About DOI

DeFelice Offroad Innovations specializes in the design and manufacture of aftermarket products for all types of off road vehicles. Our product catalog includes bumpers, winch mounts, rock rails and skid plates for Hummers, Jeeps, Toyotas, Fords, Chevys, motorcycles and more.

Additionally we’re available for custom fabrication for all types of off-road vehicles. We have a complete machine shop and extensive knowledge in custom fabrication and vehicle mechanical modification. We have been building quality products for the offroad industry since 2001.

Four Wheeler Magazine’s Shop Profile of DOI


Hummer H3 Winch Mount

DOI H3 winch mount bumper

The Defelice Offroad Innovations Hummer H3 winch mount is a one-piece bolt-on unit (no welding required). The H3 winch mount is laser cut and fabricated from 3/16-inch thick plate steel and provides you with a factory fit and look. This part is powder coated for durability and also retains the factory approach angle. The H3 winch mount comes pre-drilled with a standard 10.0 x 4.5 inch bolt pattern to install the Warn or T-Max winch of your choice (winch must have a remote mountable solenoid box such as Warn’s M8000, M9000, XD9000, etc…or the T-Max EW9000). The DeFelice Offroad Innovations Hummer H3 winch mount kit comes complete with the mount, longer wire leads, and Grade 8 hardware.

If  you are a retailers or distributor and are interested in carrying the DOI H3 Winch Mount please contact us.

Purchase the DOI H3 Winch Mount |  Four Wheeler Magazine Project Trailhugger H3 Install

