Never use thicker fluid than hydraulic oil in the Hilliard Front Differential... use only Polaris Demand Drive Fluid, ATF or Tractor Hydraulic Fluid.I just did the shim change today since I lost out on a sale this week. The guy back out out because of the noise. Just remove the driveshaft and you can feel the gears clunking. When it was out I took a diamond file to the edges of the gear. Replaced everything and filed the differential with some 140 at Belray gear oil. The old crap is like 30 et. The end result is not a bit of noise from the front end.??. It's only about an hour fix if you have the correct snap ring pliers
Any update on this shaft or this entire thread? I bought a used 2016 8 months ago and have gone back and forth over whether or not I have this issue. Yes, my diff is the 3344 or what not, the one we DON'T want. I jacked my rear end up the other day but didn't feel I had it jacked up on stands safe enough to get to 30 mph so I let it back down. Since then I haven't had time to look at it.I just ordered an RCV one piece driveshaft for my XP1K..... They say that’s the cure for the vibes..... I’ll give an update once it’s in.
Sent from my iPhone using Tapatalk
Anything results yet?Thanks to the OP for starting this thread, that was a long read.
I have a 2017 XP4 1000. I had 1700 miles on the diff and it was dead quiet. I then sold that diff and put a 2019 XPT diff in so I could run the larger turbo axles. The 2019 diff I have is 1334182 and sounds like a can of marbles, seems like it starts around 10 mph and gets bad around 25-30 mph.
When I installed this diff I installed the Sandcraft internals as well and noticed the pinion had a shim(my 2017 did not), I did not yet know about this thread and installed it the way it was. I put 500 miles on it dealing with the noise and just got around to pulling it out and inspecting it.
The internals look mint, absolutely no damage. The wear pattern on the pinion gear is in a very specific spot near the base of the teeth. Easy to see in the pic.
View attachment 664741
I found this thread after researching the “marbles in a can” noise. The OP only had .010” between the housing and pinion gear, I have .021”. My shim is .020. The wear pattern on the pinion seems less than ideal, my 2017 pinion gear had a much more even wear pattern. I’m going to swap the shim and I’ll report back if the noise goes away.