Trailer Gear Box

Product Code: TGB-001
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Was: $499.99
Now: $399.99
Quantity in Stock Quantity in Stock: 45

Build at home

American made product

100% satisfaction



  • The Trailer Gear Box is a patent pending, precision manufactured, solid billet case, torque amplifying, gearbox.
  • 100% designed and Made in America.
  • Each gear box has two reduction ratios. One for lighter loads to get the job done faster, and one for heavy loads to effortlessly raise or lower your trailer.
  • The Gear box uses 2 hardened 3/4" custom made bolts to couple the gear box to ANY 18v or higher drill via a socket adaptor and 3/4" six point socket.
  • We offer an optional carrying case to protect the billet aluminum's anodized finish from scratches and allow easy carrying from the tow vehicle to the trailer. (Coming Soon)
  • Only one Trailer Gear Box is needed for each tow vehicle in your fleet since it attaches and detaches to your trailer with a lynch pin in seconds.
  • With each tow vehicle servicing many trailers this is a significant savings vs. a dedicated unit on each trailer.
  • The Trailer Gear Box may be left on one trailer if desired and not removed between uses.


The Trailer Gear Box uses any common 18V and up cordless drill for its power source. No proprietary expensive motorized drives are needed. The Trailer Gear Box is easily moved from trailer to trailer so far less devices are needed than for dedicated units such as hydraulic jacks.

Hydraulic jacks are many times more expensive and require one for each trailer plus professional installation. Hydraulic jacks commonly leak down over time causing the front of the trailer to drop down as it sits. Then the trailer fills with rain water. This is a huge problem when a dump trailer is backed up to a garage during a roofing job since raising the trailer dumps hundreds of gallons of dirty water onto the customers garage door and driveway.

Electric jacks sold for the RV industry are not rated for heavy commercial trailers and can't stand repeated uses. They are made for the RV user who uses his trailer a couple of times per year at most.

The Trailer Gear Box uses the jack already installed on your trailer that was designed to handle the weight and abuse of commercial duty.

Taking it with you improves security by making it harder for a thief to attach the trailer to his truck unless he has a spare handle with him.

Instructions For Use

IMPORTANT To avoid damaging your trailer make sure to do these steps first.

  1. 1.Before using your Trailer Gear Box, raise the trailer all of the way up until it stops.
  2. 2.Once it is all of the way up, clean the lower section of the jack and apply the included yellow and red "Stop" sticker just below the top section as shown.(This gives you a warning when you are close to bottoming out your jacks travel. It is important that you do not bottom out the jack since it can cause damage to the jack, Gear Box or your drill.)
  3. 3.Lower the trailer back down until it covers the sticker. (When you raise the trailer up using the Gear Box, seeing "Yellow" means caution. As soon as you see any of the red sticker, stop raising it up.)
  4. 4.Use the clutch on your cordless drill set only as high as needed to raise the trailer without slipping. (This will help prevent any damage if the jack is bottomed out.)


  • It is good practice to place 2x6 wood or similar under the trailer jack to support and distribute the weight evenly especially on soft ground. Using enough wood helps from having to raise the trailer as far to uncouple it from your tow vehicle. Make sure you chock the tires on your trailer before uncoupling, even on apparently flat ground.
  • The Trailer Gear Box attaches to your trailer's jack by removing the jack handle and sliding it over the shaft. Replace the bolt that holds the handle or use the supplied pin and you are done! You may have to file off excessive paint and any burs left from the old bolt to install your Gear Box if it won't easily slip over the shaft.
  • To use the Gear Box to raise or lower your trailer, use a socket adaptor (Included) with a 3/4"socket and use the power of the drill to effortlessly raise or lower the trailer.
  • The Gear Box has two input shafts, one for heavy loads where more torque is needed and one for lighter loads where speed is more important.
  • Either speed is much faster than hand cranking and allows you to hook or unhook the trailer much faster than by hand. This is especially important when your tow vehicle is partially blocking the road and creating a hazard.
  • The use of the Gear Box greatly reduces the fatigue of the operator and reduces the likelihood of shoulder and elbow injuries caused by hand cranking.
  • For longer life of your Gear Box, remove the three bolts at the top and two bolts at the bottom, open the case and grease the gears with a good quality grease. This should be done every 6 months with heavy use, yearly with light use.
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