Originally Posted by 84z28
Have you ever pondered that the subframe in the front doesnt need to be dropped
Well I think it really depends on how much of a spacer you are adding
to the struts. The taller spacer you put on the struts (without changing anything else) the more angle the CV axles have
to run at (all the time) to get "down" to where you have pushed the wheels from the body. For a 1 inch, or 1.5 inch, even a 1 & 5/8" I don't think its any problem. Bilstein currently makes a set of replacement struts for the Renegade that are 1" longer than stock that provides the same overall effect (I'm hoping they will come out with those for the Compass soon, its a way better route than spacers).
Now I think once you get to a 2" spacer, you've likely reached or started to exceed the limit of how much extra angle you can add to the CV axles and still expect any kind of longevity from them. Harsher angles cause CV joints to wear faster, this is really well known and I don't need to explain why because you can google it really easily.
You can also "preview" the effect really easily at home. Take your floor jack and a tape measure, go look at the current angle of the front CVs and keep that angle in your head, now use your jack to lift on the subframe about 2 inches. Now look at the axle again and note the increased angle. This is the extra angle you will have forced it to run at all the time on the road. This is an angle that is not the angle the engineers intended for it to run at and meet its longevity goals. Crank the jack up some more if you want to see the effect exaggerated.
A little bit probably won't make a huge difference. 2+ inches, it might, and that's all I'm saying. You should be conscious of the potential side effects of this. Replacing CVs isn't a huge deal, kinda spendy, might be worth it, its just something to be aware of.
If and when Bilstein releases the 1" longer struts for the Compass, I think that would be the best and most ideal route. No goofy spacers to create a new point for issues to occur between the body and strut contact. The Renegade folks say it fixes the clearance issue at the bottom of the strut tower. Rear diff stays in its original tucked up location. You end up maxing out at the same 29" tire no matter what, so who cars about the difference of 1" or 2"? (Thats a good setup for a joke right there...)
You have to do the crazy 4" lift to get into 30" tire land so, might as well play it slightly safer (in my opinion) and stick to around 1", hopefully gained from strut length.
But like I always say, its a free country so anybody who wants to jam those spacers in I say have fun!