Easy, open your window, drive slow and tap the brakes. If you hear clunking coming from the front your LCA bushings are *****. If they are oil filled bushings they will leak and then a few months later the clunking begins.
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After leveling truck - ride is back to like new. ILAND tool is awesome - used it to take air out of system before removing your airstruts - enabling the system and then leveling it.
I replaced both my fronts with Arnotts a few months ago
I crushed 3 fingers and required surgery and pins because I did not depressurize the system and the strut blew. Be careful. I was stupid and have suffered enough. Please be kind. It’s a very doable job and improves the ride significantly. I managed to insert a new strut 2 days after surgery and complete the rest a month later as I was healing. Did not have a IID. Taking the airline off the front valve block or the air line nut on the top of the strut depressurize s the system but DO NOT REMOVE THE BIG NUT FROM THE TOP OF THE STRUT WITHOUT DEPRESSURIZING THE SYSTEM. I made new air struts using generic air bags and Bilstein Sports shocks (yellow) all around. These are available from bilstein as a strut for the fronts only but are expensive. The ride is much firmer. Some modification of the top cap of the shock will be needed to fit into the air spring. I should detail this in a separate write up sometime. My 3 still settles onto bump stops after sitting a few days, even after rebuilding the valve blocks. I’m not worrying about it until it spring as it’s fine when driven daily and the pump is not clicking on very often.
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