Rear - PINION MOUNTED PARKING BRAKE
Build Instructions for Parking Brake Kit for Chevy car 12 bolt (68-72)
Installation Instructions for Parking Brake Kit for Chevy car 12 bolt (68-72)
I reinstalled the yoke, removed the calipers and rotors so they did not cause drag on the yoke, reinstalled the lock washer and nut torqued it down to 200 lb-ft.Then check it with the inch pound wrench. The rear pinion rotational resistance should be 9 to 10 inch pounds. I ended up with a final torque on the big yoke/pinion nut of 250 lb-ft.
If you torque it too much you will crush the “crush sleeve” inside and it will need to be taken apart and replaced. You will get too much play in the gears. Most people say if you remove the yoke, you need to replace the crush sleeve. We’ll see.
Assemble caliper with tubes, bolts and lock nuts, and place loosely assembled tubes and bolts into main bracket tubes, then tighten caliper bolts, ensuring that tubes and bolt heads are allowed to slide freely in and out of the main bracket tubes.
Tighten caliper pads with caliper lever so that the caliper holds in true position with respect to rotor and forces main bracket in correct position.
Slide main bracket from front to back using the secured caliper and its tubes as the guide to find the best location (front to back) for the bracket relationship to the rear diff. webs.
Drill 5/16” holes through ears and diff. webs keeping holes as far as possible from the edges of the diff. webs.
*Be sure to leave clearance for nuts on underside of webs without hitting.
Now, to ensure that the parking brake system does not bottom out on the frame, it is necessary to raise the 3 bumpers. The 2 on the rear housing out by the spring perches and the one in the middle between the rear pumpkin and the frame cross member.
Also, I ground the caliper a bit and bent back the frame lip shown in the above picture.
I melted down “soda” cans and poured them into a steel tube. You could just buy a bar of aluminum but I didn’t want to wait. Then, I took them out and machined them to 2” diameter x 3” long with 3/8-16 threads 1” deep on top, ½-13 x 1” deep on bottom.
Used a big washer and bolt through the old bumper mount slot to match it up directly under the frame. Then, the Energy Suspension bump stop 9.9101G from AutoZone screwed right in the top side.
Now the suspension can't bottom out on the pinion mounted parking brake. I am running a 2000 Neon center console with the hand brake assembly in it. This will match up nicely with this parking brake.