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Phoenix Electric Trailer Jack - A-Frame - 22-1/2" Lift - 4,000 lbs

Phoenix Electric Trailer Jack - A-Frame - 22-1/2" Lift - 4,000 lbs

Item # UF38-944040
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Shipping Weight: 29 lbs
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This super-fast electric A-frame jack has a durable, efficient ball screw and a memory function for easy setup. Offers 18" of travel and 4-1/2" of extension with the drop leg. Extends 6" in 9.5 seconds with 1,000 lbs of tongue weight. Lowest Prices for the best trailer jack from Ultra-Fab Products. Phoenix Electric Trailer Jack - A-Frame - 22-1/2" Lift - 4,000 lbs part number UF38-944040 can be ordered online at or call 1-636-306-4830 for expert service.
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  • Reviews (74)
  • Q & A (0)
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  • Why etrailer?

Ultra-Fab Products Trailer Jack - UF38-944040

  • A-Frame Jack
  • 3001 - 4000 lbs
  • Electric Jack
  • Drop Leg
  • Bolt-On
  • Standard A-Frame Jack
  • 18 Inch Lift
  • With Foot
  • Ultra-Fab Products

This super-fast electric A-frame jack has a durable, efficient ball screw and a memory function for easy setup. Offers 18" of travel and 4-1/2" of extension with the drop leg. Extends 6" in 9.5 seconds with 1,000 lbs of tongue weight.


  • Electric jack lets you lift and lower your A-frame trailer quickly and easily
  • Efficient ball screw makes it fast and easy to position your trailer
    • Ball bearings roll along sturdy, threaded steel rod
  • Powered drive provides quiet operation and eliminates the need for hand cranking
  • Easy-to-access on/off and retract/extend buttons make for simple operation
    • Buttons on front panel will not break off like standard toggle switches
  • LED courtesy light on front of jack allows for simple nighttime setup
  • Durable powder coat finish resists corrosion
  • Emergency override allows manual operation in case of power failure
    • Included adapter allows you to easily use your drill to raise and lower the jack
    • Manual crank handle not included
  • Bolt-on installation


  • Bracket height:
    • 10-1/2" Retracted - from mounting bracket to bottom of footpad
    • 28-1/2" Extended - from the bottom of the extended jack and extended footpad
  • Total travel: 22-1/2"
    • Travel: 18"
    • Drop leg: 4-1/2"
  • Drop leg: 4 adjustment holes 1-1/2" apart center to center
  • Travel speed (w/ 1,000-lb tongue weight):
    • Extends 6" in 9.5 seconds
    • Retracts 6" in 8.6 seconds
  • Lift capacity: 4,000 lbs
  • Outer tube diameter: 2-1/4"
  • Footplate diameter: 6"
  • Motor attributes:
    • 12 Volt
    • 10" Travel in 18 seconds
  • 2-Year warranty
    • 10-Year warranty if registered within 90 days

How to Determine the Lift Capacity You Need in a Jack

A trailer jack is designed to lift the tongue of your trailer so you can connect the trailer coupler to your hitch ball. To do this, you'll need a jack with a lift capacity high enough to handle your trailer's tongue weight.

Tongue weight is the amount of weight that your trailer applies to the back of your tow vehicle. Typically, your tongue weight should be 10-15% of your total trailer weight (trailer + cargo). In other words, a 10,000-lb trailer would have a tongue weight between 1,000 lbs and 1,500 lbs. For a trailer this size, you would need a jack with a lift capacity of at least 1,500 lbs.

It's okay to have a jack with a weight rating that is higher than your trailer's tongue weight. In fact, a jack with a higher lift capacity should operate more efficiently, allowing you to spend less time cranking and more time camping.

Trailer and Camper Jack Lift

Every jack offers a certain amount of lift or travel. Screw travel is the distance the jack extends when you crank it (or toggle it to "extend" on an electric model). Some jacks include a drop leg for extra adjustability. On these jacks, you'll see the maximum extension of the drop leg listed in the specs as well. Adding the screw travel and drop leg travel together will give you the total lift. The total lift listed above can help you determine how high this jack will be able to raise your trailer.

