read that write-up as I was not aware that the ring gear 
>> is different.
>> It looks the same, but I guess it wouldn't take much.
>> 
>> Mike
>> 
>> 
>>> -------- Original Message --------
>>> Subject: RE: [urq] rear diff sealing
>>> From: "Martin Pajak" <martin at quattro.ca>
>>> Date: Sun, February 12, 2012 8:15 am
>>> To: "'urq'" <urq at pacbell.net>, "'Ben Howell'" <bhowell at rmi.net>, 
>>> "'Mike Sylvester'" <mike at urq20v.com>, "'urq Audifans'"
>>> <urq at audifans.com>
>>> 
>>> 
>>> Steve,
>>> 
>>> The torsen diff will only go into the new style 4kq diff housing.  
>>> Sorry, no way to retain locking capability.
>>> The good news is that the V8 diff comes with large 110mm flanges so 
>>> it will bolt into the Ur-q without issue.
>>> 
>>> Here is a writeup on MG by Justin, I did it myself and took less 
>>> than 2 hours to complete the swap (including oven time).
>>> http://www.motorgeek.com/viewtopic.php?f=6&t=10133&start=275
>>> My swap was into a 115hp 4kq so I did not feel any difference when 
>>> completed, plan was for some more power but sold the car before I 
>>> had a chance to experiment.
>>> 
>>> HTH
>>> Martin Pajak
>>> 
>>> http://www.quattro.ca
>>> 
>>> 1982 Audi Ur-quattro, SQ project
>>> 1983 Audi 80 quattro, Euro 2-Tür
>>> 1984 Audi Ur-quattro, 20vt with 6-speed
>>> 1993 Audi 90 CS quattro, 2.5 TDI with 6-speed
>>> 
>>> 
>>> -----Original Message-----
>>> From: urq-bounces at audifans.com [mailto:urq-bounces at audifans.com] On 
>>> Behalf Of urq
>>> Sent: February-12-12 2:03 AM
>>> To: 'Ben Howell'; 'Mike Sylvester'; 'urq Audifans'
>>> Subject: Re: [urq] rear diff sealing
>>> 
>>> ... I had heard that it was originally developed for some sort of 
>>> aircraft engine application.  I had a bit of difficulty getting the 
>>> first tube, and it wasn't cheap ... it seems more plentiful and 
>>> cheap now ... but it seems that there may be more than one variety.
>>> 
>>> All I know was that I read the specs on the Permatex site ... 
>>> non-hardening and tolerant of automotive lubricants, not acidic 
>>> either.  It seems to me this would be a good alternative ... in fact 
>>> I did a quick check and confirmed that it was originally designed 
>>> for
> Rolls-Royce aircraft engines:
>>> 
>>>    
>>> http://www.hylomar.com/index.php?option=com_content&view=article&id=
>>> 64&Itemi
>>> d=138
>>> 
>>> Hylomar Universal Blue, that is what I would recommend.  As noted, 
>>> it was recommended on the
>>> 
>>> ... now, I'd love to hear more about how to swap a V8Q rear Torsen 
>>> into an ury's rear pumpkin ... and whether or not there's a way I 
>>> can retain the locking dogs ...
>>> 
>>> Steve Buchholz
>>> 
>>> -----Original Message-----
>>> From: Ben Howell
>>> Sent: Saturday, February 11, 2012 8:32 PM
>>> Subject: Re: [urq] rear diff sealing
>>> 
>>> My understanding of Hylomar (from my RX-7 ownership days) was that 
>>> is was developed specifically for use in o-ring sealing 
>>> applications. Supposedly Mazda was having a heck of a time getting 
>>> the large o-rings in-between rotor housing to seal and someone 
>>> developed Hylomar for them and it worked like a charm.....but only 
>>> in
> o-ring applications.
>>> 
>>> Ben
>>> 
>>> -----Original Message-----
>>>> From: Steve Buchholz
>>>> Sent: Feb 11, 2012 8:21 PM
>>>> Subject: Re: [urq] rear diff sealing
>>>> 
>>>> The first thing that came to mind is the sealant I used for my old 
>>>> CB700SC
>>> engine, called Hondabond ... I see it mentioned on the Rennlist too. 
>>> This is apparently like Permatex grey.  Then I remembered some stuff 
>>> I used on the urq long ago called Hylomar.  This stuff is non 
>>> hardening and is now supplied by Permatex too. Were I in your 
>>> position, I'd go with the blue stuff.
>>>> 
>>>> Steve Buchholz (mobile)
>>>> 
>>>> ----- Reply message -----
>>>> From: "Mike Sylvester" 
>>>> Date: Sat, Feb 11, 2012 11:01 am
>>>> Subject: [urq] read diff sealing
>>>> 
>>>> Audi uses some sort of green sealant on the side cover as there is 
>>>> no gasket.
>>>> When you guys open it up to swap in the V8 torsen diff, do you 
>>>> reseal that with something?
>>>> 
>>>> Mike
>>>> 
>>> 
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>> 
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> 
> 
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