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Street Race Truck More... The Toolbox

Rear Axle Assembly - 410 Sprint Car Build

7/24/2019

On this episode of the 410 Sprint Car Build series, we will install the brakes on the rear end, cut the torque tube, and install the bell housing.

To start, we need to put the caliper mount on the rear end. We are using steel bolts because they handle the heat better than titanium bolts do. The rotor we’re using also helps with heat dissipation at high RPM's. It has sliders that cater to the swelling and expansion that occurs during a race. This style of rotor is also very easy to mount. To mount the rotor, first, mount the bracket on the axle by aligning the splines. Then, slide the rotor on the axle and make sure the center of the rotor lines up with the center of the caliper. Then, put the safety wires in their proper positions around the bolts so everything is secure.

After the rotor is installed, we put in the torque tube studs. There are two separate holes in case you get into a crash and one ripes out, you can rotate and use another set.

Next, we’re working with our Winters Shifter that comes with a quick-release ball. Then, we’re putting in the breather that comes in our rear end accessory package. It has a floating fitting that allows you to move it where you want. The last thing we are going to install on the car is the bell housing.

Using a bandsaw, we cut the torque tube to the correct length. It’s a 40-inch car so we’re cutting all the torque tubes to 26 and ¼. Next is the drive shaft. It has a different spline on each end and the courser side goes in the rear end. They come 30 inches long and need to be cut to 29 and ¼. After we get the right length, we use a lathe to remove the burrs and make it as easy as possible to slide it into the rear end. If you don’t have a lathe, a chop saw or a bandsaw will also do the job.

Thanks for following along with our build! Next time we will be installing the rear end. You won’t want to miss it!

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