Helical cut gears in the latest diff ??

Gregg C · 01-25-2012, 04:48 PM

Does anyone know FOR SURE if Helical cut gears are in the latest rear diff ??
If so it must be substantially quieter.

Gregg C · 02-02-2012, 05:00 AM

Any info out there on this ??

XTCntn · 02-02-2012, 05:25 AM

I doubt it very, very seriously

Although, I DO NOT know for sure

rksampson · 02-02-2012, 05:59 AM

I don't know for sure but I have a 2012 x and I don't have that whining noise everyone talks about

Gregg C · 02-02-2012, 06:11 AM

Is your rear diff a 506 ?

XTCntn · 02-02-2012, 06:18 AM

Front 3rd member is the same: 645 last 3 digits
179 705400645 Differential (front diff 2012 1000 Limited)

2011:Actually have 2 diff part numbers for the rear, 411 & 391
No helical gears
2012: still has 506 assembly
Still no helical gears

Parts diagram and part numbers

BRP -- Parts Catalogs

Gregg C · 02-02-2012, 06:32 AM

Thanks for the info,
I went for a ride in a 2012 "X" yesterday and the noise at speed was less than half of mine. My diff is a 411.
It would seem the 506 has solved the rear diff whine problem ?? Yes / No ??

XTCntn · 02-02-2012, 06:48 AM

Me thinks it's all in the setup of the backlash, same guts in the case.
My 411 is pretty loud at times and my warranty just ran out on Jan. 27th
I think I'm going to fill the rear with Royal Purple 75/140 and see if that has any effect at all. If it does, I might just pull the diff and see how much backlash it actually has, also end shaft play. With the way forged gears wear (notice the "glitter" in the diff oil), when you change it, I'm sure that the backlash could use some attention ............ JMO

Mud Yapster · 02-02-2012, 07:02 AM

Quote: Originally Posted by XTCntn

Me thinks it's all in the setup of the backlash, same guts in the case.
My 411 is pretty loud at times and my warranty just ran out on Jan. 27th
I think I'm going to fill the rear with Royal Purple 75/140 and see if that has any effect at all. If it does, I might just pull the diff and see how much backlash it actually has, also end shaft play. With the way forged gears wear (notice the "glitter" in the diff oil), when you change it, I'm sure that the backlash could use some attention ............ JMO

You must be right, I change my rear diff oil about every 50 hours and it always has a lot of glitter and looks dirty.

XTCntn · 02-02-2012, 07:08 AM

Adding backlash a minute bit at a time, constantly and never ending

01-25-2012, 04:48 PM	#1
Gregg C [OP] Senior Member Join Date: May 2011 Location: Albuquerque Member #2436 Posts: 317 ()	Helical cut gears in the latest diff ?? Does anyone know FOR SURE if Helical cut gears are in the latest rear diff ?? If so it must be substantially quieter. __________________ Gregg 2011 Commander "X" BRP Top Viper Winch Synthetic Rope K & N Air Filter MrRPM Spin On Filter Garmin 650T Digital Gauge PKG. Kolpin Windshields CVT Blower ///AIRDAM Clutch Factory UTV Spacers Whips/Flags Last edited by Gregg C; 01-25-2012 at 04:53 PM.

02-02-2012, 05:00 AM	#2
Gregg C [OP] Senior Member Join Date: May 2011 Location: Albuquerque Member #2436 Posts: 317 ()	Any info out there on this ?? __________________ Gregg 2011 Commander "X" BRP Top Viper Winch Synthetic Rope K & N Air Filter MrRPM Spin On Filter Garmin 650T Digital Gauge PKG. Kolpin Windshields CVT Blower ///AIRDAM Clutch Factory UTV Spacers Whips/Flags

02-02-2012, 06:11 AM	#5
Gregg C [OP] Senior Member Join Date: May 2011 Location: Albuquerque Member #2436 Posts: 317 ()	Is your rear diff a 506 ? __________________ Gregg 2011 Commander "X" BRP Top Viper Winch Synthetic Rope K & N Air Filter MrRPM Spin On Filter Garmin 650T Digital Gauge PKG. Kolpin Windshields CVT Blower ///AIRDAM Clutch Factory UTV Spacers Whips/Flags

02-02-2012, 06:18 AM	#6
XTCntn Senior Member Join Date: Nov 2010 Location: NorthEast TN Member #1138 Posts: 549 ()	Front 3rd member is the same: 645 last 3 digits 179 705400645 Differential (front diff 2012 1000 Limited) 2011:Actually have 2 diff part numbers for the rear, 411 & 391 No helical gears 2012: still has 506 assembly Still no helical gears Parts diagram and part numbers BRP -- Parts Catalogs Last edited by XTCntn; 02-02-2012 at 06:26 AM.

02-02-2012, 06:32 AM	#7
Gregg C [OP] Senior Member Join Date: May 2011 Location: Albuquerque Member #2436 Posts: 317 ()	Thanks for the info, I went for a ride in a 2012 "X" yesterday and the noise at speed was less than half of mine. My diff is a 411. It would seem the 506 has solved the rear diff whine problem ?? Yes / No ?? __________________ Gregg 2011 Commander "X" BRP Top Viper Winch Synthetic Rope K & N Air Filter MrRPM Spin On Filter Garmin 650T Digital Gauge PKG. Kolpin Windshields CVT Blower ///AIRDAM Clutch Factory UTV Spacers Whips/Flags

Helical cut gears in the latest diff ??

can am commander 506 rear differential

forged gears dirty

commander viper winch

02-02-2012, 05:25 AM	#3
XTCntn Senior Member Join Date: Nov 2010 Location: NorthEast TN Member #1138 Posts: 549 ()	I doubt it very, very seriously Although, I DO NOT know for sure

02-02-2012, 05:59 AM	#4
rksampson Senior Member Join Date: Oct 2011 Location: boonville indiana Member #3622 Posts: 211 ()	I don't know for sure but I have a 2012 x and I don't have that whining noise everyone talks about

02-02-2012, 06:48 AM	#8
XTCntn Senior Member Join Date: Nov 2010 Location: NorthEast TN Member #1138 Posts: 549 ()	Me thinks it's all in the setup of the backlash, same guts in the case. My 411 is pretty loud at times and my warranty just ran out on Jan. 27th I think I'm going to fill the rear with Royal Purple 75/140 and see if that has any effect at all. If it does, I might just pull the diff and see how much backlash it actually has, also end shaft play. With the way forged gears wear (notice the "glitter" in the diff oil), when you change it, I'm sure that the backlash could use some attention ............ JMO

02-02-2012, 07:02 AM	#9
Mud Yapster Senior Member Join Date: May 2011 Location: Earth Member #2464 Posts: 1,327 ()	Quote: Originally Posted by XTCntn Me thinks it's all in the setup of the backlash, same guts in the case. My 411 is pretty loud at times and my warranty just ran out on Jan. 27th I think I'm going to fill the rear with Royal Purple 75/140 and see if that has any effect at all. If it does, I might just pull the diff and see how much backlash it actually has, also end shaft play. With the way forged gears wear (notice the "glitter" in the diff oil), when you change it, I'm sure that the backlash could use some attention ............ JMO You must be right, I change my rear diff oil about every 50 hours and it always has a lot of glitter and looks dirty. __________________ Commander XT/X 1000 *The* *Mud Mafia* *You hit this we hit you!!!!*

02-02-2012, 07:08 AM	#10
XTCntn Senior Member Join Date: Nov 2010 Location: NorthEast TN Member #1138 Posts: 549 ()	Adding backlash a minute bit at a time, constantly and never ending

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