Just resurrecting this subject.

I have a 3.7 Roadster and am getting clunking from the diff. When de-accelerating and then accelerating (backlash), and also sometimes from stationary (as though the brakes are stuck on and then releasing, but it isn't the brakes as the wheel cylinders were replaced at a recent service). The diff oil has been changed twice recently, but hasn't improved the situation.

My wife has even noticed and commented about the clunk when changing gear, so it must be noticable! To me it sounds like a drivetrain issue, but as the car is a 2018 model with only 13000 miles on the clock I don't think it's UJs. I have checked all the suspension fixings, checked the wheel splines (wire wheels) and all seem OK, but have noticed the play between propshaft and rear wheels seems a little excessive - I've measured 5mm rotation on the outide of the tyre tread before the prop shaft rotates, does that seem excessive?

I will talk with Techniques and JB Sports for guidance, but any pointers from our esteemed experts on here?


Roadster 3.7
Plus 4 110 Anniversary
Plus 4 Fiat TC