H3 Winch Mount Photos

Hummer H3 Winch Mount Installation Instrcutions

  1. Disconnect negative battery terminal.
  2. Remove the lower grill and bumper assembly.
    1. Use a small flat head screw driver remove the plastic pull rivets from inside the front of the wheel well. One on each side.
    2. Remove two 13mm hex head bolts on each side (four total) of the inner wheel well that attach the steel bumper to the lower plastic grill. Access the bolts from behind the wheel well plastic cover.
    3. Remove the four fasteners that attach the skid plate. Remove the skid plate.
    4. Disconnect driving lights in lower grill from the electrical harness.
    5. Remove the horizontal bolts and spring washers that retain the D-rings.
    6. Remove one bolt (two total) from each D-ring mounting plate. Loosen the remaining bolts.
    7. Support the bumper assembly with a sufficient jack or strong friend without beer in hand.
    8. Remove the remaining two bolts that attach the D-ring mounts.
    9. Carefully remove the bumper, lower grill, and if equipped brush guard assembly from the vehicle.
  3. Remove the lower grill from the steel bumper.
    1. Remove the five 10mm hex head bolts that attach the two pieces together.
    2. Remove the bolt retainer clips from the steel bumper.
    3. Do not discard the bolts or the retainer clips.
  4. Remove upper grill as follows:
    1. Make sure to mark locations of fasteners and shims if necessary. Some fasteners may not have shims.
    2. Remove the four fasteners on top.
    3. Remove the two fasteners on the bottom (access thru left and right slots of grill).
    4. Firmly grasp one side of grill around the turn signal. Pull on grill until slip-clips release. Pull grill only far enough to release slip-clips.
    5. Repeat step 4.d. for other side of grill. Pull grill only far enough to release slip-clips.
    6. Remove the grill from the vehicle.
  5. Install the winch solenoid box and longer leads..
    1. Remove the three screws on the solenoid box cover.
    2. Remove the green Warn lead and replace with the green DOI lead.
    3. Remove the yellow Warn lead and replace with the yellow DOI lead.
    4. Remove the blue Warn lead and replace with the blue DOI lead.
    5. Re-install the solenoid box cover and screws.
    6. Mark holes to be drilled to mount solenoid box to vehicle. Mark the top hole 1-1/4 inch down from the center of the lower hood latch bolt. Measure the distance from the top bolt on the solenoid box to get the dimension for the location of the lower bolt hole. Use a ¼ inch (0.250 in.) diameter drill bit to make a hole in the hood latch support.
    7. Put the solenoid box upside down on the hood latch support. Install and tighten the washers and nuts.
    8. Route the Red lead to the battery.
    9. Install the top grill and check for winch control plug clearance. If necessary adjust location of solenoid box.
    10. Cut a 1-1/2 inch diameter hole in the lower passenger side of the air-dam.
    11. Route the DOI winch cables thru the hole.
  6. Clock the free-spool assembly on the winch.
    1. Stand the winch vertically with the motor facing down and the free-spool handle facing you.
    2. Put a scribe line (or mark) from the bolt head to the left of the free-spool handle down to the base of the lower ring.
    3. Use the bolt to the left of the free-spool handle as bolt number one. Count over five bolts and put a scribe mark in-line with the number five bolt on the winch mounting assembly. Your mark should not be on the free-spool assembly or the lower ring.
    4. Remove 8 of the 10, 5/32 Allen screws that attach the free-spool assembly to the winch. Loosen the two remaining screws completely but do not remove.
    5. Lift the free-spool assembly and lower ring approximately ¼ inch from the winch assembly.
    6. Rotate the free-spool assembly counterclockwise until the number one bolt mark aligns with the number five bolt mark. The cable spool should turn with the free-spool assembly.
    7. The free-spool assembly should fit flush at both gasket locations. It may be necessary to tap that top of the free-spool assembly with your hand (not a hammer). DO NOT PULL TOGETHER WITH BOLTS!
    8. Install all ten of the 5/32 bolts finger tight.
    9. Tighten the ten bolts in an alternating pattern. Tighten one bolt; the next bolt to tighten should be 180 degrees from that bolt, repeat until all ten bolts are tight.
  7. Assemble the winch, DOI winch mount, and lower grill as follows:
    1. Install the roller fairlead with the two 3/8-16 flat head screws. Make sure the screw heads are on the inside of the winch mount and the washer, lock washer, and nut are on the outside of the roller fairlead. Use bolt holes adjacent to winch cable access hole. Tighten the bolts.
    2. Use a ½ inch (0.500 in.) drill bit to make two holes in the roller fairlead. Use the lower two holes in the winch mount as a template.
    3. Replace the Warn ground cable with the DOI ground cable.
    4. Place the square nuts with the flat side towards the front in the winch assembly mounting holes. Put masking tape over the holes to hold the square nuts in place.
    5. Cut the winch cable loose and feed thru the DOI winch mount and roller fairlead.
    6. Place the winch inside the DOI winch mount. Make sure that the free-spool lever aligns with the cut-out in the winch mount.
    7. Install the four bolts that attach the winch to the winch mount. Tighten to the specifications provided by Warn.
    8. Put the five bolt retainer clips on the top of the DOI winch mount.
    9. Bolt the lower grill to the top of the DOI winch mount.
  8. Install the upper and lower grill and DOI winch mount assembly.
    1. Use a jack to raise the winch mount assembly close to the vehicle but with enough space to route and attach the winch leads.
    2. Set the winch mount assembly on jack stands or equivalent. Make sure the winch mount assembly is secure on the jack stands before installing the leads.
    3. Route negative (black) lead from winch motor thru the 1-1/2 inch hole in the air-dam and to the battery.
    4. Attach color coated DOI leads to color coded studs on the winch motor and tighten. Make sure to match up the colors correctly.
    5. Install the upper grill. Make sure all the slip-clips are attached.
    6. Install the lower grill and DOI winch mount assembly without brush guard as follow:
      1. Use the factory D-ring mount and bolts to attach the assembly to the vehicle.
      2. Tighten all the bolts.
    7. Install the lower grill and DOI winch mount assembly with brush guard as follow:
      1. Put the plastic shim under the brush guard.
      2. Put the brush guard then the D-ring mounts.
      3. Use the factory D-ring mount and bolts to attach the assembly to the vehicle.
    8. Assembly of the rest of the factory hardware is the reverse order of the disassembly.
  9. Connect the winch cables to the battery terminals.
  10. Make sure all hardware is tight and all connections are secure.

Quality Hardware and Materials

Why do we insist on using Grade 8 hardware and DOM tubing? We’ll let the numbers speak for themselves.

