DS01 Eaton rear leaf 175 rate spring vs normal 126 rate
 

Has anyone used DS01 Eaton rear leaf springs? It has a 175 rate (for heavy duty use), vs the normal Trans Am 126 lb spring rate.

I have original rear springs in my 1981 Trans Am, looking to stiffen up the rear suspension and get a little lift back in the rear. A full tank of gas or passengers brings the back down too low for my taste. I am on the fence whether I want that stiff of a spring, my fronts are Moog 590 springs with a 1/2 coil cut. Their original spring rate was 399, I estimate approximately 420 spring rate now after cut. Factory front 1.25" sway bar, .75" rear sway bar. Going for a "spirited daily driver".

175 rear spring rate is too much for a 399 front spring rate. The car will be loose.

I believe you are right. Just read that the fronts should be 550+ with 175 in the rear.

From my research it sounds like Trans Am's used either normal or heavy duty springs in the front but always used the same 126 in the rear regardless of front springs.

I ended up going with the Eaton 126 lb springs.