38-944040 Ultra Fab Phoenix Power Trailer Tongue Jack - A-Frame - 18" Travel - 4,000 lbs

Customer Reviews

Phoenix Electric Trailer Jack - A-Frame - 22-1/2" Lift - 4,000 lbs - UF38-944040

Average Customer Rating:  4.5 out of 5 stars   (74 Customer Reviews)

This super-fast electric A-frame jack has a durable, efficient ball screw and a memory function for easy setup. Offers 18" of travel and 4-1/2" of extension with the drop leg. Extends 6" in 9.5 seconds with 1,000 lbs of tongue weight.


This jack is amazing. Fast. Quiet. The memory is very useful. The extra mounting holes on the base plate allow you to spin the jack to place it so that the truck tail gate will not strike the head of it if you drop the tailgate. I highly recommend this jack.


The jack is very nice. We had an issue with the original; however, etrailer and the mfg immediately replaced it. As always great customer service!


One year anniversary of installing this on my Airstream Basecamp, works great and really makes life a lot easier compared to the hand crank that came with the trailer.


Installation was very easy. Just pulled off the old jack and installed the new Phoenix. Wired it up an WOW!! This thing is FAST!! My travel trailer is 36' long. This operates it up and down like it weighs nothing! My old jack quit working 2 months out of warranty and it NEVER operated half as fast as this one. If the durability is as good as the operation this may be the best tongue jack ever! Being able to double click the up or down button for automatic operation is a great idea! If any problems arise I will try to update this review.


Only thing would suggest is the jack remembered memory settings when battery disconnected.
Like the speed and auto retract.


I have been happy with the jack. It is much faster than my old one, and doesn't sound like it is going to die while lifting. I really like the memory settings it has, as they come in very handy.


Replacement for my camper and it works great. Easy install and operation. Also like the 10 year warranty.


Great addition to my cargo trailer. Much easier than the crank.


etrailer sent me a used electric jack that another customer returned because it was defective. I know it's defective because the the email between the customer and Greg S at customer service was inside the box. The box was obviously very damaged, taped in areas that were torn, had someone else's shipping label on it, and the jack was filthy. Byron H and Scott H (the two that gathered and packaged my shipment) should have to go remedial training on how to do their jobs. Every item I ordered was opened, there were multiple items just loosely thrown in with one heavy box bouncing around. Terrible experience with etrailer. Sucks when a company stops caring about quality and would rather just let customer service fix their issues. Way to ruin it for the customer!

I will have our customer service team reach out to you.
-- Etrailer Expert Jenny N - 11/15/2021


Easy install. Great features! I can go from hooked up to fully retracted in 22 seconds! The 2 presets allow me to be hands free so I can unhook chains and electrical at the same time.


Works well and is VERY fast.
Strong enough
to lift the back of my pickup up. (raised it a little to far when putting on my weight distribution hitch.)

To make it go up or down just a little bit, press firmly and release. If you try to tap it lightly, and do it twice too fast, the jack will go ALL THE WAY in that direction.

It would be very nice if it came with a weather proof cover. (No bright logo please. People would know it is a good one and might wish to steal the jack.)


This is the best jack I have had (and I seem to have gone thru quite a few). It was a quick and easy install for a replacement and I have found it is the fastest jack to raise or lower my hitch. It is also one of the quietest I have ever used. Great for early morning packing and not waking up all the neighbors. :) The jack seems a lot stronger than other jacks I have used and better built with less plastic on it than most. Would definitely replace any manufacture supplied jack on a new trailer with this one again on a heartbeat!

I have had a problem with the switch on this jack. It was the first generation of the jack. I spoke with Ultrafab and they replaced the whole jack with a new one without any issue to correct the issue. I am very impressed with the Jack and especially the great customer service! Cant be beat!
Lonny A - 09/13/2017


If I had only known how good this trailer jack worked I would have had it many years ago. It makes it so easy to hookup and unhook. Getting older and had to find a way to make it easier. This is the ticket. I can't say enough good things about it.


After 1 year it still working strong! It gets used everyday and hasn’t let me down yet!


Awesome jack. Can’t beat the ten year warranty. Definitely faster then any of the other jacks on the market. When installed sideways with controls to the driver side, there is still plenty of room to open tailgate .


