Here we are again, the end of the week is getting closer. That’s right, Thursday is casting its ever-growing shadow firmly on our garage floor. With the end of the week announcing its arrival, we know you are planning to work on your project this weekend. Maybe your plans have already been made? If your plans for spending some time in your garage includes modifying a rearend, you might want to check this out, as Jeff Anderson of Moser Engineering gives valuable insight.

In this edition of Throwback Thursday, we’ve opened the Power Automedia vault, and are taking a short hop back to March 2018, to check out: Info You Need To Know Before Modifying The Rearend In Your Ride. This week’s throwback jumps head first into planning what to consider when modifying your car or truck rearend.

A cost-effective option for fitting bigger tires is to have your original axles re-splined. You need to ensure that the axle diameter does not get smaller than the splined area, or else there will be no material on which to cut splines.

Cutting axles and rearend housings can be a cost-efficient way to fit large rollers on the rear of your car. If you decide to take this route, just be sure to adhere to all of the driveline alignment rules so you don’t have any unwanted vibrations or wear issues.

In the original article, we posed several questions to Jeff, and the answers we got might actually surprise you. The cuts you make will likely affect pinion angle, and Jeff explains what you should shoot for when addressing that concern. Jeff even discusses different gears and posi units.

Posi units are even a big part of the discussion.

Installing a custom-built rearend that fits both the tire/wheel combination you choose, and gets the horsepower to the pavement, is possible without breaking the bank. Being realistic about your expectations and doing your homework before the wrenches start flying are the best ways to ensure you only have to do this task once.

You’ll have to check out the original article to get the full download, and I thought; Info You Need To Know Before Modifying The Rearend In Your Ride, would be a great article for this week’s Throwback Thursday.