I had a z32 with 200,000 miles and the vlsd would overheat and stop locking. All it had was I/E/100 shot and It sucked everyday. Ive had a nismo 2way for about 4 years in my s14 n love it over all other diffs Ive felt (3x open's/2x welded/2x vlsd's/2x 2way's).