Question about ongoing issue with clunk, rear axles

[Papa Hoc]

New to Polaris and the forum. Have a 25 with about 50 miles on it noticeable clunk on/ off throttle in the rear assuming it’s the drive axle issue. A clunk is abnormal movement – are the axle bolts coming loose and allowing the joint to shift forward and backward or is the issue different? It seems as if anytime the axles were removed to replaced, the noise goes away at least for a short period, which leads me to believe it has to do with the bolt holding the axle to the flange. Has anyone considered this and looked into perhaps automotive grade fasteners, different torque values, lock washers, or thread lock compound? I own an automotive shop and have been in the industry all my life and I remember back I think early 70s where Volkswagen had issues with CV joints working loose. They made a special washer to use to lock them on and if you didn’t install them, those damn axles would literally fall off within 100 miles! Anyhow, I’m kind of a risk taker and keep an open mind to ideas people may have and be happy to guinea pig them if they seem reasonable so don’t hold back!Waiting to hear and thanks to all.

 

[Clubin]

Tons of this in here. Do a search.

 

[Papa Hoc]

I did and maybe I’m unfamiliar with the process on this forum, but I didn’t see anything except Axel issues.

 

[Captain Bob]

My 2025 had the clunk pretty much from the start, my dealer tried a few things with no success. Anyway took it to another dealer and just a couple weeks before that they got a bulletin from Polaris, this is what it said:
Polaris Bulletin R-24-09-01
"If a RANGER XD 1500 is experiencing a clunking noise from the rear of the vehicle, technicians will inspect the rear hub and driveshaft areas to identify the source. In cases where the noise is coming from these components, Polaris has confirmed that it does not indicate damage or mechanical failure, and the vehicle can continue to be used. As part of the service process, technicians may apply a thread‑locking compound to the rear driveshaft and yoke components. Polaris is continuing to review this condition and will provide updates if additional guidance becomes available."
So far my clunk is completely gone, the axles were done months ago with no success so I have to believe that it was the locktite on the yoke that fixed the problem.

 

[TSkeen]

Put the vehicle in park and put your hand on the rear driveshaft where it enters the rear differential
Get someone to rock it back and forth and you can feel the clunking coming from inside the differential.
At least that is where mine is creating a noise from.
It is getting worse as I keep driving it. Polaris says it's not a mechanical failure, so as of now, they won't work on it.
I'm sure the mechanical failure will occur before long.

 

[Papa Hoc]

I have confirmed rear differential failure. I have checked with tuners and they say it is rare but can happen. I didn’t know this, but I guess it’s pretty common to set them up too loose and have the failure I have experienced. A new shiny differential with a properly torqued yolk should solve the problem for me long-term.

I checked my axle torque. It was a little low, but correcting it made absolutely no difference. One tuner, Mike at aftermarket assassins, has over 6000 miles on his including 1500 on a Dino and has not had differential problems, but all three seals are leaking, the driveshafts move up and down in the differential and the fluid is full of metal shavings. I have appointment next month on the 19th. No one makes upgraded ones, but I don’t think that is necessary as again this is simply just an incorrectly torqued yolk that caused a misalignment between the pinion and Ring gear. Two things more real quickly – I saw where one owner had his yoke re-torqued
and the noise went away – highly recommend you check your oil for metal. It may be still under warranty and maybe not too late if there is some in there as you may have a failure long-term. I have never heard of a yoke being retorqued after noise and it correcting it permanently. Also, Mike at aftermarket assassins has an amazing product for that vehicle, a dual muffler and a tuner that I’m really looking forward to trying out. I’ll get you guys updated when it’s fixed and then done being updated with the tuner and the dual free flow muffler. Check the stuff out it’s cool!

 

[bchar1]

Tons of this in here. Do a search.

I do not have the problem as of yet.
I did speak to my dealer last week
And one of the amwers to the problem .that the problem has always been their. But the XD1500 is so much QUIETER that we. All hear it now.
I don't know how I feel about that .
Any input to that thought?

 

[Big Red]

My input..........Your dealer just tried to insult your intelligence, and if he actually believes his own bullshit then he insulted his own!

 

[Papa Hoc]

These issues and designs are very similar to automotive and I have best experience there to include Shop ownership of a large single facility independent automotive import and domestic Shop doing over $2.5 million in sales annually. Not bragging guys, just saying I’ve got true legitimate experience here. While loose splines on an axle and hub can make a clicking noise on and off throttle, in most cases, a breakdown is not eminent. It would require an extensive amount of wear and ignoring the noise for that axle splines to finally wear enough to slip and strip.

Now on differential failures, this situation can be very different. The most common issue that people see under a warranty is an improperly preloaded Pinion/ Ring gear adjustment. This allows the opinion to try to “walk” up and down the Ring gear and it binds making popping noise. It causes abnormal load on bearings which fail and in extreme cases if the opinion can walk enough, its teeth will align with one of the teeth on the Ring gear and literally force the case apart and cause the unit to literally explode.
Once audible clicking from a differential is heard it is too late. It cannot be simply readjusted or have that opinion reloaded properly. The damage is already done. Even if it’s minor and quiet after adjusted, it will fail out of warranty, and you’ll be ending up buying a differential. Don’t let the dealer tell you that it’s normal, or you’ll be walking home on one of those rides. Also, don’t let them identify the issue and tell you, they simply readjusted the load on the pinion. They’ll be internal damage that may not show up right away. Best of luck to everyone. One last thought as a proofread this. I took a sample of my oil in a small plastic see-through cup, so I would have proof of the internal wear. Easy to do might want to recommend that if any of you guys have differential failures and you’re getting ready to take it in for repair. They should be rare as it’s not a design flaw just an issue with them not correctly assembled.

 

[Papa Hoc]

Still figuring out this forum on my cell phone I guess I ended up putting the first part of my comment up in the other for members thread. My bad. Just look up to where it starts off with mentioning the system similar to automotive. That’s the first part of my comment sorry guys.