I had the same problem happen to me. I replaced all the bolts and washers with grade 10.9 stuff and put loctite on the bolts. I think the stock ones on my 90 had loctite on bolts stock. No problems so far.


Blacktero: 90 Montero Lwb V6 RS Model. 16" Toyota Alloy Rims, Dual Bouncy's; Gen II Front Rotors & Calipers; Rear LSD

Sraider: 87 Raider 2.6 base. Work yet to be done.