How to Install Lowering Blocks on a Truck


Lowered trucks are cool, no doubt about it. They handle better than a stock truck, ride better and get more attention than ever before. There are lots of different ways to achieve the lowered stance that people are after. One of the easiest and cheapest ways to lower the rear of a leaf-spring equipped truck is by installing a lowering block. Tons of trucks out there can benefit from a lowering block, including most mini-trucks like the S-10, Toyota Tacoma and Nissan Hardbody.

Things You'll Need

  • 2, 3 or 4-inch lowering blocks U-bolts Nuts & lock washers for U-bolts 1/2-inch ratchet and sockets Jack Jack stands Reciprocating saw or grinder Impact wrench (optional)
  • Determine if you can install a lowering block by itself. Look underneath the truck and see if your leaf springs are located underneath your axle. If so, then you can proceed. If not, then you'll first need to purchase an axle flip-kit, which in itself gives the truck a 4-inch drop.

  • Loosen the rear lug nuts. Jack the rear of the truck up in the air and secure it on jack stands. You want to have the stands on the frame, forward of the leaf springs.

  • Jack up the axle housing so that the tension is relieved from the leaf springs and set the axle on another set of jack stands. Remove the wheels at this time as well.

  • Using a 1/2-inch ratchet, loosen the factory u-bolts that hold the leaf spring to the axle. If you have an impact wrench, use it now as it will make the process go a lot faster. Be sure that all tension is off of the leaf spring before you remove all of the bolts, otherwise the spring can pop out on you and cause injury.

  • With the leaf springs unbolted from the axle housing, jack up the axle so that there is a gap between the top of the leaf spring and the bottom of the axle. Try not to shift it from side to side, as this will just make things more difficult later on.

  • Place the lowering block on top of the leaf spring. Usually there is a centering hole on the bottom of the block which is meant to be placed over the bolt that holds the leaf spring pack together.

  • Place the u-bolts over the axle and mount them to the pad below, just like it was from the factory. Be sure to align the alignment tab on the top of the block with the hole on bottom of the axle.

  • Tighten the u-bolts on both sides. If you have extra nuts, double up on each bolt. This will act as a secondary lock nut, and keep everything secure.

  • Place a wheel back onto the vehicle. The new u-bolts should be hanging down pretty far from where the nut is securing them to the leaf spring. If you ever were to get a flat tire your suspension would hit the ground before the rim, causing an accident. Make sure that the u-bolts do not hang lower than your rim does. If they do, cut off the excess with a reciprocating saw or a grinder with a cut-off wheel. Even if they don't, cutting down the u-bolts is a good idea so that they don't get caught up on objects when driving down the road.

  • Take the truck off the jack stands. Torque down the wheels.

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