That 's not exactly the story I got recently, as I just tried to order the parts by number for my 4400, 18K hitch and the guy I talked to (Julius Webster) was going to check into the availability and cost. I don't believe the story about careful fitting at the factory. But since they havn't replied, I guessing that they arn't interested in supplying. Maybe I should just go to camping world and order them from there and see if that works.
The upgrade may be expensive tho, I don't know about that. There would be two delrin slide parts, two supports (clamps) for the delrin, and a new cam plate. On another site, I saw an estimate of the parts cost of about $250 if you are just replacing them, but Pullrite might want to charge much more than that to disincentify the purchaser.
Here is the information posted, that started my inquiry...
They may not offer a conversion kit. But I'll bet you can buy the parts. For the 18K model hitch, you need 2 of the hub surrounding Delrin slide blocks, top and bottom Delrin flange plates. And a new design carrier arm...that the Delrin parts will fit in to. And the new design adjustable stop block, and nut. The guide rails can be used. Although, the new design, uses slightly different guide rails, (with out the stop block slots). But rails with the slots will work just fine. The slide blocks are symmetrical/identical, as are the top and bottom plates. So you order two of each item. The Delrin parts will not fit into the previous (before Nov 2009) model Carrier Arm. This is why you need the new design Carrier Arm. I would imagine the Carrier Arm would be $150-$200 or so. And probably the 4 Delrin parts would be less than $25.00 each. The adjustable stop block would be $25 or less. So for about $300 plus shipping, you could have your conversion to the Delrin slide up date. Installing the new Carrier Arm is not all that difficult, if you have basic tools...and a good torque wrench. You basically remove the hitch head. Then the stop block adjusting bolt. Then the tilt yoke and leaf spring. Then unbolt the slide rails. Drop out the sliding stop block and discard it. Slide the rails to the back of the hitch...or remove them completely if you prefer. Then lift out the old Carrier arm, and discard it. Remove the cam roller assembly, and install on the new Carrier Arm. Install the Delrin inserts around the hub and on the inside of the top and bottom flanges on the new Carrier Arm. Then slide the Guide rails thru the Carrier arm flange slots, and bolt them into place to the torque spec. Install the tilt yoke and spring. Then the hitch head. Install and adjust the new stop block. The whole assembly is Simple enough. Common sense really. Nothing too technical. Takes about an hour. But does require some strength. I am not a Pull-Rite employee. But I do have in-depth knowledge related to the 18K modelPull-Rite post Nov 2009 Delrin slide model engineering, design, and prototype long term field testing. I can personally vouch for its advantages/benefits over the metal on metal slide "Slip Plate" version. The spec for WD40, is more for guide rail rust prevention than Delrin slide lubrication. But it does help the Delrin slightly. I cannot speak with authority for any other Pull-Rite model that uses Delrin slide pads. Since I had no involvement beyond the 18K model. But I'll bet other models are functionally similar. Just different part numbers.
The slip plate conversion will help alot in degreasing the hitch, I hope, and I don't need a slider anymore anyway so I will live with it. Can't hurt to try to push a little bit, especially since I only missed the cutoff to the new hitch by 6 months back in 2009. They got good engineers at pullrite and I should think they could put together a kit for all the customers of their that don't have the delrin plates, but I can understand the liability concerns.
2007 Chevy 2500HD Classic LBZ Duramax/Allison (Stock)
2005 Bigfoot 1500C8.2 AWESOME