Re: Trans cooler transfusion confusion

["Stephen Bigelow" <sbigelow@sprint.ca>]

Sticker says RDG was original....a 3.45 gear. No qualms about going to a
longer gear.

There are already to holes at the side mounted cooler location...both blind,
and one tapped and plugged.

I want to know if I can drill, and drill and tap, respectively, these holes
and use the diff.




>What is/was the original?
>Per Bentley the REE came with a "return flow 5-row" cooler.
>The REE also has taller 3.08 final drive gears as compared to the lower
3.45
>final drive gears for the RDN or RDG, more top end but slower off the line.
>I don't know the fluid circuits in the trans to be able to say if it will
or
>won't work. Maybe I am overly conservative but I would be hesitant to try
it
>without knowing more than I do.
>I think the Bentley manual may be referring to the fluid flow to and from
>the torque converter (major heat source). If there is an fluid passage in
>the diff housing you could tap into you would have to tap into two places
>and plug it in between to force fluid to flow through the cooler.
>I would suggest a complete trans or the correct diff .
>>From my experience at the dealership the trans with the rear mounted
coolers
>were less trouble.
>Good Luck
>Jim Dupree
>
> -----Original Message-----
> From: Stephen Bigelow [mailto:sbigelow@sprint.ca]
> Sent: Tuesday, October 26, 1999 4:34 PM
> To: Dupree, Jim; quattro
> Subject: Re: Trans cooler transfusion confusion
>
> The new diff is a REE 30 11 9.
>
> I posted this because originally, I got some private posts
>that it _was_
> possible.
>
>
>
>
> >You are trying to mix to different generations of transaxle
>into one,
> >probable a bad idea. On the bell housing of the trans is a
>trans code, it
> is
> >3 letters followed by 5 numbers by the upper right bell
>housing bolt. I.E.
> >RDG  08  03 5 which means an RDG trans produced 08 day of
>the 03 month of
> >the 1985 . According to Bentley you could have a RDG (10/82
>- 12/83 prod)
> or
> >a RDN (01/84 -> prod) transmission.  The RDG has a
>"recirculating system
> >3-row" cooler and the RDN has a "supply flow 3-row" cooler.
>Of course there
> >is a footnote, the RDN as of 4/10/85 has a 5-row cooler. If
>the housings
> had
> >the same fluid passages you could conceivable install both
>coolers and
> plumb
> >them into the coolant hoses but I doubt I would try it.
>Audi trans coolers
> >are know to fail and 2 would double your chances of
>failure.
> >Jim Dupree
> >
> > -----Original Message-----
> > From: Stephen Bigelow [mailto:sbigelow@sprint.ca]
> > Sent: Tuesday, October 26, 1999 12:34 PM
> > To: quattro
> > Subject: Trans cooler transfusion confusion
> >
> > Got a differential to repalce the busted one, but it looks
> >like the
> > replacements cooler was on the rear of the trans, and mine
> >is on the side.
> >
> > I see one (the aft one) plug for the cooler, and ...that's
> >all. The forward
> > hole seems like a blind, untapped hole.
> >
> > Is it possible to convert a rear cooler diff to a side
> >cooler diff?
> >
> > Drill and tap?
> >
> > HALP!
> >
> > Steve Bigelow
> > 84 5000S
> >
> >
>
>