How To Determine Which Pin Box I Have and What Replacements Are Available
Published 05/27/2015
Products Featured in This Question
Question:
Hi, I have an LCI Trailair pin box but cant read the part number any longer. I would like to identify it for potential replacement parts in the future. Heres what I can identify on the pin box 1. Trailair P/N: ????4738 ...38 for sure 2. S/N: 019-000286625 3. Mfg. Date: 02/08/2011 Can you determine the part number from this information? Also, is it possible to retrofit the Lippart Trailair 1621 HD with a rotoflex pivoting head or Tri-glide air ride pin box to limit chucking? If yes, what would be the cost and part number? Thanks for your help!
asked by: Jim
Expert Reply:
I spoke with my contact at Trailair and from your serial number we were able to determine that your trailer came with a 1621 HD pin box which is a long pin box style. I was unable to obtain the exact part number for your Trailair pin box but from the picture that you provided, it looks as though someone may have replaced the original long style pin box with a medium style. In order to determine this you will just need to take a quick measurement from the back row of bolts to the center of the king pin. I have attached a diagram and an article regarding this measurement.
When it comes to a replacement pin box that will drastically reduce chucking, absorbs road shock, and minimizes bounce, I recommend going with the Flex Air which is Trailair's replacement for the Tri-glide model.
For example, if your 3b (marked in the picture) measurement equals 25-5/8 inch you have the long style pin box and could use the Trailair Flex Air 5th Wheel Pin Box, # LC328492, for a direct replacement.
If your 3b measurement equals 16-7/8 inch you have the medium style pin box and could use the Trailair Flex Air 5th Wheel Pin Box, # LC328484, for a direct replacement.
Prices are listed on each product's page.
Product Page this Question was Asked From
Trailair Flex Air 5th Wheel Pin Box - Lippert 0719 - 18,000 lbs
- 5th Wheel Pin Box
- Upgraded Pin Box
- Absorbs Road Shock and Reduces Chucking
- 18000 lbs
- Air Ride Suspension
- Fixed Turret
- Lippert 0719
- Lippert
more information >
Featured Help Information
Miscellaneous Media
Continue Researching
- Search Results: 5th wheel gooseneck adapter
- Shop: Fifth Wheel Hitch
- Article: 4 Steps to Choosing Your 5th Wheel Pin Box
- Shop: Gooseneck Hitch
- Search Results: gooseneck hitch
- Search Results: 5th wheel pin box
- Shop: Suspension Enhancement
- Shop: MORryde GooseTech 5th Wheel to Gooseneck Pin Box for 18K+ Trailers w/ Lippert Rhino
- Search Results: fifth wheel hitch
- Search Results: goosetech
- Shop: Gen-Y Hitch Shock Absorbing 5th Wheel to Gooseneck Pin Box - Lippert 1621/1621HD - 30K GTW - 4.5K TW
- Shop: Gen-Y Hitch Nomad 5th Wheel to Gooseneck Pin Box - 1621,1116, 1716 - 30K GTW - 6.5K TW
- Shop: MORryde GooseTech 5th Wheel to Gooseneck Pin Box for 18K+ Trailers w/ Lippert 1116
- Search Results: hitch adapters
- Shop: Curt Air Ride 5th Wheel Pin Box - Lippert 1621 & 1621HD - 21,000 lbs
- Shop: Curt Flex Air 5th Wheel Pin Box - Lippert 1621 - 21,000 lbs
- Shop: MORryde GooseTech 5th Wheel to Gooseneck Pin Box for 18K+ Trailers w/ Lippert 1621
- Q&A: Which MORryde GooseTech Pin Box Fits 2026 Brinkley G3950
- Q&A: Are Spacers Needed with Installing Gen-Y Nomad Gooseneck Adapter in Place of Lippert 1716
- Shop: Trailer Wiring
- Search Results: morryde 5th wheel gooseneck adapter
- Q&A: What Size Hitch Pin Holes Come with Reducer Sleeve for Super Titan Hitch Receivers
- Q&A: How to Determine the Pin Box Manufacturer and Model on a 5th Wheel Trailer
- Shop: Tonneau Cover
- Video: Review of MORryde 5th Wheel Gooseneck Adapter - GooseTech 5th Wheel To Gooseneck Pin Box - MR99MV
- Video: Smoother Towing Solution: Gen-Y Hitch Nomad 5th Wheel to Gooseneck Pin Box
- Q&A: Which MORryde Goosetech Pin Box to Gooseneck Adapter Fits in Place of MORryde RTPB83-1622
- Q&A: Will Upgrading To MORryde GooseTech Pin Box Change Bed Rail Clearance?
- Q&A: Will I Still Need Slider Hitch On F250 Short Bed When Switching To Gen-Y Nomad Gooseneck Adapter?
- Video: Review of the Curt Flex Air 5th Wheel Pin Box
on 5th Wheel Pin Box