Best jack out there. The fast up and down speed along with the 2-button memory makes this jack the best one out there in my opinion. Mine had 2 memory buttons (a lot of the promo material suggested only 1 memory button) so I can set one for the extended/hitching position, and a second for the fully retracted position. Thus, I never need to hold extend/retract...rather I just hit one of the memory buttons and it does the rest. Huge time saver. To set the memory on mine I hold the desired memory button and wait for the light to flash red (not green like the manual said). The drop foot is also a nice feature. I would strongly recommend this jack.


After only a few uses the jack quit working. First the memory settings kept getting "forgotten". I reprogramed them twice before they quite working altogether. I kept using it without the presets but later it would not go up and down. I had to use a wrench and the provided socket to to move the jack which was much harder than expected. While I was turning the jack it started running, ripped the wrench out of my hand, and the wrench handle put a hole in my propane tank cover. The manufacture replaced the jack at no charge but would not do anything about my propane cover. After using the 2nd jack awhile in now is making clicking noises as the tongue is lowering. It sounds like maybe there is a tooth missing on one of the gears. My tongue weight is around 1400 lbs so well below the rating yet the jack does not seem to be holding up well even though it is not use all that often.

Otherwise I do like the jack. It is fast and the memory presets are a nice convenience. I also like that the head is smaller than other similar units.


Looks great. Have not used it yet.


This Jack is crazy fast. Moves smooth and doesn't seem to struggle in the slightest. My only concern is that there is no positive power shut off. Im an electronics tech and ive seen touch buttons like this fail in moisture environments. This seems well built but I didn't want it moving down when driving so a simple on off switch was added. Concern solved.


I am awaiting my 4th on that should arrive today. I have not had any good luck with this model. For some reason it will work for a bit then just quit. the warranty is the only thing that is keeping me with this product. I am hoping this next replacement will last but we shall see.


Should have bought this years ago. Make connecting and disconnecting so much easier. In addition, very easy to install.

Still works like a charm
Dave F - 05/02/2021


Used package foam from lift and installed it inside of the bag. Works perfect


this jack works perfectly my trailer is heavy!!!


Sometimes the controls seem to delay but other than that has been a great jack.


