1999 Polaris Scrambler 400 4x4 where does my rotor mount to on my rear axle? - Polaris ATV Forum
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post #1 of 33 (permalink) Old 07-06-2019, 07:01 PM Thread Starter
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1999 Polaris Scrambler 400 4x4 where does my rotor mount to on my rear axle?

I have a 99 scrambler 400 4x4 I just picked it up a few days ago for $1500, only issue is this I have no rear brakes. I have a new caliper and mounts for the caliper but no rotor and I don’t know what I need to make the rotor fit the rear axle, there aren’t any teeth on the axle for the rotor to go on so I’m confused as to how it mounts. Please let me know what I need to mount the rear rotor.
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post #2 of 33 (permalink) Old 07-07-2019, 05:44 AM
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Quote:
Originally Posted by Jaggerd View Post
I have a 99 scrambler 400 4x4 I just picked it up a few days ago for $1500, only issue is this I have no rear brakes. I have a new caliper and mounts for the caliper but no rotor and I donít know what I need to make the rotor fit the rear axle, there arenít any teeth on the axle for the rotor to go on so Iím confused as to how it mounts. Please let me know what I need to mount the rear rotor.
You've got a bunch of parts missing. I'm not sure if that's even the OEM axle.
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post #3 of 33 (permalink) Old 07-07-2019, 05:45 AM
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Post some more pics of the entire housing and axle. What about the brake lines?
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post #4 of 33 (permalink) Old 07-07-2019, 05:52 AM
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Here's the best pic of the rear brake from the service manual
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post #5 of 33 (permalink) Old 07-07-2019, 06:54 AM Thread Starter
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Post some more pics of the entire housing and axle. What about the brake lines?

I have all the mounting for the caliper. As well as a new brake line to run from handle bar switch to back. I’ve been looking up rear axles and it looks like it’s he same as this one, my housing seems oem it has the grease fitting and all the mounts line up.
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post #6 of 33 (permalink) Old 07-07-2019, 07:53 AM
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Why are you looking at an axle for a 425 Magnum? The magnum had the brake on the transmission output shaft.

Are you sure you have a Scrambler? Maybe your rear brake is on the output shaft.

What is the VIN or model number on the frame?

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post #7 of 33 (permalink) Old 07-07-2019, 08:03 AM
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The 99 Scrambler axle was used in the following models - 2002 was the only year Xplorer had the same axle and no Magnum's did.

1998 SCRAMBER 500 (W98BC50A) - Rear Housing
1998 SCRAMBLER 400 (W98BC38C) - Rear Housing Scrambler 400
1999 SCRAMBLER 400 (A99BG38CA) - Rear Housing
1999 SCRAMBLER 400 (A99BG38CB) - Rear Housing
1999 SCRAMBLER 500 (A99BG50AA) - Rear Housing
1999 SPORT 400 (A99BA38CA) - Rear Housing
2000 SCRAMBLER 2X4 (A00BA38CA) - Rear Housing
2000 SCRAMBLER 400 (A00BG38CA) - Rear Housing
2000 SCRAMBLER 500 (A00BG50AA) - Rear Housing
2001 SCRAMBLER 400 2X4 (A01BA38CA) - Rear Housing
2001 SCRAMBLER 500 2X4 (A01BA50AA) - Rear Housing
2001 SCRAMBLER 500 2X4 (A01BA50AB) - Rear Housing A01ba50aa
2001 SCRAMBLER 500 4X4 (A01BG50AA) - Rear Housing
2001 SCRAMBLER 500 4X4 (A01BG50AB) - Rear Housing A01bg50aa
2002 SCRAMBLER 500 2X4 (A02BA50AA) - Rear Housing /Ab
2002 SCRAMBLER 500 2X4 (A02BA50AB) - Rear Housing A02ba50aa/Ab
2002 SCRAMBLER 500 4X4 (A02BG50AA) - Rear Housing /Ac
2002 SCRAMBLER 500 4X4 FREEDOM (A02BG50AC) - Rear Housing A02bg50aa/Ac
2002 SCRAMBLER 400 2X4 (A02BA38CA) - Rear Housing
2002 SCRAMBLER 400 4X4 (A02BG38CA) - Rear Housing
2002 SCRAMBLER 500 2X4 (A02BA50AA) - Rear Housing /Ab
2002 SCRAMBLER 500 2X4 (A02BA50AB) - Rear Housing A02ba50aa/Ab
2002 SCRAMBLER 500 4X4 (A02BG50AA) - Rear Housing /Ac
2002 SCRAMBLER 500 4X4 FREEDOM (A02BG50AC) - Rear Housing A02bg50aa/Ac
2002 TRAIL BLAZER (A02BA25CA/CD) - Rear Housing A02ba25ca/Cb/Cd
2002 TRAIL BLAZER FREEDOM (A02BA25CB) - Rear Housing A02ba25ca/Cb/Cd
2002 TRAIL BOSS (A02CA32AA/AB) - Rear Housing
2002 XPLORER 400 (A02CG38CA) - Rear Housing
2002 XPLORER 4X4 (A02CG25CA) - Rear Housing
2003 SCRAMBLER 500 4X4 (A03BG50AA) - Rear Housing
2003 TRAIL BLAZER 250 (A03BA25CA/CB) - Rear Housing
2003 TRAIL BLAZER 400 (A03BA38CA) - Rear Housing
2003 TRAIL BOSS 330 (A03CA32AA) - Rear Housing
2004 A04BA25CA TRAIL BLAZER (A04BA25CA/CB) - Rear Housing
2004 A04BG50AA SCRAMBLER 500 4X4 (A04BG50AA/FA) - Rear Housing
2004 A04CA32AA TRAIL BOSS 330 (A04CA32AA/AB/FA) - Rear Housing

