[urq] 83 Urq tranny compatibility w/4kq?

[Ingo Rautenberg]

Steve,

I was thinking about this as well, but do realize that IMO the  
gearing of the 4kq, while appropriate for the 4kq, is not optimized  
for the Urq and it's turbo motor.  Remember, the 4kq had a top speed  
of ~115 mph.  Plus it'd be pretty buzzy at cruising speed...

I'd stick with the tranny you have or one from a non-turbo 5kq.

Ingo

On Jun 11, 2007, at 4:14 PM, urq wrote:.

> ... I just realized that I do have a '84 4kQ tranny in the garage,  
> and I'm
> going top need to figure out what's up with the clutch on my  
> car ... so I
> thought I'd pose this question to those on the list who may have  
> experienced
> both flavors ... perhaps I should swap the transaxle at the same  
> time ...
>
> I'm sticking with the WX engine (at least for the near term) ... is  
> the
> performance of the car better with the 4kQ tranny or should I stick  
> to the
> one I have?
>
> ... is it known for a fact that the FDR of the '84 4kQ tranny is  
> different
> from that of the urq?  I know this has been discussed ad nauseum  
> before, but
> ISTR that the final result was that they were the same.  If the 4kQ is
> indeed 4.11:1, it would be an opportunity to swap in the V8 Torsen  
> rear diff
> ... I just had a 4kQ prop shaft next to one for a 5-speed V8Q and  
> the 4kQ
> shaft is a couple inches longer.  Has anyone swapped a rear Torsen  
> onto an
> urq?  What prop shaft did you end up needing?
>
> TIA!
> Steve B
> San José, CA (USA)
>
> -----Original Message-----
>
> Louis-Alain,
>
> You basically covered it nicely.
> The only other difference is that the 4kq tranny has small output  
> flanges
> while Ur-q has the large ones, but that's just a matter of swapping  
> out of
> your original.  Also, starting '84 the bellhousing has a notch to  
> clear the
> new style MC/3B/AAN flywheel sensors.
>
> Hope this helps.
>
> Martin Pajak
>
>
> -----Original Message-----
>
> Swappable, sure. Physically at least.
>
> But there is some difference:
>
> - Final drive ratio, 3.89 for the urQ, 4.11 for the 4kq.
> - Some gears are different, as the 1983 urq has very short first  
> and second
> gears, then a hole, then 3-4-5 are closely spaced. To resume, urq  
> 1983's are
> 6 speed gearbox missing the 3rd... 4kq are better, more envenly  
> spaced.
>
> I forwarded this message to Martin Pajak, he's THE reference for  
> this kind
> of question.
>
> Martin ?
>
> Louis-Alain
> 1983 Quattro
>
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