I am installing my rear Dana 489 from ECGS, and the spring perch diameter is way less than stock. My stock 35 had a perfect size perch for the spring to seat on and "lock" into. Anyone ever come across this? Am I supposed to just use the retainer and let the spring move around that much on the new axle?? It'll literally just be metal on metal no isolator or anything. Seems wrong to me but ECGS says this is how it is designed...
That looks good to me. I had to cut the spring perch on my stock 35 to look like that for shock clearance.Also I don’t think there is any isolator used on the axle perch.
Is there a plate that bolts inside the spring to hold the coil to the spring perch? I believe my ECGS 8.8 is setup the same but I’ll have to go check.
No, all that is needed to hold the spring in place is there. That center part that the spring sits over is what keeps it there.
Brianj5600
TJ Expert
The stock ones definitely have a plastic isolator on the bottom axle side and a rubber one on the top frame side.
Only on the early TJs. By 2003, the lower plastic disc was gone.
I'll snap some photos of my D489 installed tomorrow AM. There should only be a gap between spring and perch when at full droop. And as you said that round plate retains the spring. Attaching photo of round retainer plate installed without spring.
I was referring to a stock axle, I don’t have any experience with the ECGS axle. I assumed that they would be the same.
Some might say the shock is too long if the springs come unseated at full shock extension. Or the spring's free length is too short for the extended shock.