[urq] rear diff sealing

Wed Mar 21 16:07:07 PDT 2012

I'm pretty close to attempting it, that's why I ask

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

On Mar 21, 2012, at 15:58, "Martin Pajak" <martin at quattro.ca> wrote:

> 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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> 