Material Yield Strength, PSI*
ASTM Grade A-53 pipe 30, 000
1020 ERW tube 40, 000
1020 DOM 70, 000
4130 Cr-Mo 90,000
4340 Cr-Mo 120,000
Bolt Tensile Strength (Breaking Strength -lbs)
BoltDia(in) Grade 2 Grade 5 Grade 8
Coarse Fine Coarse Fine Coarse Fine
1/4 2350 2700 3800 4350 4750 5450
5/16 3900 4300 6300 6950 7850 8700
7/16 7850 8800 12800 14400 15900 17800
1/2 10500 11800 17000 19200 21300 24000
9/16 13500 15000 21800 24400 27300 30400
5/8 16700 18900 27100 30700 33900 38400
3/4 24700 27600 40100 44800 50100 56000

Standard Bolt Head Markings

Toyota Front Axle Truss

The Defelice Offroad Innovations front axle truss is built for 1979 thru 1985 Toyota truck and 4-Runner front axles. This axle truss is not only designed to strengthen but to also protect the front axle and differential from damage. The axle truss also reinforces the steering stops that are usually bent if your vehicle has seen much off-road use. Built from 3/16-inch thick plate steel and DOM tubing this truss provides superior front axle performance to keep you on the trail. The materials are laser cut for quality and to make sure each part fits perfectly.

The axle truss can be fully installed without removing the axle from the vehicle although we recommend having the axle out of the vehicle for ease of installation.

You must have relocated steering brackets and hardware (i.e. high steer) to be able to install this axle truss.

Truss is available with or without u-bolt cutouts.

$140 plus shipping and handling. Installation available. Contact to purchase.

Installation Insructions

Toyota Front Axel Truss Installation Instructions

Important – You must have high steer components to install this truss.

Sway-bar brackets and steering damper must be removed.

  1. For those who are use Hanes or Chilton’s manuals – Disconnect negative battery terminal.
    Note: DOI recommends removing the front axle from the vehicle but it is not mandatory for installation.
  2. Remove steering damper and sway-bar tabs from axle. Make sure to grind flush.
  3. Set DOI axle truss on axle and make a mark around the perimeter. Remove truss after mark is made.
  4. Grind factory diff cover welds flush to allow proper fit of axle truss. Truss must fit flush against axle tube and differential cover. Remove all paint and or rust here truss will be welded.
    Note: You may need to grind the top and bottom steering stop welds to get the truss to obtain proper fit.
  5. Check the fit of the truss on the axle. A maximum of 1/16th inch should be between the axle truss and axle. Grinding to fit may be necessary.
  6. Put a (non-impact) socket on differential fill plug and slide axle truss fill plug tube over socket. Tack weld fill plug tube in place.
  7. Use DOI axle truss as template to install u-bolt covers in proper location. Tack weld u-bolt covers only. Do not tack axle truss! Truss must be removed to fully weld u-bolt covers.
  8. Weld differential fill plug and u-bolt covers fully. This will insure that the axle truss will not fill with water or mud.
  9. Set axle truss on axle and clamp in proper location. C-clamps are recommended for a tight fit and minimal weld gap.
  10. Tack weld axle truss to axle in a minimum of eight equally spaced locations on the top and bottom of the axle truss (16 total).
  11. Weld axle truss with the steps that follow:
    IMPORTANT – Welding sequence must be followed properly to avoid possible warping of the axle housing.
    A. Weld steering stops, top and bottom.
    B. Weld highest point of differential cover, top and bottom.
    C. Weld outer section of truss between steering stop and outer u-bolt hole.
    DD. Weld from differential cover to drivers side 2 inches top and bottom.
    E. Weld full contour of differential cover top and bottom.
    F. Starting at steering stops, make two inch welds alternating form left to right and top to bottom. Do not weld more than two inches at a time to prevent heat  distortion.
    G. Let axle cool to ambient temperature. We recommend drinking your beverage of choice at this point.
    H. Weld u-bolt holes, fill plug and any remaining areas not welded. Make sure axle truss is fully welded top and bottom.
  12. Put differential cover on axle and tack weld.
  13. Fully weld differential cover.
  14. Reconnect negative battery terminal.
  15. Grind and paint as necessary.
  16. Flog as often as work and significant other permits. ENJOY!!!

Contact DOI with questions, if necessary.