05/11/2006  low-fanglers' mailing list
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  I just discovered that most of the 4Tx0 GM automatic transaxles have 
several drive chain ratios.  The differential is a planetary and only 
one or two ratios is commonly available; they do the main "gear ratio" 
with the drive sprockets.  Changing the chain looks like it requires a 
complete transaxle disassembly, though.

  The differential housing holds the pinions.  One pinion connects to 
the left wheel, the other to a shaft that runs all the way through the 
transmission to the right wheel.  The rest of the transmission shafts 
are hollow and spin around the axle shaft.

  The side of the differential housing has shafts for the pinions of the 
planetary differential, which wraps around the transmisison shaft and 
anchors to the housing.

  Looking at the way the differential works, if you ground out the teeth 
on the ring gear, then welded the pinions to the sun gear, you would 
then have a 1:1 final drive and the differential would still differentiate.

  With a 1:1 drive, you could position the transaxle longitudinally in a 
midships-engine car and run shafts forward and back to ordinary 
differentials for 4wd.

  I wish I'd found this out a few years ago...

</pre>
<hr>
John replied:
<pre>
> >  With a 1:1 drive, you could position the transaxle longitudinally in a 
> > midships-engine car and run shafts forward and back to ordinary 
> > differentials for 4wd.
</pre>
And the partsforyourcar loonies actually pimped enough money to get 
Quaife to come up with a torque-biasing diff for the 4T60/4T65 transaxle 
for the FWD blower-3.8 Grand Prixes, Impalas, Buicks, etc.

<hr>
 Later, I found the Ford AXOD transaxle was arranged similar to the 4T60.

<hr>
Steve said:
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    These two sites may be useful to you.


http://spacecoastfieros.com/tech/440-4T60/

http://fp.enter.net/~rockcrawl/4T60a.html
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