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The 93/94 model workshop manuals list a Visco LSD option, but it does not seem to have been sold in USA/Canada.
Here's how to install a 1G/2G Talon Visco diff in the wagon.
The Talon (non-Visco) and Expo wagons use the same 3.454 diff. The difference is how the drive shafts are connected. On the Talon, the axle CV carrier clips directly into the diff, with a 3 bolt (1g) or 4 both (2g) flange on the wheel end that connects to the axle stub in the trailing arm.
On the Expo, there are 3 bolt flange/axle stubs that fit into the diff, and the drive shafts connect directly into the wheel hub.
The Visco diff has a single spline on the left (? I forget which) axle output, and a double stepped spline in the right. The double spline connects to the spider gears and also the viscous coupler unit.
So ... what's required is to fit the 3 bolt flange/axle stubs into the Visco diff, right? Almost!
1. The single spline 3 bolt flange/axle stub is about 4mm too long. This is corrected by cutting the spline at the locking circlip groove (with an angle grinder wheel), and then remaking the circlip groove with a thin cutting disk on a Dremel tool.
2. The single spline 3 bolt flange/axle stub will fit the other side of course, but you won't have the Visco operation. Here you need the double spline CV carrier from the Talon drive shaft. The carrier body (that used to contain the CV joint) has to be cut down about 1cm, a flange disk made and professionally welded on, trued up in a lathe, and finally the three drive shaft CV carrier mounting holes drilled.
With some fiddling with Talon bits is would be possible to use 4 bolt flanges and CV carriers, especially if you plan to install a 4G63T to replace the 4G64.
I did this on my 4G Eagle Summit coupe for the AWD conversion.
So, I have tried to follow this write up along with your webpage (
http://www.lancerproject.ca/lancerproject_2.htm) and I am still lost
What differential cups are you using in this photo to interact with LSD?
Thanks!