The Magnum axle was used in these models:

1994 400L 4X4 (W948140) - Rear Wheel Drive Assembly 4X4 400L
1994 SPORTSMAN 4X4 (W948039) - Rear Wheel Drive Assembly Sportsman 4X4 W948040
1994 W948040 (W948040) - Rear Wheel Drive Assembly Sportsman 4X4
1995 400L 2X4 (W957540) - Rear Wheel Drive Assembly 2X4 400L
1995 BIG BOSS 6X6 400L (W958740) - Rear Wheel Drive Assembly 6X6 400L U.S. , Swedish S958740 & No
1995 MAGNUM 2X4 (W957544) - Rear Wheel Drive Assembly Magnum 2X4 (4926852685C004)
1995 MAGNUM 2X4 (W957544) - Rear Wheel Drive Assembly Magnum 2X4 (4926852685C003)
1995 MAGNUM 4X4 (W958144) - Rear Wheel Drive Assembly
1995 MAGNUM 4X4 (W958144) - Rear Wheel Drive Assembly (4926862686C009)
1995 NORWEGIAN MAGNUM 4X4 (N958144) - Rear Wheel Drive Assembly W958144
1995 NORWEGIAN MAGNUM 4X4 (N958144) - Rear Wheel Drive Assembly W958144 (4926862686C009)
1995 SPORTSMAN 4X4 (W958040) - Rear Wheel Drive Assembly Sportsman 4X4
1995 SWEDISH MAGNUM 4X4 (S958144) - Rear Wheel Drive Assembly W958144
1995 SWEDISH MAGNUM 4X4 (S958144) - Rear Wheel Drive Assembly W958144 (4926862686C009)
1995 XPLORER (W959140) - Rear Wheel Drive Assembly Xplorer 4X4
1996 400L 6X6 (W968740) - Rear Wheel Drive 6X6 400L & 6X6 400L Norwegian N968740
1996 MAGNUM 2X4 (W967544) - Rear Wheel Drive Magnum 2X4
1996 MAGNUM 4X4 (W968144) - Rear Wheel Drive Magnum 4X4 & Swedish Magnum 4X4 S968144
1996 MAGNUM 6X6 (W968744) - Rear Wheel Drive Magnum 6X6 & Magnum 6X6 Swedish S968744
1996 NORWEGIAN 400L 6X6 (N968740) - Rear Wheel Drive 6X6 400L W968740 & 6X6 400L Norwegian
1996 SPORT 400L (W968540) - Rear Wheel Drive
1996 SPORTSMAN 4X4 (W968040) - Rear Wheel Drive Sportsman 4X4
1996 SWEDISH MAGNUM 4X4 (S968144) - Rear Wheel Drive Magnum 4X4 W968144 & Swedish Magnum 4X4
1996 SWEDISH MAGNUM 6X6 (S968744) - Rear Wheel Drive Magnum 6X6 W968744 & Magnum 6X6 Swedish
1996 TRAIL BLAZER ES (W967827) - Rear Wheel Drive W968540
1996 XPLORER 300 (W969130) - Rear Wheel Drive Assembly Xplorer 300
1996 XPLORER 400L (W969140) - Rear Wheel Drive Xplorer 400L
1996 XPRESS 300 (W969530) - Rear Wheel Drive Xpress 300 & Xpress 400 W969540
1996 XPRESS 400 (W969540) - Rear Wheel Drive Xpress 300 W969530 & Xpress 400
1997 BIG BOSS 6X6 400L (N97AE38D) - Rear Wheel Drive Big Boss 6X6 400L W97ae38a
1997 BIG BOSS 6X6 400L (W97AE38A) - Rear Wheel Drive Big Boss 6X6 400L
1997 MAGNUM 2X4 (W97AA42A) - Rear Wheel Drive Magnum 2X4
1997 MAGNUM 4X4 (W97AC42A) - Rear Wheel Drive Magnum 4X4 , Swedish Magnum 4X4 S97ac42e & Norwe
1997 MAGNUM 6X6 (W97AE42A) - Rear Wheel Drive Magnum 6X6 & Swedish Magnum 6X6 S97ae42e
1997 NORWEGIAN MAGNUM 4X4 (N97AC42D) - Rear Wheel Drive Magnum 4X4 W97ac42a, Swedish Magnum 4X4 S97ac42e & Norwe
