Delrin Cross Member Bushings

When installing the Delrin differential cross member bushings, we recommend using a little bit of grease on the OD of the bushing. You will need a press or arbor press to install the bushings. Make sure the bushing goes in straight. You may need to take a die grinder to open up the ID of the cross member hole. This process may need to be done due to rust scaling and/or paint in the cross member. The bushing should never have “play” in it. If it does, the cross member holes are elongated and you should source a new one. 

In rare occasions we have found there is an air gap between the delrin bushing and the SG-47 plate. Install one large washer per side so the SG-47 plates no longer have an air gap.

SG-47 Reinforcement Plates

You have to have these style plates to retain the delrin bushings. If you do not have these plates, you’ll need to order the SG-54 kit or if you already purchased the SG-53 kit, you’ll need to order our SG-47 plates.

Install the studs after the differential cross member is installed. The coarse threads go into the frame. Install the aluminum disc/flat wash/lock washer & nut. Torque the nut to 30-35 ft/lbs or yeild. Recheck the torque after 50 miles or after the 1st event. If your kit came with all four nuts and washers like shown to the left, you’ll discard two nuts and two flat washers.

Pinion Bushing

Install these bushings as you would a factory bushing and torque to factory spec. We include an Upper Poly Bushing and a Delrin Lower Bushing. Torque to 70 ft/lbs.

left graphic: Orientation is set as would be in the car. The thick part of the bushing should go up into the frame mount. Make sure to check that your crossmember needs the washer between the bushing and the SG-47 plate