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I have a s5 rx7 turbo with the viscous lds, and I have a car for parts, a s4 turbo rx7 with (I think) the oem mechanical (clutch) lsd.
I'm thinking in put the s4 lsd on s5 diff housing... is possible? Did I have to do any big transformation on the s5 diff housing?
or can I put the complete s4 diff on my s5 car?

regards

 

you can put the complete diff in your S5.

 

Is possible put only the s4 lsd on s5 diff housing?

regards

 

Yes you can do that. It might be esier to put the complete diff into your car.

 

you could take out the half-shafts on each side, then knock out the output flanges/shaft. but then you'd be doing more work then to just swapp diffs.

 

Ok thanks!
Any one know how good is the s4 turbo lsd? how much % of lock have?

regards

 

Fairly high... but the clutch types are quick reacting. but you may want to check it out and see if it needs rebuilding as they tend to wear out faster..