1997 SPORT 400L (W97BA38C) - Rear Wheel Drive Sport 400L & Trail Blazer W97ba25c
1997 SPORTSMAN 400L (W97AC38C) - Rear Wheel Drive Sportsman 400L
1997 SWEDISH MAGNUM 4X4 (S97AC42E) - Rear Wheel Drive Magnum 4X4 W97ac42a, Swedish Magnum 4X4 & Norwe
1997 SWEDISH MAGNUM 6X6 (S97AE42E) - Rear Wheel Drive Magnum 6X6 W97ae42a & Swedish Magnum 6X6
1997 TRAIL BLAZER (W97BA25C) - Rear Wheel Drive Sport 400L W97ba38c & Trail Blazer
1997 XPLORER 300 (W97CC28C) - Rear Wheel Drive Xplorer 300
1997 XPLORER 400L (W97CC38C) - Rear Wheel Drive Xplorer 400L
1997 XPRESS 300 (W97CA28C) - Rear Wheel Drive Xpress 300 & Xpress 400L W97ca38c
1997 XPRESS 400 (W97CA38C) - Rear Wheel Drive Xpress 300 W97ca28c & Xpress 400L
1998 BIG BOSS 500 6X6 (W98AE50A) - Rear Wheel Drive S98ae50e
1998 MAGNUM 2X4 (W98AA42A) - Rear Wheel Drive
1998 MAGNUM 4X4 (W98AC42A) - Rear Wheel Drive
1998 NORWEGIAN BIG BOSS 500 6X6 (N98AE50D) - Rear Wheel Drive S98ae50e
1998 NORWEGIAN MAGNUM 4X4 (N98AC42D) - Rear Wheel Drive W98ac42a
1998 SWEDISH BIG BOSS 500 6X6 (S98AE50E) - Rear Wheel Drive
1998 SWEDISH MAGNUM 4X4 (S98AC42E) - Rear Wheel Drive W98ac42a
1998 TRAIL BLAZER (W98BA25C) - Rear Wheel Drive Trail Blazer
1998 XPLORER 300 (W98CC28C) - Rear Wheel Drive Xplorer 300
1998 XPLORER 400L (W98CC38C) - Rear Wheel Drive Xplorer 400L
1998 XPRESS 300 (W98CA28C) - Rear Wheel Drive Xpress 300
1999 BIG BOSS 500 6X6 (A99AE50AA) - Rear Wheel Drive A99ae50da
1999 INTL BIG BOSS 500 6X6 (A99AE50DA) - Rear Wheel Drive
1999 XPLORER 300 (A99CC28CA) - Rear Wheel Drive
1999 XPRESS 300 (A99CA28CA) - Rear Wheel Drive

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post #8 of 33 (permalink) Old 07-07-2019, 08:10 AM Thread Starter
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My Vin:
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post #9 of 33 (permalink) Old 07-07-2019, 10:21 AM
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You have a 98 Scrambler 400 - model W98BC38C - it was purchased on 3/28/1998

It appears the rear axle assy (and possibly bearing carrier) is out of another model - only the previous owners know what has been done to it. You need to get the entire bearing carrier, axle assy. with the brake hub, caliper, line and possibly master cylinder and brake pedal (you did not indicate what parts you do have)

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post #10 of 33 (permalink) Old 07-07-2019, 10:24 AM Thread Starter
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I have the: caliper(new), master cylinder, brake line from front lever to rear, all the mounts for the caliper, so I still need the pedal and line from rear brake master to caliper.
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