Any '95 Gen II with the 3.5L motor had the 4.636 gears. The rear axle is larger than that used behind the 3.0L motor. It will not fit the Gen I axle. The only factory locker that MIGHT fit the Gen I (still not 100% sure on this), is the one found in the '92-'93 Gen II SR with the 3.0L motor.

BTW, the Gen II LS with the 5 spd does have the 4.636 gears also, since it has the larger front diff.

Lee
'94 LS, 3.0 V6, Auto, completely stock