Have not installed looking forward to seeing how well it works

Show More Reviews

See what our Experts say about this Ultra-Fab Products Trailer Jack

  • Length and Gauge of Wires of the Phoenix Electric Trailer Jack # UF38-944040
    The wires of the Phoenix Electric Trailer Jack # UF38-944040 are 10 gauge and 81 inches long.
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  • Why Does My Electric Trailer Jack Beep when the Trailer is Not Hooked Up
    If you have Phoenix Electric Trailer Jack - A-Frame - 22-1/2" Lift - 4,000 lbs Item # UF38-944040 it will show a red light when there is a low voltage situation. There could still be a low power situation though so you could have the battery on the trailer tested. If it is a different brand jack there may be something to indicate why it is beeping in the manual. If you do not have the manual tell me the make and model of the jack and I can see if I can find more information on it. In...
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  • Could Powered A-Frame Jack be Powered From Breakaway Battery
    You would not want to connect a powered a-frame trailer jack to a breakaway battery like you mentioned. The battery would not have enough power to operate the jack. You'd want to put a second battery on your trailer that would be used for powering the jack or draw the power for the jack from the 12 volt accessory circuit of the trailer wiring.
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  • Phoenix Electric Trailer Jack Mounting Bracket to the top of the Jack Dimensions
    The total height from the mounting flange to the top of the Phoenix Electric Trailer Jack Phoenix Electric Trailer Jack is 22.75". The overall height is 33". I have attached a diagram for your reference.
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  • Troubleshooting Phoenix 4000 Electric Jack Not Working
    Phoenix Electric Trailer Jack - A-Frame - 22-1/2" Lift - 4,000 lbs # UF38-944040 sounds like it needs a better ground connection. You can wire it directly to the battery like in the installed video or you can install the ground wired to the trailer frame directly with a bare metal to metal connection. The battery itself may need a charge so I'd check that out as well by connecting to a different battery or charging the trailer battery then reconnecting the jack. If the red LED flashes...
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  • Electric jack Recommendation for 2018 Jayco Jay Flight 242BHSW
    The electric jack I would recommend for your 2018 Jayco Jay Flight 242BHSW is the Phoenix Electric Jack part # UF38-944040 as this is the fastest electric jack out there. Travel speed (w/ 1,000-lb tongue weight): Extends 6" in 9.5 seconds Retracts 6" in 8.6 seconds Most electric jacks are pretty slow but this one is very quick. I attached a review video for this for you to check out as well.
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  • Troubleshooting Phoenix Electric Trailer Jack for Beeping
    When we have seen this before with the Phoenix Electric Trailer Jack, # UF38-944040 it frequently is from an improper voltage reading. The unit is shutting itself off for protection. Please verify that your battery bank is fully charged and in good working order then check all the wiring connections for the jack ensuring you have a good ground.
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  • Memory Settings for Phoenix Electric Trailer Jack if Power Removed
    I confirmed with the manufacturer that yes, the Phoenix Electric Trailer Jack, # UF38-944040 can be disconnected from power source and it will still retain its memory settings.
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  • Replacement Powered A-Frame Jack to Replace 3,500 lb Jack that Failed
    Trailer jacks do sometimes fail even when they are being used under their capacity so while it's a bummer that yours did I wouldn't say you did anything wrong and maybe just had some bad luck with yours. For a replacement I really like the Phoenix Electric Trailer Jack part # UF38-944040 which has a slightly higher capacity at 4k but what I really like about it is that it is incredibly fast. It can fully extend or retract in less than 10 seconds. It also has a reputation as being very...
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  • What is the Dimension From the Mounting Plate to the Top of the Phoenix Electric Jack
    The measurement from the mounting plate to the top of the jack on the Phoenix Electric Trailer Jack # UF38-944040 is 22.75".
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  • Recommended Fast Electric A-Frame Jack for 12K Trailer
    The Phoenix Electric Trailer Jack part # UF38-944040 will be an excellent option for a 12,000 lb trailer as it only needs to cover the max tongue weight which at 15% would only be around 1,800 lbs. This is one of the fastest jacks on the market with up to 10" of travel in 18 seconds. It also has an industry leading 10-year warranty.
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  • Cover Recommendation for Phoenix Electric Trailer Jack # UF38-944040
    The Ultra Fab jack cover part # UF38-944020 is the recommended cover for the Ultra-Fab jack part # UF38-944040. This will fit the jack perfectly.
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    The Ultra-Fab Phoenix Electric Trailer Jack with Remote- 5,500 lbs # UF38-944055 or 4,000 lb # UF38-944040 without remote sounds like it may have a mechanical issue. I recommend using the manual crank to extend or lower the jack. If you can use this, then you isolate the issue to electrical with a possible bad ground or motor issue. If you can't physically move the jack with the manual crank then we know the issue is mechanical with the inner rod seized or having stripped threads. If...
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  • Is Replacement Bolt for Head of Husky Brute Jack Available
    I reached out to my contact at Husky and she said that those bolts aren't available as replacement parts so if you are outside of the 1-year warranty then the only option is to replace the jack. I recommend the Phoenix Electric Trailer Jack # UF38-944040 which has a slightly lower rating at 4,000 lbs but it boasts an impressive travel speed of 10" in 18 seconds. The upgraded version of the Phoenix is part # UF38-944055 which has a higher weight capacity at 5,500 lbs and comes with a remote...
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  • Troubleshooting Wiring on Ultra Fab Electric Trailer Jack
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  • Does Phoenix Electric A-Frame Trailer Jack Have Auto Retract
    The Phoenix Electric Trailer Jack # UF38-944040 retracts with the simple push of a button, so if that is what you meant by "auto retract function" then yes, it certainly does. These buttons are also how it extends, and the accompanying photo shows exactly where these buttons are located on the front of the jack. The Phoenix has a 4,000 lb capacity, offers 22-1/2" of total travel and is an easy bolt-on installation. It is also possible you were referring to something like the Lippert...
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  • Can the Phoenix Electric Trailer Jack Be Rotated For Tailgate Clearance
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  • What Capacity Electric A-Frame Jack for 7,000 lb Trailer
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  • What Capacity for Electric Jack Would be Needed for 5,000 lb Trailer Jack
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