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0503htp Gto 17 Z

In order to get at the bolts holding the sway bar in place, the rear subframe needs to drop down a bit. To accomplish this, the differential carrier assembly needs to be adequately supported, here by a transmission jack and wooden block. Once the carrier is supported, the four bolts connecting it to the remainder of the vehicle above can be safely removed, and the jack slowly lowered to give adequate clearance for a wrench to fit between the subframe and the floorpan. You most likely do not need to unbolt the lower shock bolts, but if for some reason you do, be advised that lowering the subframe too far can start pulling on the brake lines, which you definitely want to avoid.
2004 Pontiac GTO Chassis Modifications - Back In Black: Part II

In order to get at the bolts holding the sway bar in place, the rear subframe needs to drop down a bit. To accomplish this, the differential carrier assembly needs to be adequately supported, here by a transmission jack and wooden block. Once the carrier is supported, the four bolts connecting it to the remainder of the vehicle above can be safely removed, and the jack slowly lowered to give adequate clearance for a wrench to fit between the subframe and the floorpan. You most likely do not need to unbolt the lower shock bolts, but if for some reason you do, be advised that lowering the subframe too far can start pulling on the brake lines, which you definitely want to avoid.  View Related Article

 

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