Curious as to your general thoughts on OME overall. I just swapped out an oooold 3" lift with a new 2.5" OME lift, leaf springs all around with shocks. It feels great. But I've heard talk about "parabolic springs" whatever that means.
(side note - cool you're in Melbourne. I worked north in Shepp for awhile)
Overall ome is excellent, hard to or won't get better. Only can give my opinion.
If Toyota would have done parabolic springs they would have extensively tested them to the upmost extreme before releasing them.
I believe even today, some parabolic spring marketers are having to return, replace, modify for each vehicle. I think parabolics are a good idea, less steel so less weight and quite an elegant design compared to the old horse and cart design. But I am unsure of longevity compared to leaf springs. All ears.
Tricky thing about parabolics is that most ome manufacturers have for the most part moved on from leaf springs.
So my bet is that it does not make sense for toyota to do the change to parabolics as the original leaf springs are thoroughly trialed and tested. But who knows, maybe one day.
But then I think it was a bad idea for toyota to make the newer 70 series wider at the front and leave the back narrow.
Overall it would be hard to be a manufacturer, be vigilant in quality control, keep faithful to philosophy of principals and match a rapidly changing/manipulated market. I think EV's are a very big lie. Toyota resisted bowing to the ev for good reason, but have succumbed to market demand, they have to.
The old stuff up to 1992-93 is my pick for overall integrity. I met a wizard engine builder just last week with over 6000 rebuilds under his belt, he reckons he can do a lot more with a hz than a hd engine. He has the upmost respect that toyota takes great pride in their work, well balanced engines.
