Rear diff - Polaris ATV Forum
Polaris Sportsman XP 1000 Discuss the Sportsman XP 1000 and Sportsman Touring XP 1000 here.

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post #1 of 10 (permalink) Old 02-17-2018, 03:53 PM Thread Starter
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Rear diff

I have a 2015 sportsman 1000 that I recently purchased. While playing in the snow today in 2wd it seemed to start clattering and sending power to one rear then the other and back and forth kind of like in a truck.only did it when I was taking off and the rear tires were trying to find traction. I was only giving light to medium throttle. Is this normal and if not any ideas on what it is.. also seemed to do it while drifting.. the shaking and clattering was pretty bad.. thanks in advance for advice

Last edited by Andymcc; 02-17-2018 at 04:03 PM.
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post #2 of 10 (permalink) Old 02-17-2018, 05:10 PM
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I have a 1000, 2017 2up, I have been riding in the snow a lot. This has not happened to me. Mind you I have been a tame rider as I am in brake in mode. Just finished my 50 hr service, I guess I can giver a bit more now, I donít have the newer up grade front pinion cover yet so Iím staying tame for now.


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post #3 of 10 (permalink) Old 02-17-2018, 05:21 PM Thread Starter
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Thanks for reply.. makes me nervous!
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post #4 of 10 (permalink) Old 02-17-2018, 05:32 PM
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Thanks for reply.. makes me nervous!
Ya, I hope others will chime in. Iíve not hear of this.


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post #5 of 10 (permalink) Old 02-17-2018, 06:18 PM
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So..even though I do not have a 1000. The 850s and 1000s probably have very similar rear differential setup. Now one thing I am not sure of is if they offered the 1000s with a turf mode. You didn't mention you have turf mode so I would assume you don't. The rear differentials would be different internally if you did and could cause a problem that you are explaining. So I've rebuilt a few 850 rear diffs. Internal, it's one solid piece for the ring gear / center shaft. So I do not see how it could transfer power independently. I would first start with draining the rear diff oil. Check the drain plug for metal chunks. Could indicate if a tooth on a gear broke. Now, were you in 4WD? The 1000s had the pinion cover plate braking. Could the sound be misleading and actually coming from the front? So the first step I would do is drain and service both front and rear diffs to check for metal.

Also check your rear drive shaft to make sure the bolts that secure it to the pinion cover are tight and not loose.
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post #6 of 10 (permalink) Old 02-17-2018, 06:54 PM Thread Starter
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I was in 2wd, and my front pinion cover looks fine. Also does not do this all the time. Only when low traction when it’s trying to gain traction, on pavement and high traction area it doesn’t do it at all.. also does not do it as bad when you are already rolling.. just if you take off in 2wd like taking off in a field with a few inches of snow in 2wd. I don’t know if it is the turf diff. also I could be wrong about the power transfer.. maybe it could be just clattering and shaking and it only seems to me like there is a power transfer going on like what would be in a pickup in 4x4 in snow or mud. Only thing is I was in 2 wd with only the rears spinning.

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post #7 of 10 (permalink) Old 02-17-2018, 07:04 PM
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Rear diff

Dose it sound like this?

https://www.polarisatvforums.com/foru...d.php?t=161081
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2017 sportsman 850sp
Cecco pinion cover
Carbon fiber valve stem caps
Billet aluminum gas cap
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Rear Polaris led brake light
Atv guru front Bumber
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2018 sportsman 1000XP
RVS stage 1 tune
Iron baltic A arm guards front and rear
26" Bighorn tires
Billit aluminum Polaris shifter
Carbon fiber valve stem caps
Billit aluminum gas cap
Polaris lock n ride rear storage box
Rear rack extender
Front Polaris extreme bumper
Rear polaris extreme bumper
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post #8 of 10 (permalink) Old 02-17-2018, 07:17 PM Thread Starter
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That describes it pretty accurate except I was in 2wd. Not sure if it’s the same thing it has 27in tusk trilobite 8 ply. Do you think it could be the same thing happening, only with just the rears spinning?

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post #9 of 10 (permalink) Old 02-17-2018, 08:54 PM
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Originally Posted by Andymcc View Post
That describes it pretty accurate except I was in 2wd. Not sure if itís the same thing it has 27in tusk trilobite 8 ply. Do you think it could be the same thing happening, only with just the rears spinning?

My guess is it is the same thing happening but I am by no means a expert. My machine will do it in the snow in 2wd as well. To make mine stop doing it I need to either change speeds or stop. I usually just stop so I donít break anything.
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2017 sportsman 850sp
Cecco pinion cover
Carbon fiber valve stem caps
Billet aluminum gas cap
Hand and thumb warmer
Rear Polaris led brake light
Atv guru front Bumber
Elka stage 3 shocks
Wife's

2018 sportsman 1000XP
RVS stage 1 tune
Iron baltic A arm guards front and rear
26" Bighorn tires
Billit aluminum Polaris shifter
Carbon fiber valve stem caps
Billit aluminum gas cap
Polaris lock n ride rear storage box
Rear rack extender
Front Polaris extreme bumper
Rear polaris extreme bumper
3500# polaris winch
Hays Fab Led headlights & grill
Rear Polaris led brake light
Cup holder storage bag
Hand and thumb warmers
Hand guards
Elka stage 3 shocks
Mine
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post #10 of 10 (permalink) Old 02-18-2018, 03:41 AM Thread Starter
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Thanks for the feedback everyone. Changing all fluids today and will see what happens.
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