Rear sagging after Bilstein 4600 install

[cinaibur]

Hey guys,

I installed new Bilstein 4600's on my 02 Yukon SLT. The ride quality is massively improved over the blown OEM struts with 200k miles on them. However, I think the rear end is sagging a bit. It's hard to tell, but I think the rear is sitting a little lower than the front. I did not have the z55 autoride, so I didn't convert the rear springs to z71's. I hooked a trailer to it, and it pulled great, but it definitely seemed lower than it should. Are my rear springs just worn out?

 

[mattbta]

Do you have RPO zw7 premium smooth ride? If so, then you need to replace springs.

 

[Tonyrodz]

Do you have RPO zw7 premium smooth ride? If so, then you need to replace springs.

I have the zw7 on my 03 How, and I went to kyb shocks, while using the original springs. Those springs are soft, and with the kyb installed it was a scary ride. The rear was jumping all over the place. I put lowering springs in the rear and it firmed it up really nice. If you're using the stock springs I'd swap them out for something a little stiffer/firmer.

 

[cinaibur]

Do you have RPO zw7 premium smooth ride? If so, then you need to replace springs.

Sorry, I didn't mean z55, I meant I don't have zw7. I checked the glove box when purchasing. The ride quality feels totally fine. The rear doesn't act weird when driving, it just seems a little low. It slight enough that it's hard for me to tell.

 

[HiHoeSilver]

The Z71 springs would give you a little height boost.