348 Squeaky Rear End

Remind us what size wheels and tyres are you running ?

Thinking as the suspension pick up points of the upper wishbone , the factory has already altered along the way to improve the handling breakaway point ( give more warning to the driver ) .

My grandfather was a motor engineer ( kept the rolls Royce Merlins going in Spitfires / Lancaster bomber s during the WW2 ) .After the war went into maintenance of large fleets of cars etc .
Passed some of his skills to my farther who then passed them all be it diluted down to me .

One thing they both said re fitting bigger ( I mean wider ) wheels and tyres for more grip , was they put extra strain on the suspension joints , bushings .

Perhaps bcz the 348 s already has had a meddle re pick up points , and wheel offset changes , it’s on the edge , has a narrow envelope of acceptability of wider “ rims “ compared to say a stock GM / Ford product that you ran and possibly “pimped up “at high school ? This wear strain effect is super accelerated .
If my grandpa was right , knew what he was talking about ?