i've been searching all over the forum and am finding everything except what i want to know, so i apologize before hand if this has been covered....

is the open diff w/drums out of an 85 gs big bearing?

can i just convert it to disc and swap out the 3rd member in it, or do i need the actual diff and axle housing off a gsl/ gsl-se?

i know gsl's late 83- up have big bearings, but just wasn't sure if all of them were upgraded

 

all of the 84-85 cars are big bearing. re speed has a kit to put the discs on a drum rear too..

 

The mounting flanges on the housing ends are different between disc and drum brakes. Good thing Billy's here to support our needs.