The signals to send power to your brakes through your brake pedal and through the manual override on your Tekonsha P3 # 90195 are completely separate so it sounds like there is an issue stemming from either the trailer wiring or brake assemblies.
Start by making sure your brake assemblies are properly adjusted. Use a tool like # W80630 (as shown in the "Trailer Brakes and Wiring Installation" video below) to turn the star wheel until the drum tight enough that it is barely able to be turned... view full answer...
For your tires, I recommend going with the Erickson Wheel Net, # 77314. This wheel net will accommodate your front and rear tires and they will have more than enough capacity to hold your RZR to the E-track system on your trailer.
Another items that we've found very helpful when loading ATVs and UTVs is the Erickson E-Chock, # EM09162-2. I typically try to park the UTV in the same spot over the axles to make sure I have the correct weight distribution on the trailer and these chocks make... view full answer...
For your 2011 Polaris Ranger RZR 900 XP the correct winch mount is the part # BDW15167 which then will work well with the Superwinch LT3000 part # SW1130220 that you also mentioned. view full answer...
RV makers don't keep track of items such as the door railings that they install on their trailers but since the Lend-a-Hand Extra Large Folding Grab Handle # AM-533 can fold in either direction it should work great for your Grand Design 385TH toy hauler. The distance between the mounting brackets is 19-1/4-inches so you can compare this to your handle mounts. If you cannot find a door stud for mounting you can locally source long bolts and a plate to provide a secure mounting point. Four... view full answer...
The 11-13/16" wide measurement on the Trailair Air Ride 5th Wheel Pin Box part # LC158778 that replaces the 1621 HD pin box is standard. I was able to confirm this with the engineers at Lippert. Once you torque the bolts down the brackets on the trailer will pull in and that is completely normal. It will not put stress on the frame, replacement pin boxes are made to be a bit narrower then your brackets on the trailer so they can easily fit into place while installing. Otherwise you would... view full answer...
We have the custom winch mount part # BDW15182 which is a fit for your 2016 Polaris RZR XP 4 turbo that you can then use with the synthetic rope Superwinch Terra ATV Winch # SW1145230. view full answer...
Airaid Powersport SynthaFlow Direct-Fit Replacement Premium Oiled Air Filter # AR850-352 is a confirmed fit for your Polaris XP900. I suggest the cleaning and oiling kit # AR790-551 to keep the filter in top condition. view full answer...
For your 2016 Polaris RZR 1000 S the Bulldog Winch mount part # BDW15182 is a confirmed fit. This winch plate will work with a Warn 4000 winch also. view full answer...
We have the Bulldog Winch Mount part # BDW15167 which is a confirmed fit for your 2013 Polaris RXR-4 XP 900.
You could use it with the part # BDW15001. view full answer...